| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ████████▃▃▃▄▅▅▅▄▅▅▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.67 | 0.662 | 0.689 | 0.75 | 0.766 | 0.765 | 0.761 | 0.76 | 0.77 | 0.769 | 0.646 | 0.655 | 0.687 | 0.691 | 0.688 | 0.688 | 0.695 | 0.695 | 0.696 | 0.705 | 0.714 | 0.713 | 0.741 | 0.739 | 0.735 | 0.529 | 0.523 | 0.523 | 0.523 | 0.522 | 0.52 | 0.52 | 0.52 | NA | 0.503 | NA | NA |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | █▁ | 75.331 | 74.389 | NA | 74.81 | 80.737 | 91.226 | NA | 93.435 | 93.163 | 93.218 | NA | 102.789 | 102.986 | 102.917 | NA | 103.055 | 103.665 | 93.692 | NA | 94.766 | 95.934 | 95.614 | NA | 95.692 | 96.05 | 95.771 | NA | 97.896 | 97.864 | 99.502 | NA | 100.239 | 93.604 | 82.064 | NA | 81.379 | 81.294 | 81.127 | NA | 81.195 | 81.169 | 80.69 | NA | 80.627 | 86.985 |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | █▁ | 75.331 | 74.389 | NA | 74.81 | 80.425 | 90.609 | NA | 92.086 | 91.764 | 92.302 | NA | 102.083 | 102.224 | 101.899 | NA | 102.245 | 102.649 | 92.63 | NA | 93.948 | 95.026 | 94.701 | NA | 95.002 | 95.307 | 95.131 | NA | 97.154 | 97.174 | 98.824 | NA | 99.473 | 92.083 | 81.191 | NA | 81.081 | 81.036 | 80.852 | NA | 80.94 | 80.912 | 80.367 | NA | 80.344 | 80.307 |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | █▁ | 1.802 | 1.703 | NA | 3.456 | 3.019 | 2.814 | NA | 0.0 | 0.0 | 0.95 | NA | 1.6 | 1.6 | 0.5 | NA | 1.15 | 0.0 | 0.0 | NA | 0.525 | 0.525 | 0.407479 | NA | 0.2 | 0.0 | 0.3 | NA | 0.0 | 0.0 | 0.0 | NA | 0.0 | 0.0 | 1.6 | NA | 1.4 | 1.5 | 1.5 | NA | 1.1 | 1.1 | NA | NA | NA | NA |
| us-gaap:EarningsPerShareBasic | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -4.41 | -0.16 | 6.32 | -43.53 | 3.13 | 1.36 | 0.47 | -0.65 | 0.46 | 0.23 | 2.12 | 0.63 | 0.27 | 0.42 | 4.36 | 0.3 | 0.43 | 0.62 | 1.34 | 0.54 | 0.52 | 0.25 | 0.62 | 0.46 | 0.48 | 0.26 | 0.99 | 0.5 | 0.43 | 0.27 | 0.02 | 0.37 | 0.19 | 0.21 | 0.73 | 0.33 | 0.37 | 0.36 | 0.28 | 0.24 | 0.23 | 0.19 | 0.4099999999999999 | 0.18 | 0.22 |
| us-gaap:EarningsPerShareDiluted | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -4.41 | -0.16 | 6.27 | -43.53 | 3.12 | 1.35 | 0.47 | -0.64 | 0.45 | 0.23 | 2.1 | 0.62 | 0.27 | 0.42 | 4.32 | 0.3 | 0.43 | 0.61 | 1.32 | 0.54 | 0.52 | 0.25 | 0.61 | 0.45 | 0.48 | 0.25 | 0.98 | 0.49 | 0.42 | 0.27 | 0.02 | 0.36 | 0.19 | 0.21 | 0.73 | 0.32 | 0.37 | 0.36 | 0.28 | 0.24 | 0.23 | 0.19 | 0.3999999999999999 | 0.18 | 0.21 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net profit Margin us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▄▃█▄▁▄▄▃▃▂▆▃▂▁▂▁▁ | 744.0 | 705.0 | 941.0 | 774.0 | 627.0 | 739.0 | 777.0 | 702.0 | 704.513 | 656.345 | 835.385 | 714.387 | 680.13 | 625.683 | 673.975 | 614.881 | 623.087 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▄▃█▄▁▄▄▃▃▂▆▃▂▁▂▁▁ | 744.0 | 705.0 | 941.0 | 774.0 | 627.0 | 739.0 | 777.0 | 702.0 | 704.513 | 656.345 | 835.385 | 714.387 | 680.13 | 625.683 | 673.975 | 614.881 | 623.087 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems sbgi:CorporateAndReconcilingItems | █▁ | 120.0 | 108.0 | NA | NA | 104.0 | 128.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,sbgi:BroadcastSegment | ▃▃█▄▁▄▅▃▃ | 687.0 | 665.0 | 896.0 | 734.0 | 592.0 | 701.0 | 751.0 | 661.0 | 660.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,sbgi:LocalSportsSegment | █▇▄▆▅█▇▁ | 838.0 | 768.0 | 531.0 | 727.0 | 616.0 | 812.0 | 787.0 | 352.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CorporateAndOther | NA | NA | 113.0 | 105.0 | 104.0 | 128.0 | 116.0 | 129.0 | 117.0 | 107.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
|---|
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:ComprehensiveIncomeNetOfTax | ▆▇█▁█▇▇▇▇▇█▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -335.0 | -4.0 | 468.0 | -3256.0 | 243.0 | 123.0 | 42.0 | -60.0 | 42.297 | 21.672 | 206.84 | 63.875 | 28.041 | 43.123 | 442.914 | 30.637 | 44.645 | 57.202 | 120.924 | 50.845 | 49.419 | 24.14 | 63.643 | 43.265 | 45.871 | 24.366 | 91.683 | 48.063 | 41.981 | 27.197 | 4.859 | 36.304 | 17.787 | 16.958 | 58.611 | 26.302 | 30.145 | 29.463 | 21.646 | 19.279 | 18.619 | 15.32 | 33.161 | 14.348 | 17.346 |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -331.0 | 34.0 | 515.0 | -3367.0 | 264.0 | 151.0 | 86.0 | -49.0 | 43.383 | 22.771 | 208.333 | 65.0 | 29.309 | 43.994 | 444.185 | 32.566 | 46.035 | 70.703 | 122.527 | 52.033 | 50.6 | 25.629 | 66.273 | 44.044 | 46.483 | 24.92 | 93.327 | 48.49 | 42.247 | 27.696 | 6.793 | 36.613 | 18.02 | 16.831 | 59.004 | 26.409 | 30.217 | 29.178 | 22.186 | 19.372 | 18.517 | 15.168 | 33.039 | 14.217 | 17.025 |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▂▁▅▅▁▃▃▃▂▁▄▂▂▃█▁▁ | 117.0 | 89.0 | 340.0 | 304.0 | 67.0 | 176.0 | 169.0 | 203.0 | 119.196 | 90.703 | 271.814 | 156.3 | 129.311 | 172.971 | 522.156 | 90.447 | 98.027 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▇██▁███▇█████▇███ | -336.0 | -27.0 | 242.0 | -3679.0 | 252.0 | 31.0 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▆▇█▁█▇▇▇▇▇█▇▇▇█▇▇ | -332.0 | -12.0 | 467.0 | -3256.0 | 252.0 | 123.0 | 43.0 | -60.0 | 42.297 | 22.771 | 211.597 | 63.875 | 28.041 | 43.123 | 461.005 | 30.637 | 44.645 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▂▁▅▆▁▃▃▃▂▁▄▂▁▂█▁▂ | 90.0 | 24.0 | 255.0 | 314.0 | 14.0 | 124.0 | 111.0 | 140.0 | 54.28 | 22.009 | 219.147 | 69.441 | 35.122 | 98.291 | 455.853 | 42.306 | 48.922 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▁█▂▂▂▂▂▃▂▂▂▂▁▃▂ | 130.0 | -40.0 | -789.0 | 2950.0 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -111.915 | -480.312 | -216.999 | -154.55 | -213.604 | -975.808 | -119.12 | -139.886 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:GainLossOnInvestments | ▁█ | -63.0 | 123.0 | NA | NA | -2.0 | -2.0 | NA | NA | NA | NA | NA | -25.379 | NA | NA | NA | -4.362 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:GainLossOnInvestments us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary | █▁ | 7.0 | -4.0 | NA | NA | 10.0 | -12.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:GainLossOnInvestments us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary | NA | NA | NA | -7.0 | -10.0 | NA | NA | -13.0 | -12.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:GainsLossesOnExtinguishmentOfDebt | NA | NA | -15.0 | 0.0 | 3.0 | 2.0 | NA | NA | 0.0 | 0.0 | NA | NA | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.4 | 0.0 | -23.699 | 0.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | -42.138 | 0.0 | -16.283 | NA | 0.0 | 0.0 | 0.0 | -0.335 | -0.328 | -0.117 | -3.478 | -0.924 | -1.889 | -3.939 | -0.149 | |
| us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType sbgi:DSG6.625Notes,us-gaap:SeniorNotes | NA | NA | NA | 0.0 | 3.0 | 2.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:GeneralAndAdministrativeExpense | ▂▃▂▂▂▂▃█▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 36.0 | 61.0 | 37.0 | 30.0 | 32.0 | 49.0 | 70.0 | 237.0 | 51.655 | 27.726 | 22.467 | 34.322 | 29.685 | 24.596 | 41.795 | 25.831 | 25.051 | 20.576 | 18.884 | 19.052 | 14.279 | 21.341 | 17.867 | 16.209 | 14.154 | 16.016 | 19.184 | 16.991 | 17.403 | 15.835 | 14.32 | 16.109 | 11.447 | 11.25 | 8.225 | 8.286 | 7.513 | 9.367 | 6.784 | 5.789 | 7.073 | 8.664 | 6.737 | 6.236 | 7.25 |
| us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | ▇▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -397.0 | 17.0 | 599.0 | -4214.0 | 327.0 | 139.0 | 79.0 | -144.0 | 46.01 | 27.53 | 193.492 | 62.352 | 26.012 | 28.366 | 298.864 | 49.684 | 70.915 | 99.282 | 178.857 | 79.019 | 77.205 | 37.809 | 71.553 | 51.244 | 69.733 | 41.263 | 149.103 | 56.292 | 64.675 | 42.477 | 22.494 | 35.04 | 22.61 | 25.364 | 84.357 | 45.729 | 48.535 | 33.947 | 36.437 | 30.316 | 30.852 | 23.484 | 50.626 | 19.367 | 27.194 |
| us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | NA | NA | 514.0 | -3367.0 | 273.0 | 151.0 | 88.0 | -49.0 | 43.0 | 22.771 | 207.694 | 65.0 | 29.309 | 43.994 | 444.8 | 32.566 | 46.035 | 70.703 | 122.5 | 52.033 | 50.6 | 25.629 | 60.83 | 44.034 | 46.399 | 24.836 | 97.089 | 48.768 | 41.601 | 27.657 | 4.237 | 30.551 | 12.956 | 16.515 | 58.752 | 26.576 | 30.199 | 29.141 | 23.353 | 19.441 | 18.376 | 15.234 | 33.332 | 14.213 | 16.678 | |
| us-gaap:IncomeTaxExpenseBenefit | ▇▇█▁█▇▇▇▇▇▇▇▇▇▆▇█████▇▇▇█▇█▇█▇▇▇▇▇██▇▇▇▇▇▇▇▇▇ | -69.0 | -9.0 | 85.0 | -847.0 | 54.0 | -12.0 | -8.0 | -95.0 | 2.627 | 4.759 | -14.202 | -2.648 | -3.297 | -15.628 | -145.937 | 17.118 | 24.88 | 28.579 | 56.357 | 26.986 | 26.605 | 12.18 | 10.723 | 7.21 | 23.334 | 16.427 | 52.014 | 7.524 | 23.074 | 14.82 | 18.257 | 4.489 | 9.654 | 8.849 | 25.641 | 19.153 | 18.336 | 4.806 | 13.084 | 10.875 | 12.476 | 8.25 | 17.294 | 5.154 | 10.516 |
| us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▆▆▇▃▇▆▇▄▇▇▆▇▇▆▁██ | 0.0 | 15.0 | 21.0 | -64.0 | 34.0 | 6.0 | 24.0 | -43.0 | 23.902 | 16.875 | 3.969 | 24.999 | 17.607 | 15.676 | -112.888 | 46.987 | 51.842 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▇██▁███▇█████████ | -45.0 | 2.0 | 37.0 | -727.0 | 12.0 | 13.0 | 2.0 | -21.0 | 0.34 | -0.198 | 6.342 | 0.963 | 2.1 | -15.885 | -4.899 | -3.688 | -1.78 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▇▃█▇▇▇▇▁▆▇▇▇▇▇▇▇▇ | -2.0 | -19.0 | 3.0 | -1.0 | -1.0 | -2.0 | -1.0 | -27.0 | -4.245 | -0.284 | 0.225 | -0.95 | -0.948 | -0.021 | -2.782 | -0.817 | -0.546 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▄▅█▁▇▃▃▆▄▅▄▃▄▅▄▄▄ | -22.0 | -7.0 | 24.0 | -55.0 | 9.0 | -29.0 | -33.0 | -4.0 | -17.37 | -11.634 | -24.886 | -27.66 | -22.056 | -15.398 | -24.895 | -25.364 | -24.636 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:InterestExpense | ▇▇▇▇▇██▆▂▂▂▃▄▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁ | 160.0 | 151.0 | 154.0 | 157.0 | 165.0 | 180.0 | 185.0 | 129.0 | 53.678 | 54.626 | 54.21 | 75.753 | 92.271 | 69.742 | 52.28 | 51.743 | 50.959 | 57.318 | 54.324 | 53.488 | 53.916 | 49.415 | 48.569 | 48.566 | 47.664 | 46.648 | 47.253 | 47.95 | 40.121 | 39.538 | 39.908 | 39.867 | 45.465 | 37.697 | 36.552 | 35.294 | 29.32 | 27.387 | 27.564 | 24.463 | 24.628 | 29.167 | 27.346 | 31.349 | 28.132 |
| us-gaap:NetIncomeLoss | ▁█ | -332.0 | -12.0 | NA | -3256.0 | 252.0 | 123.0 | NA | -60.0 | 42.297 | 22.0 | NA | 64.0 | 28.041 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 18.579 | NA | NA | NA | 17.273 |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | █▁ | 117.0 | 89.0 | NA | 304.0 | 67.0 | 176.0 | NA | 203.0 | 119.196 | 91.0 | NA | 156.0 | 129.311 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁█ | -337.0 | -73.0 | NA | -3568.0 | 240.0 | 3.0 | NA | -105.0 | 0.151 | -3.0 | NA | -9.0 | -9.883 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁█ | -332.0 | -12.0 | NA | -3256.0 | 252.0 | 123.0 | NA | -60.0 | 42.297 | 22.0 | NA | 64.0 | 28.041 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | █▁ | 90.0 | 24.0 | NA | 314.0 | 14.0 | 124.0 | NA | 140.0 | 54.28 | 22.0 | NA | 70.0 | 35.122 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations | █▁ | 130.0 | -40.0 | NA | 2950.0 | -321.0 | -303.0 | NA | -238.0 | -173.627 | -110.0 | NA | -217.0 | -154.55 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic | ▆▇█▁█▇▇▇▇▇█▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -332.0 | -12.0 | 467.0 | -3256.0 | 252.0 | 123.0 | 44.0 | -60.0 | 42.297 | 21.672 | 206.201 | 63.875 | 28.041 | 43.123 | 443.529 | 30.637 | 44.645 | 57.202 | 120.897 | 50.845 | 49.419 | 24.14 | 58.2 | 43.255 | 45.787 | 24.282 | 95.445 | 48.341 | 41.335 | 27.158 | 2.303 | 36.342 | 17.826 | 16.997 | 59.002 | 26.245 | 30.06 | 29.359 | 22.702 | 19.238 | 18.579 | 15.279 | 33.079 | 14.276 | NA |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted | ▄ | -332.0 | NA | NA | NA | 252.0 | NA | NA | NA | NA | 21.672 | 206.201 | 63.875 | 28.041 | 43.123 | 443.53 | 30.637 | 44.645 | 57.202 | 120.897 | 50.845 | 49.419 | 24.14 | 58.2 | 43.255 | 45.787 | 24.282 | 95.445 | 48.341 | 41.335 | 27.158 | 2.303 | 36.342 | 17.897 | 17.068 | 59.047 | 26.29 | 30.105 | 29.404 | 22.757 | 19.28 | 18.621 | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense | ▁▇▇█▃▂▂▄▆▆▆▅▅▅▆▆▆▆▆▆▆▆▆▆▇▇▆▆▇▇▅▇▆▇▇▇▇▇▇▇▇▇▇▇▇ | -219.0 | -18.0 | -26.0 | 2.0 | -165.0 | -188.0 | -198.0 | -138.0 | -59.989 | -66.068 | -69.462 | -95.458 | -105.57 | -78.948 | -58.718 | -53.763 | -47.934 | -58.347 | -54.589 | -74.975 | -51.869 | -48.53 | -52.69 | -48.362 | -44.607 | -43.284 | -59.846 | -45.371 | -38.364 | -38.523 | -80.742 | -37.808 | -61.67 | -38.292 | -34.678 | -32.828 | -23.457 | -25.975 | -27.451 | -21.917 | -26.706 | -27.992 | -31.176 | -36.728 | -28.766 |
| us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▅▄▅▄▅▅▁▄▄▄▃▂▃▄███ | -10.0 | -13.0 | -11.0 | -12.0 | -11.0 | -10.0 | -20.0 | -13.0 | -12.618 | -12.72 | -15.596 | -16.688 | -15.519 | -13.904 | -3.021 | -3.572 | -3.227 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▂▆▆█▁▁▁▃▆▆▆▆▆▆▅▆▆ | -84.0 | 12.0 | 10.0 | 54.0 | -116.0 | -119.0 | -112.0 | -70.0 | -3.858 | -5.608 | -4.468 | -3.325 | -7.495 | -3.371 | -13.239 | -6.092 | -1.08 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇ | -330.0 | -28.0 | 481.0 | -3254.0 | 254.0 | 124.0 | 46.0 | 35.0 | 57.203 | 23.608 | 208.643 | 65.597 | 29.986 | 45.718 | 444.583 | 32.094 | 46.616 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▂▁▅▅▁▂▂▃▂▁▄▂▁▂█▁▁ | 75.0 | 51.0 | 284.0 | 262.0 | 28.0 | 116.0 | 101.0 | 145.0 | 70.807 | 37.339 | 215.769 | 74.549 | 40.785 | 105.897 | 471.088 | 42.067 | 48.349 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▁█▂▂▂▂▂▃▂▂▂▂▁▃▂ | 130.0 | -40.0 | -790.0 | 2952.0 | -320.0 | -299.0 | -213.0 | -235.0 | -171.523 | -108.687 | -473.996 | -215.591 | -153.327 | -213.288 | -957.719 | -118.26 | -138.592 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingExpenses | ▃▃▂█▂▂▃▂▂▂▂▂▂▂▁▂▂▁▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 1790.0 | 1476.0 | 887.0 | 5755.0 | 791.0 | 1282.0 | 1345.0 | 1131.0 | 664.72 | 628.505 | 630.371 | 608.45 | 598.561 | 558.038 | 376.421 | 567.444 | 560.441 | 492.306 | 564.245 | 539.841 | 537.46 | 492.55 | 487.547 | 448.798 | 439.827 | 420.228 | 404.869 | 393.293 | 352.097 | 331.648 | 324.479 | 265.796 | 229.874 | 218.962 | 205.827 | 181.932 | 181.562 | 163.914 | 149.276 | 128.635 | 129.029 | 131.133 | 144.211 | 130.357 | 127.231 |
| us-gaap:OperatingIncomeLoss | ▇▇█▁██▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -178.0 | 35.0 | 625.0 | -4216.0 | 492.0 | 327.0 | 277.0 | -6.0 | 105.999 | 93.598 | 262.954 | 157.81 | 131.582 | 107.314 | 357.581 | 103.447 | 118.849 | 157.629 | 233.446 | 153.994 | 129.074 | 86.339 | 124.243 | 99.606 | 114.34 | 84.547 | 208.949 | 101.663 | 103.039 | 81.0 | 103.286 | 72.848 | 84.28 | 63.656 | 119.097 | 78.557 | 71.992 | 59.922 | 63.5 | 52.233 | 57.558 | 51.476 | 81.802 | 56.095 | 55.96 |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▁▇▄▁▃▃▂▂▁▅▃▂▃█▂▂ | 127.0 | 117.0 | 372.0 | 252.0 | 112.0 | 192.0 | 213.0 | 173.0 | 155.716 | 120.298 | 291.379 | 197.987 | 162.437 | 202.551 | 412.289 | 141.006 | 153.096 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▇▇█▁███▇▇▇▇▇▇▇▇▇▇ | -294.0 | -45.0 | 267.0 | -4460.0 | 389.0 | 163.0 | 92.0 | -45.0 | 5.421 | 4.613 | -3.583 | -3.329 | 0.98 | -69.301 | -10.948 | -9.3 | -6.373 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ██▇████▁▇████████ | -4.0 | -3.0 | -11.0 | -3.0 | -3.0 | -3.0 | -4.0 | -122.0 | -19.151 | -2.22 | -2.217 | -2.672 | -2.893 | -2.616 | -3.835 | -2.274 | -2.517 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▇▂███▅▄▇▂▃▄▂▃▄▁▄▄ | -7.0 | -34.0 | -4.0 | -3.0 | -5.0 | -21.0 | -22.0 | -9.0 | -33.897 | -26.964 | -21.508 | -32.768 | -27.719 | -23.004 | -39.13 | -25.125 | -24.063 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems sbgi:CorporateAndReconcilingItems | ▁█ | 4.0 | 13.0 | NA | NA | 12.0 | 19.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations | NA | NA | 1.0 | -2.0 | -1.0 | -4.0 | -2.0 | -3.0 | -2.09 | -2.129 | -0.92 | -1.408 | -1.223 | -0.316 | -0.614 | -0.86 | -1.294 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems us-gaap:IntersegmentElimination | ▄ | 1.0 | NA | -1.0 | 3.0 | -2.0 | -9.0 | -1.0 | -2.0 | -3.0 | -3.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,sbgi:BroadcastSegment | ▂▁█▅▂▃▄▃▃ | 105.0 | 63.0 | 334.0 | 221.0 | 83.0 | 152.0 | 162.0 | 154.0 | 135.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,sbgi:LocalSportsSegment | ▇▇█▁███▇▇ | -288.0 | -41.0 | 283.0 | -4450.0 | 399.0 | 165.0 | 86.0 | -56.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CorporateAndOther | NA | NA | 9.0 | 10.0 | 12.0 | 19.0 | 30.0 | -102.0 | -26.0 | 2.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax | ▃█▅▅▁ | -3.0 | 8.0 | 1.0 | 0.0 | -9.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 5.443 | 0.01 | 0.084 | 0.084 | -3.762 | -0.278 | 0.645 | 0.039 | NA | NA | NA | -0.039 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome | ▃█▅▅▁ | -3.0 | 8.0 | 1.0 | 0.0 | -9.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 5.443 | 0.01 | 0.084 | 0.084 | -3.762 | -0.278 | 0.645 | 0.039 | NA | NA | NA | -0.039 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherNonoperatingIncomeExpense | ▁▇██▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃ | -61.0 | 124.0 | 156.0 | 169.0 | 4.0 | -4.0 | -6.0 | 3.0 | 5.533 | 2.195 | -9.76 | 5.674 | 4.184 | 3.271 | 3.275 | 2.342 | 1.563 | 1.696 | 0.789 | 0.789 | 1.104 | 0.462 | 0.32 | -0.048 | 1.05 | 0.218 | 2.415 | 0.651 | 1.015 | 0.917 | 0.599 | 0.488 | 0.482 | 0.457 | 0.5 | 0.547 | 0.705 | 0.452 | 0.059 | 0.583 | 0.585 | 0.365 | 0.098 | 0.557 | 0.539 |
| us-gaap:ProfitLoss | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -328.0 | 26.0 | 514.0 | -3367.0 | 273.0 | 151.0 | 87.0 | -49.0 | 43.383 | 22.771 | 207.694 | 65.0 | 29.309 | 43.994 | 444.801 | 32.566 | 46.035 | 70.703 | 122.5 | 52.033 | 50.6 | 25.629 | 60.83 | 44.034 | 46.399 | 24.836 | 97.089 | 48.768 | 41.601 | 27.657 | 4.237 | 36.651 | 18.059 | 16.87 | 59.395 | 26.352 | 30.132 | 29.074 | 23.242 | 19.331 | 18.477 | 15.127 | 32.957 | 14.145 | 16.952 |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▂▁▅▅▁▃▃▃▂▁▄▂▂▃█▁▁ | 117.0 | 89.0 | 340.0 | 304.0 | 67.0 | 176.0 | 169.0 | 203.0 | 119.196 | 90.703 | 271.814 | 156.3 | 129.311 | 172.971 | 522.156 | 90.447 | 98.027 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▇▇█▁██▇▇█████▇███ | -333.0 | -35.0 | 240.0 | -3679.0 | 261.0 | 31.0 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▆▇█▁█▇▇▇▇▇█▇▇▇█▇▇ | -332.0 | -12.0 | 467.0 | -3256.0 | 252.0 | 123.0 | 43.0 | -60.0 | 42.297 | 21.672 | 206.201 | 63.875 | 28.041 | 43.123 | 443.53 | 30.637 | 44.645 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▂▁▅▆▁▃▃▃▂▁▄▂▁▂█▁▂ | 90.0 | 24.0 | 256.0 | 314.0 | 14.0 | 124.0 | 112.0 | 140.0 | 54.28 | 22.009 | 219.147 | 69.441 | 35.122 | 98.291 | 456.853 | 42.306 | 48.922 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▁█▂▂▂▂▂▃▂▂▂▂▁▃▂ | 130.0 | -40.0 | -789.0 | 2950.0 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -110.816 | -474.916 | -216.999 | -154.55 | -213.604 | -958.333 | -119.12 | -139.886 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:Revenues | █▇▇█▆██▆▄▄▄▄▄▃▄▃▃▃▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▂▁▁▁▁▁▁▁▁▁▁ | 1612.0 | 1511.0 | 1512.0 | 1539.0 | 1283.0 | 1609.0 | 1622.0 | 1125.0 | 770.719 | 722.103 | 893.325 | 766.26 | 730.143 | 665.352 | 734.002 | 670.891 | 679.29 | 649.935 | 797.691 | 693.835 | 666.534 | 578.889 | 611.79 | 548.404 | 554.167 | 504.775 | 613.818 | 494.956 | 455.136 | 412.648 | 427.715 | 338.644 | 314.154 | 282.618 | 329.517 | 260.489 | 253.554 | 223.836 | 212.776 | 180.868 | 186.587 | 182.609 | 226.013 | 186.452 | 183.191 |
| us-gaap:SellingGeneralAndAdministrativeExpense | █▇█▇▆▇█▆▆▅▆▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▄▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁ | 234.0 | 213.0 | 224.0 | 212.0 | 186.0 | 210.0 | 222.0 | 185.0 | 164.755 | 159.923 | 177.645 | 154.581 | 150.794 | 146.899 | 148.165 | 133.605 | 127.046 | 124.721 | 131.42 | 126.672 | 128.488 | 115.009 | 121.844 | 105.196 | 102.801 | 101.887 | 108.783 | 97.303 | 82.595 | 81.925 | 78.382 | 66.115 | 53.297 | 51.938 | 49.503 | 43.604 | 42.234 | 36.129 | 31.843 | 31.341 | 30.192 | 30.562 | 33.665 | 32.23 | 30.554 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
|---|
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | ▆▆▆▆████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁ | 12780.0 | 13132.0 | 13382.0 | 12483.0 | 16769.0 | 17360.0 | 17370.0 | 17779.0 | 6553.666 | 6634.208 | 6572.092 | 6627.414 | 6581.543 | 6663.411 | 6784.47 | 6687.069 | 6289.536 | 6317.323 | 5963.168 | 5866.188 | 5779.677 | 5747.198 | 5432.315 | 5480.447 | 5380.981 | 5417.479 | 5452.172 | 5294.256 | 4181.962 | 4110.113 | 4147.472 | 3617.673 | 3343.393 | 2734.528 | 2729.697 | 2245.536 | 2160.241 | 1771.245 | 1571.417 | 1563.85 | 1497.298 | NA | 1485.924 | NA | NA |
| us-gaap:Liabilities | ▇▇█▇████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁ | 14142.0 | 14130.0 | 14377.0 | 13966.0 | 14448.0 | 15182.0 | 14598.0 | 14742.0 | 5024.667 | 5115.055 | 4971.772 | 5041.86 | 4996.125 | 5091.868 | 5250.104 | 5578.77 | 5164.564 | 5220.424 | 5405.232 | 5379.522 | 5236.783 | 5227.3 | 4932.637 | 5029.186 | 4934.722 | 5005.039 | 5046.829 | 4939.813 | 3811.789 | 3767.746 | 3741.768 | 3201.435 | 2957.385 | 2831.815 | 2829.75 | 2297.92 | 2226.523 | 1858.456 | 1682.779 | 1689.208 | 1632.605 | NA | 1643.006 | NA | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | ▆▆▆▆████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁ | 12780.0 | 13132.0 | 13382.0 | 12483.0 | 16769.0 | 17360.0 | 17370.0 | 17779.0 | 6553.666 | 6634.208 | 6572.092 | 6627.414 | 6581.543 | 6663.411 | 6784.47 | 6687.069 | 6289.536 | 6317.323 | 5963.168 | 5866.188 | 5779.677 | 5747.198 | 5432.315 | 5480.447 | 5380.981 | 5417.479 | 5452.172 | 5294.256 | 4181.962 | 4110.113 | 4147.472 | 3617.673 | 3343.393 | 2734.528 | 2729.697 | 2245.536 | 2160.241 | 1771.245 | 1571.417 | 1563.85 | 1497.298 | NA | 1485.924 | NA | NA |
| us-gaap:StockholdersEquity | ▁▂▂▁███████████▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄ | -1624.0 | -1279.0 | -1274.0 | -1737.0 | 1609.0 | 1459.0 | 1502.0 | 1495.0 | 1569.115 | 1559.401 | 1638.836 | 1623.533 | 1621.167 | 1607.707 | 1568.738 | 1141.995 | 1158.176 | 1129.153 | 587.983 | 516.516 | 570.512 | 547.048 | 525.81 | 476.779 | 469.059 | 437.244 | 427.882 | 374.735 | 362.778 | 332.794 | 396.37 | 408.521 | 378.719 | -104.728 | -116.95 | -61.749 | -76.587 | -97.818 | -121.175 | -133.192 | -143.152 | NA | -165.423 | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▃▄▃▃▅▄▅▄▅▆▇█ | 3421.0 | 3517.0 | 3546.0 | 3512.0 | 3494.0 | 3594.0 | 3554.0 | 3601.0 | 3578.115 | 3608.212 | 3652.8 | 3708.34 | 3757.325 | NA | 4114.746 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▂▂▁████▅▅▅▅▅ | -2406.0 | -2107.0 | -2098.0 | -2338.0 | 1220.0 | 1020.0 | 1069.0 | 1145.0 | -145.44 | -101.131 | -107.825 | -124.742 | -135.558 | NA | -82.051 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁▂▂▁█████████ | -1624.0 | -1278.0 | -1273.0 | -1737.0 | 1610.0 | 1460.0 | 1503.0 | 1495.0 | 1569.115 | 1559.401 | 1638.836 | 1623.533 | 1621.167 | NA | 1568.738 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▅▄▅▃▁▂▃▂█▇███ | 1254.0 | 1226.0 | 1261.0 | 1092.0 | 895.0 | 956.0 | 1060.0 | 977.0 | 1550.19 | 1485.347 | 1579.147 | 1580.349 | 1594.621 | NA | 1498.152 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidationItems srt:ConsolidationEliminations | █▇▇█▁▁▁▁▂▂▂▂▂ | -2269.0 | -2637.0 | -2710.0 | -2266.0 | -5610.0 | -5571.0 | -5684.0 | -5723.0 | -4982.865 | -4992.428 | -5124.122 | -5163.947 | -5216.388 | NA | -5530.847 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsCurrent | ▇▇█▆▇█▇▇▄▄▅▅▄▅▅▄▄▄▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁ | 2657.0 | 2970.0 | 3217.0 | 2541.0 | 2592.0 | 3069.0 | 2913.0 | 2903.0 | 1635.63 | 1683.002 | 1783.906 | 1790.735 | 1678.759 | 1714.691 | 1714.747 | 1589.431 | 1422.442 | 1440.81 | 905.088 | 790.09 | 678.019 | 682.532 | 701.763 | 672.249 | 543.799 | 533.777 | 526.165 | 573.276 | 763.005 | 785.755 | 697.871 | 587.582 | 806.921 | 292.932 | 304.448 | 289.158 | 230.368 | 222.264 | 209.717 | 245.645 | 246.584 | NA | 238.695 | NA | NA |
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▆▆▇▄▄███▆▆▆▆▆▅▄▄▅▅▂▁▁▂▂▂▁▁▁▁▃▃▂▂▄▁▁▁▁▁▁▁▁▂▁▁▁ | 964.0 | 941.0 | 1259.0 | 632.0 | 622.0 | 1342.0 | 1333.0 | 1399.0 | 929.038 | 975.347 | 1060.33 | 1022.974 | 1014.718 | 810.232 | 681.326 | 602.193 | 796.047 | 815.7 | 259.984 | 104.545 | 103.727 | 141.524 | 149.972 | 119.389 | 64.579 | 57.843 | 17.682 | 99.35 | 395.546 | 317.811 | 280.104 | 228.994 | 550.812 | 25.825 | 22.865 | 44.625 | 31.078 | 26.802 | 12.967 | 61.367 | 50.531 | 124.107 | 21.695 | 41.497 | 42.394 |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | ▅▅▇▃▃███▅▅▆▆▆▆▆▅▄▄▁ | 968.0 | 945.0 | 1262.0 | 633.0 | 622.0 | 1342.0 | 1333.0 | 1399.0 | 929.038 | 975.347 | 1060.33 | 1024.482 | 1016.224 | 1038.295 | 995.94 | 916.496 | 799.543 | 820.394 | 260.184 | NA | NA | NA | 153.697 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:AccountsReceivableNetCurrent | █▇▇█▇███▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁ | 1148.0 | 1058.0 | 1060.0 | 1108.0 | 985.0 | 1100.0 | 1132.0 | 1137.0 | 589.952 | 581.226 | 598.597 | 609.742 | 566.17 | 538.472 | 566.464 | 523.111 | 537.286 | 510.079 | 513.954 | 519.662 | 489.884 | 417.06 | 424.608 | 387.11 | 384.57 | 368.696 | 383.503 | 327.618 | 300.272 | 285.26 | 308.974 | 250.054 | 210.802 | 196.898 | 183.48 | 151.517 | 159.842 | 136.242 | 132.915 | 114.771 | 118.614 | NA | 120.977 | NA | NA |
| us-gaap:OtherAssetsCurrent | ▅█▇▇█▅▄▃▂▂▂▂▁▂▂▂▁▂▂▂▁▂▂▂▁▂▂▂▁▁▂▁▁▁▁▁▁ | 545.0 | 971.0 | 898.0 | 801.0 | 985.0 | 627.0 | 448.0 | 367.0 | 116.64 | 126.429 | 124.979 | 158.019 | 97.871 | 139.429 | 153.847 | 151.325 | 89.109 | 115.031 | 131.15 | 165.883 | 84.408 | 123.948 | 127.183 | 165.75 | 94.65 | 107.238 | 118.476 | 146.283 | 66.963 | 84.569 | 108.611 | 102.634 | 45.278 | 53.285 | 67.33 | 77.897 | 38.505 | NA | 63.583 | NA | NA | NA | NA | NA | NA |
| us-gaap:PrepaidExpenseAndOtherAssetsCurrent | ▅▆▅▆▅▅█▇▃▃▂▃▃▃▂▂▂▂▂▂▂▂▁▂▂▂▁▂▁▁▂▁▁▁▁▁▁▁▁▁▁ | 175.0 | 194.0 | 170.0 | 218.0 | 150.0 | 152.0 | 287.0 | 237.0 | 86.574 | 84.337 | 60.732 | 70.891 | 78.214 | 68.784 | 54.31 | 37.384 | 36.343 | 41.049 | 36.267 | 37.909 | 38.949 | 52.093 | 26.903 | 35.951 | 41.661 | 33.213 | 21.338 | 32.473 | 25.186 | 25.136 | 30.599 | 14.78 | 11.788 | 9.936 | 7.404 | 9.112 | 8.444 | 18.757 | 17.274 | 8.244 | 8.875 | NA | 5.996 | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 4219.0 | NA | NA | NA | 4056.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross | NA | NA | 1688.0 | NA | NA | NA | 1558.0 | NA | NA | NA | 1453.265 | NA | NA | NA | 1486.637 | NA | NA | NA | 1402.735 | NA | NA | NA | 1304.481 | NA | NA | NA | 1273.055 | NA | NA | NA | 1037.632 | NA | NA | NA | 828.866 | NA | NA | NA | 630.428 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType sbgi:AutomotiveEquipment | NA | NA | 66.0 | NA | NA | NA | 64.0 | NA | NA | NA | 62.663 | NA | NA | NA | 63.513 | NA | NA | NA | 56.507 | NA | NA | NA | 47.402 | NA | NA | NA | 37.726 | NA | NA | NA | 23.443 | NA | NA | NA | 20.634 | NA | NA | NA | 12.578 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType sbgi:OperatingEquipment | NA | NA | 939.0 | NA | NA | NA | 781.0 | NA | NA | NA | 744.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType sbgi:RealEstateHeldForDevelopmentAndSale | NA | NA | 25.0 | NA | NA | NA | 26.0 | NA | NA | NA | 34.645 | NA | NA | NA | 87.056 | NA | NA | NA | 90.087 | NA | NA | NA | 91.106 | NA | NA | NA | 113.514 | NA | NA | NA | 67.037 | NA | NA | NA | 56.419 | NA | NA | NA | 55.517 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:AssetsHeldUnderCapitalLeases | NA | NA | 59.0 | NA | NA | NA | 53.0 | NA | NA | NA | 53.401 | NA | NA | NA | 53.005 | NA | NA | NA | 84.516 | NA | NA | NA | 84.474 | NA | NA | NA | 81.625 | NA | NA | NA | 81.602 | NA | NA | NA | 79.126 | NA | NA | NA | 79.259 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovements | NA | NA | 307.0 | NA | NA | NA | 293.0 | NA | NA | NA | 278.649 | NA | NA | NA | 260.47 | NA | NA | NA | 239.603 | NA | NA | NA | 210.597 | NA | NA | NA | 192.478 | NA | NA | NA | 168.441 | NA | NA | NA | 135.162 | NA | NA | NA | 98.283 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgress | NA | NA | 36.0 | NA | NA | NA | 116.0 | NA | NA | NA | 71.461 | NA | NA | NA | 30.575 | NA | NA | NA | 30.88 | NA | NA | NA | 34.666 | NA | NA | NA | 18.774 | NA | NA | NA | 17.078 | NA | NA | NA | 18.274 | NA | NA | NA | 6.647 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixtures | NA | NA | 123.0 | NA | NA | NA | 114.0 | NA | NA | NA | 107.536 | NA | NA | NA | 109.632 | NA | NA | NA | 101.252 | NA | NA | NA | 85.411 | NA | NA | NA | 70.402 | NA | NA | NA | 50.21 | NA | NA | NA | 41.134 | NA | NA | NA | 37.305 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndLandImprovements | NA | NA | 74.0 | NA | NA | NA | 75.0 | NA | NA | NA | 76.501 | NA | NA | NA | 77.487 | NA | NA | NA | 73.124 | NA | NA | NA | 60.678 | NA | NA | NA | 55.269 | NA | NA | NA | 37.517 | NA | NA | NA | 33.932 | NA | NA | NA | 20.303 | NA | NA | NA | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovements | NA | NA | 59.0 | NA | NA | NA | 36.0 | NA | NA | NA | 24.115 | NA | NA | NA | 25.12 | NA | NA | NA | 24.762 | NA | NA | NA | 22.693 | NA | NA | NA | 19.091 | NA | NA | NA | 19.453 | NA | NA | NA | 18.362 | NA | NA | NA | 14.495 | NA | NA | NA | NA | NA | NA | |
| us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | NA | NA | 865.0 | NA | NA | NA | 793.0 | NA | NA | NA | 770.131 | NA | NA | NA | 748.339 | NA | NA | NA | 685.159 | NA | NA | NA | 587.344 | NA | NA | NA | 520.517 | NA | NA | NA | 441.561 | NA | NA | NA | 389.153 | NA | NA | NA | 348.907 | NA | NA | NA | NA | NA | NA | |
| us-gaap:AmortizationOfIntangibleAssets | ▇▇▇████▅▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁ | 119.0 | 125.0 | 123.0 | 149.0 | 150.0 | 150.0 | 144.0 | 96.0 | 43.537 | 43.464 | 43.526 | 44.6 | 43.117 | 43.605 | 46.501 | 43.368 | 43.377 | 45.554 | 46.603 | 47.807 | 45.625 | 43.765 | 42.015 | 40.014 | 39.445 | 39.98 | 41.301 | 34.478 | 24.989 | 24.728 | 22.093 | 17.168 | 15.557 | 16.002 | 11.405 | 10.669 | 10.126 | 5.819 | 4.028 | 4.393 | 4.614 | NA | NA | NA | NA |
| us-gaap:PropertyPlantAndEquipmentNet | ██████▇▇▆▆▆▆▆▆▇▇▆▇▇▇▇▇▇▇▇▇▇▇▆▅▅▄▃▃▃▂▂▁▁▁▁ | 789.0 | 804.0 | 823.0 | 814.0 | 809.0 | 786.0 | 765.0 | 740.0 | 699.505 | 687.217 | 683.134 | 674.44 | 666.636 | 654.432 | 738.298 | 724.125 | 705.483 | 712.467 | 717.576 | 713.088 | 727.806 | 723.762 | 717.137 | 746.662 | 741.854 | 742.397 | 752.538 | 712.677 | 636.112 | 574.091 | 596.071 | 513.382 | 454.814 | 431.542 | 439.713 | 365.685 | 372.049 | 314.434 | 281.521 | 276.67 | 277.581 | NA | 272.221 | NA | NA |
| us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁▂▁▁█▇██▅▅▆▆▆ | 454.0 | 528.0 | 430.0 | 331.0 | 2258.0 | 2120.0 | 2270.0 | 2263.0 | 1546.563 | 1524.76 | 1604.234 | 1587.271 | 1589.959 | NA | 1537.337 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▁▃▄▃▃▅▄▅▄▅▆▇█ | 3424.0 | 3519.0 | 3549.0 | 3516.0 | 3497.0 | 3595.0 | 3558.0 | 3601.0 | 3579.483 | 3608.898 | 3654.263 | 3707.696 | 3756.415 | NA | 4116.241 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:Goodwill | ▃▃▃▃███▇▄▄▄▄▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁ | 2088.0 | 2091.0 | 2092.0 | 2092.0 | 4716.0 | 4716.0 | 4716.0 | 4048.0 | 2123.902 | 2123.902 | 2123.902 | 2125.402 | 2022.073 | 2021.97 | 2124.033 | 2113.651 | 2002.809 | 1998.135 | 1990.746 | 1989.578 | 2017.382 | 2081.936 | 1931.093 | 1951.428 | 1951.302 | 1951.074 | 1964.553 | 1820.042 | 1341.998 | 1336.748 | 1380.082 | 1297.638 | 1105.005 | 1067.33 | 1074.032 | 908.037 | 912.862 | 728.306 | 660.117 | 660.117 | 659.705 | NA | 659.605 | NA | NA |
| us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill | ▄▄█▇▇▆▆▆▆▆▆▆▅▅▆█▆▅▅▅▆▇▁ | 150.0 | 150.0 | 171.0 | 163.0 | 163.0 | 158.0 | 158.0 | 158.0 | 158.364 | 158.364 | 158.222 | 158.222 | 156.654 | 156.629 | 159.371 | 168.72 | 160.357 | 157.106 | 156.306 | 153.125 | 157.725 | 167.075 | 132.465 | NA | NA | NA | 135.075 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:FiniteLivedIntangibleAssetsNet | ▅▅▅▅▇▇▇█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁ | 5347.0 | 5500.0 | 5624.0 | 5747.0 | 7664.0 | 7814.0 | 7977.0 | 9104.0 | 1540.483 | 1584.021 | 1626.88 | 1670.34 | 1686.263 | 1729.563 | 1801.67 | 1841.938 | 1725.508 | 1757.28 | 1944.403 | 1983.326 | 1975.786 | 1861.444 | 1751.57 | 1763.693 | 1792.919 | 1822.211 | 1818.263 | 1652.634 | 1081.518 | 1077.769 | 1127.755 | 819.678 | 656.081 | 624.982 | 623.406 | 379.757 | 391.89 | 266.695 | 175.341 | 178.03 | 143.854 | NA | 150.738 | NA | NA |
| us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:InvestmentsByConsolidatedAndNonconsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary | NA | NA | NA | 15.0 | 18.0 | NA | 15.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingLeaseRightOfUseAsset | ▁▂▄▅▇██▇▃▃ | 179.0 | 189.0 | 197.0 | 206.0 | 220.0 | 226.0 | 223.0 | 222.0 | 192.39 | 193.792 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherAssetsNoncurrent | ██▇▄▄▄▄▄▁▁▁▁▂▂▂▂▂▂▂▂▂▂▁▁▁▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁ | 1273.0 | 1222.0 | 1058.0 | 660.0 | 605.0 | 591.0 | 613.0 | 598.0 | 195.868 | 194.541 | 184.831 | 188.097 | 218.458 | 229.563 | 241.645 | 223.69 | 246.861 | 223.379 | 220.63 | 224.736 | 212.475 | 212.906 | 175.566 | 189.708 | 192.836 | 204.559 | 208.23 | 222.202 | 208.321 | 205.614 | 208.209 | 229.677 | 188.705 | 195.713 | 189.984 | 174.439 | 170.998 | 129.204 | 123.409 | 117.099 | 116.307 | NA | 108.338 | NA | NA |
| us-gaap:EquitySecuritiesFvNi | █▁▁ | 550.0 | 88.0 | 68.0 | NA | NA | NA | NA | NA | NA | NA | NA | 18.7 | 18.5 | NA | 12.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent | ▆▅▅▅▆▅█▆▄▄▄▄▅▃▄▃▃▂▃▃▃▂▂▃▂▂▂▃▂▂▂▂▁▂▁▁▁ | 588.0 | 469.0 | 533.0 | 466.0 | 573.0 | 526.0 | 782.0 | 630.0 | 424.58 | 376.287 | 413.227 | 428.471 | 455.463 | 356.792 | 370.403 | 290.848 | 290.758 | 245.987 | 322.505 | 291.213 | 271.926 | 261.888 | 251.313 | 272.47 | 236.239 | 245.055 | 258.371 | 282.65 | 197.363 | 233.336 | 196.174 | 215.191 | 138.613 | 176.252 | 153.817 | 153.541 | 122.363 | NA | 88.57 | NA | NA | NA | NA | NA | NA |
| us-gaap:AccruedLiabilitiesCurrent | NA | NA | 533.0 | NA | NA | NA | 782.0 | NA | NA | NA | 413.227 | NA | NA | NA | 370.403 | NA | NA | NA | 322.505 | NA | NA | NA | 251.313 | 265.787 | 218.395 | 237.709 | 246.123 | 263.836 | 187.612 | 225.033 | 182.185 | 200.779 | 128.838 | 167.044 | 143.731 | 147.334 | 115.061 | 101.739 | 79.698 | 88.318 | 70.518 | NA | 64.645 | NA | NA | |
| us-gaap:ContractWithCustomerLiabilityCurrent | NA | NA | NA | 75.0 | 38.0 | 45.0 | 54.0 | 61.0 | 67.8 | 75.1 | 83.27 | NA | NA | NA | 49.522 | NA | NA | NA | 31.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:UnusualOrInfrequentItem sbgi:DistributionRevenueRebate | NA | 183.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:DebtCurrent | ▃▃▃▃▃▃▃▃▁▂▂▂▂██ | 66.0 | 58.0 | 58.0 | 72.0 | 71.0 | 71.0 | 71.0 | 71.0 | 25.207 | 42.193 | 42.564 | 43.698 | 44.191 | 154.944 | 161.049 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LiabilitiesCurrent | ▇▆▇▇▆▆██▄▄▄▄▄▄▅▆▄▃▄▄▄▄▄▃▃▃▃▃▂▃▂▂▁▂▂▂▁▁▁▁▁ | 1036.0 | 922.0 | 1034.0 | 974.0 | 903.0 | 840.0 | 1134.0 | 1093.0 | 526.224 | 539.58 | 572.585 | 600.604 | 568.017 | 591.681 | 726.349 | 911.223 | 537.488 | 467.468 | 636.473 | 599.745 | 531.74 | 537.706 | 535.003 | 491.92 | 396.881 | 431.179 | 494.006 | 463.027 | 336.684 | 397.881 | 343.381 | 340.711 | 226.288 | 311.164 | 307.6 | 303.238 | 231.778 | 218.403 | 195.582 | 199.899 | 177.567 | NA | 188.985 | NA | NA |
| us-gaap:LongTermDebtCurrent | NA | NA | 56.0 | NA | NA | NA | 69.0 | NA | NA | NA | 41.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingLeaseLiabilityCurrent | ▂▄▅▇██▇▇▁▁ | 26.0 | 30.0 | 34.0 | 38.0 | 41.0 | 41.0 | 38.0 | 38.0 | 22.662 | 22.779 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherAccruedLiabilitiesCurrent | NA | NA | 90.0 | NA | NA | NA | 115.0 | NA | NA | NA | 107.938 | NA | NA | NA | 101.356 | NA | NA | NA | 99.19 | NA | NA | NA | 73.943 | NA | NA | NA | 58.524 | NA | NA | NA | 92.124 | NA | NA | NA | 78.013 | NA | NA | NA | 37.498 | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherLiabilitiesCurrent | ▇▇█▇▄▃▄▆▁▃▂▃▁▁▅▃▁▄▃▃▁▂▂▃▂▃▂▃▁▂▂▂▁▂▂▂▁ | 293.0 | 288.0 | 317.0 | 287.0 | 169.0 | 133.0 | 155.0 | 247.0 | 76.437 | 121.1 | 116.794 | 128.435 | 68.363 | 79.945 | 194.897 | 142.905 | 76.027 | 154.409 | 139.233 | 139.695 | 81.269 | 104.068 | 116.34 | 149.192 | 95.826 | 124.52 | 117.417 | 134.571 | 80.718 | 99.048 | 98.494 | 106.627 | 66.403 | 84.508 | 102.06 | 101.501 | 63.785 | NA | 65.803 | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 2327.0 | NA | NA | NA | 2313.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LongTermDebt | NA | NA | 12513.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 4030.0 | NA | 4055.6 | 4068.1 | 4084.0 | NA | 4206.3 | 4178.8 | NA | NA | 3891.0 | 3889.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LongTermDebt us-gaap:CreditFacility,us-gaap:DebtInstrument sbgi:STGTermLoanFacility,sbgi:STGTermLoanB3 | ▄ | 735.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:DebtAndCapitalLeaseObligations | ▇▇▇▇▇█▇▇▁▁▁▁ | 12539.0 | 12540.0 | 12551.0 | 12463.0 | 12399.0 | 13302.0 | 12438.0 | 12463.0 | 3788.0 | 3883.1 | 3892.5 | 3902.3 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 3875.671 | NA | NA | NA | 3913.774 | NA | NA | NA | 3018.695 | NA | NA | NA | 2277.123 | NA | NA | NA | 1204.971 | NA | NA | NA | NA | NA | NA |
| us-gaap:LongTermDebtAndCapitalLeaseObligations | ████▇███▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁ | 12473.0 | 12482.0 | 12493.0 | 12391.0 | 12328.0 | 13231.0 | 12669.0 | 12392.0 | 3762.794 | 3840.952 | 3849.891 | 3858.558 | 3864.048 | 3875.025 | 3875.116 | 3876.134 | 3884.159 | 4002.553 | 4014.932 | 4022.437 | 3984.262 | 3998.674 | 3669.16 | 3804.877 | 3808.085 | 3831.823 | 3796.666 | 3725.185 | 3038.768 | 2954.108 | 2966.402 | 2436.386 | 2407.68 | 2201.629 | 2210.866 | 1664.883 | 1667.809 | 1312.127 | 1148.271 | 1156.757 | 1141.405 | NA | 1148.673 | NA | NA |
| us-gaap:MinorityInterest | ▄▅▅▄███▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂ | 72.0 | 93.0 | 89.0 | 60.0 | 202.0 | 197.0 | 192.0 | 180.0 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16.897 | 9.365 | 10.305 | 10.607 | 9.813 | 7.834 | 7.845 | NA | 8.341 | NA | NA |
| us-gaap:OtherLiabilitiesNoncurrent | ▅▆█▅▇▆▆█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ | 417.0 | 506.0 | 622.0 | 364.0 | 520.0 | 431.0 | 434.0 | 640.0 | 84.917 | 80.235 | 85.983 | 78.984 | 77.196 | 77.063 | 79.009 | 70.818 | 86.554 | 82.553 | 76.493 | 71.619 | 72.429 | 71.687 | 68.631 | 72.593 | 78.512 | 78.174 | 77.0 | 73.718 | 68.569 | 66.819 | 67.338 | 63.751 | 47.221 | 53.14 | 48.291 | 50.97 | 47.231 | 46.824 | 47.204 | 46.139 | 46.948 | NA | 45.847 | NA | NA |
| us-gaap:OperatingLeaseLiabilityNoncurrent | ▁▃▄▅▇██▇▃▃ | 187.0 | 194.0 | 198.0 | 203.0 | 211.0 | 216.0 | 217.0 | 213.0 | 194.259 | 193.97 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | NA | NA | 36.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree | NA | NA | 32.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour | NA | NA | 26.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive | NA | NA | 24.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | NA | NA | 142.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquity | ▁▂▂▁███████████▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄ | -1624.0 | -1279.0 | -1274.0 | -1737.0 | 1609.0 | 1459.0 | 1502.0 | 1495.0 | 1569.115 | 1559.401 | 1638.836 | 1623.533 | 1621.167 | 1607.707 | 1568.738 | 1141.995 | 1158.176 | 1129.153 | 587.983 | 516.516 | 570.512 | 547.048 | 525.81 | 476.779 | 469.059 | 437.244 | 427.882 | 374.735 | 362.778 | 332.794 | 396.37 | 408.521 | 378.719 | -104.728 | -116.95 | -61.749 | -76.587 | -97.818 | -121.175 | -133.192 | -143.152 | NA | -165.423 | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▃▄▃▃▅▄▅▄▅▆▇█ | 3421.0 | 3517.0 | 3546.0 | 3512.0 | 3494.0 | 3594.0 | 3554.0 | 3601.0 | 3578.115 | 3608.212 | 3652.8 | 3708.34 | 3757.325 | NA | 4114.746 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▂▂▁████▅▅▅▅▅ | -2406.0 | -2107.0 | -2098.0 | -2338.0 | 1220.0 | 1020.0 | 1069.0 | 1145.0 | -145.44 | -101.131 | -107.825 | -124.742 | -135.558 | NA | -82.051 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁▂▂▁█████████ | -1624.0 | -1278.0 | -1273.0 | -1737.0 | 1610.0 | 1460.0 | 1503.0 | 1495.0 | 1569.115 | 1559.401 | 1638.836 | 1623.533 | 1621.167 | NA | 1568.738 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▅▄▅▃▁▂▃▂█▇███ | 1254.0 | 1226.0 | 1261.0 | 1092.0 | 895.0 | 956.0 | 1060.0 | 977.0 | 1550.19 | 1485.347 | 1579.147 | 1580.349 | 1594.621 | NA | 1498.152 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquity us-gaap:ConsolidationItems srt:ConsolidationEliminations | █▇▇█▁▁▁▁▂▂▂▂▂ | -2269.0 | -2637.0 | -2710.0 | -2266.0 | -5610.0 | -5571.0 | -5684.0 | -5723.0 | -4982.865 | -4992.428 | -5124.122 | -5163.947 | -5216.388 | NA | -5530.847 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | ▁▂▂▁████▇▇████▇▇▇▇▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄ | -1552.0 | -1186.0 | -1185.0 | -1677.0 | 1811.0 | 1656.0 | 1694.0 | 1675.0 | 1528.999 | 1519.153 | 1600.32 | 1585.554 | 1585.418 | 1571.543 | 1534.366 | 1108.299 | 1124.972 | 1096.899 | 557.936 | 486.666 | 542.894 | 519.898 | 499.678 | 451.261 | 446.259 | 412.44 | 405.343 | 354.443 | 370.173 | 342.367 | 405.704 | 416.238 | 386.008 | -97.287 | -100.053 | -52.384 | -66.282 | -87.211 | -111.362 | -125.358 | -135.307 | NA | -157.082 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassA,us-gaap:CommonStock | ████████▃▃▃▄▅▅▅▄▅▅▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.67 | 0.662 | 0.689 | 0.75 | 0.766 | 0.765 | 0.761 | 0.76 | 0.77 | 0.769 | 0.646 | 0.655 | 0.687 | 0.691 | 0.688 | 0.688 | 0.695 | 0.695 | 0.696 | 0.705 | 0.714 | 0.713 | 0.741 | 0.739 | 0.735 | 0.529 | 0.523 | 0.523 | 0.523 | 0.522 | 0.52 | 0.52 | 0.52 | NA | 0.503 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome | ▅▇▂▁▁▇▇████████████████▄▄▄▄▇▇▇▇▅▅▅▅▅▅▅▅▆▆ | -5.0 | -2.0 | -10.0 | -11.0 | -11.0 | -2.0 | -2.0 | -1.0 | -0.784 | -0.784 | -0.784 | -1.423 | -1.423 | -1.423 | -1.423 | -0.807 | -0.807 | -0.807 | -0.807 | -0.834 | -0.834 | -0.834 | -0.834 | -6.277 | -6.287 | -6.371 | -6.455 | -2.693 | -1.869 | -2.514 | -2.553 | -5.109 | -5.071 | -5.032 | -4.993 | -4.602 | -4.659 | -4.744 | -4.848 | -3.792 | -3.833 | NA | -3.914 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital | ▂▂▂▂▃▃▅▅▅▅▆▇██████▃▄▄▄▄▄▅▅▅▅▅▅▆▆▆▁▁▁▁▁▁▁▁ | 740.0 | 735.0 | 721.0 | 711.0 | 787.0 | 864.0 | 1011.0 | 1028.0 | 1024.155 | 1038.332 | 1121.054 | 1293.169 | 1336.251 | 1332.432 | 1320.298 | 1318.155 | 1346.657 | 1343.793 | 843.691 | 876.895 | 964.818 | 973.663 | 962.726 | 961.709 | 981.607 | 979.914 | 979.202 | 1001.947 | 1021.46 | 1018.869 | 1094.918 | 1097.098 | 1088.639 | 608.235 | 600.928 | 622.133 | 621.556 | 620.855 | 617.375 | 617.584 | 617.191 | NA | 609.64 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | ▄▅▅▄███▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂ | 72.0 | 93.0 | 89.0 | 60.0 | 202.0 | 197.0 | 192.0 | 180.0 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16.897 | 9.365 | 10.305 | 10.607 | 9.813 | 7.834 | 7.845 | NA | 8.341 | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:RetainedEarnings | ▁▂▂▁█▇▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅ | -2360.0 | -2013.0 | -1986.0 | -2438.0 | 832.0 | 596.0 | 492.0 | 467.0 | 544.824 | 520.936 | 517.62 | 330.78 | 285.316 | 275.676 | 248.845 | -176.37 | -188.701 | -214.859 | -255.804 | -360.459 | -394.418 | -426.731 | -437.029 | -479.6 | -507.215 | -537.253 | -545.82 | -625.484 | -657.787 | -684.534 | -696.996 | -684.47 | -705.846 | -708.748 | -713.697 | -680.092 | -694.296 | -714.74 | -734.511 | -747.793 | -757.319 | NA | -771.953 | NA | NA |
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ████████▃▃▃▄▅▅▅▄▅▅▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.67 | 0.662 | 0.689 | 0.75 | 0.766 | 0.765 | 0.761 | 0.76 | 0.77 | 0.769 | 0.646 | 0.655 | 0.687 | 0.691 | 0.688 | 0.688 | 0.695 | 0.695 | 0.696 | 0.705 | 0.714 | 0.713 | 0.741 | 0.739 | 0.735 | 0.529 | 0.523 | 0.523 | 0.523 | 0.522 | 0.52 | 0.52 | 0.52 | NA | 0.503 | NA | NA |
| us-gaap:AdditionalPaidInCapitalCommonStock | ▂▂▂▂▃▃▅▅▅▅▆▇██████▃▄▄▄▄▄▅▅▅▅▅▅▆▆▆▁▁▁▁▁▁▁▁ | 740.0 | 735.0 | 721.0 | 711.0 | 787.0 | 864.0 | 1011.0 | 1028.0 | 1024.155 | 1038.332 | 1121.054 | 1293.169 | 1336.251 | 1332.432 | 1320.298 | 1318.155 | 1346.657 | 1343.793 | 843.691 | 876.895 | 964.818 | 973.663 | 962.726 | 961.709 | 981.607 | 979.914 | 979.202 | 1001.947 | 1021.46 | 1018.869 | 1094.918 | 1097.098 | 1088.639 | 608.235 | 600.928 | 622.133 | 621.556 | 620.855 | 617.375 | 617.584 | 617.191 | NA | 609.64 | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit | ▁▂▂▁█▇▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅ | -2360.0 | -2013.0 | -1986.0 | -2438.0 | 832.0 | 596.0 | 492.0 | 467.0 | 544.824 | 520.936 | 517.62 | 330.78 | 285.316 | 275.676 | 248.845 | -176.37 | -188.701 | -214.859 | -255.804 | -360.459 | -394.418 | -426.731 | -437.029 | -479.6 | -507.215 | -537.253 | -545.82 | -625.484 | -657.787 | -684.534 | -696.996 | -684.47 | -705.846 | -708.748 | -713.697 | -680.092 | -694.296 | -714.74 | -734.511 | -747.793 | -757.319 | NA | -771.953 | NA | NA |
| us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax | ▅▇▂▁▁▇▇████████████████▄▄▄▄▇▇▇▇▅▅▅▅▅▅▅▅▆▆ | -5.0 | -2.0 | -10.0 | -11.0 | -11.0 | -2.0 | -2.0 | -1.0 | -0.784 | -0.784 | -0.784 | -1.423 | -1.423 | -1.423 | -1.423 | -0.807 | -0.807 | -0.807 | -0.807 | -0.834 | -0.834 | -0.834 | -0.834 | -6.277 | -6.287 | -6.371 | -6.455 | -2.693 | -1.869 | -2.514 | -2.553 | -5.109 | -5.071 | -5.032 | -4.993 | -4.602 | -4.659 | -4.744 | -4.848 | -3.792 | -3.833 | NA | -3.914 | NA | NA |
| us-gaap:MinorityInterest | ▄▅▅▄███▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂ | 72.0 | 93.0 | 89.0 | 60.0 | 202.0 | 197.0 | 192.0 | 180.0 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16.897 | 9.365 | 10.305 | 10.607 | 9.813 | 7.834 | 7.845 | NA | 8.341 | NA | NA |
| us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | ▆█▄▄▂▂▄▄▁▂▂▂▁▂▂▂▂▅▂▂▁▂▂▂▁▂▂▁▂▁▁▁▁▃▁▁▁▁▁▁▁ | 20.0 | 30.0 | 13.0 | 12.0 | 4.0 | 3.0 | 12.0 | 11.0 | 0.954 | 2.831 | 2.03 | 3.355 | 0.853 | 2.663 | 1.947 | 2.421 | 2.34 | 15.708 | 2.359 | 3.993 | 1.657 | 2.713 | 3.263 | 4.191 | -0.355 | 2.819 | 3.89 | 0.342 | 2.444 | 0.26 | 0.317 | 0.225 | 0.385 | 9.329 | 0.408 | 0.272 | 0.374 | 0.088 | -0.076 | 0.104 | 0.039 | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▄▁█▆▅▂▆▅▄▃▅▃▄▃▄▄▃▃▅▃▃▄▃▄▃▃▃▄▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃ | 194.0 | -206.0 | 709.0 | 505.0 | 373.0 | -39.0 | 422.0 | 271.309 | 123.016 | 99.675 | 274.513 | 116.207 | 155.755 | 100.943 | 152.693 | 136.929 | 71.84 | 69.642 | 261.506 | 120.602 | 75.643 | 134.015 | 89.207 | 133.472 | 66.397 | 111.619 | 72.057 | 178.413 | 43.724 | 136.26 | 9.938 | 97.269 | 3.668 | 49.702 | 74.171 | 83.029 | 12.792 | 67.483 | 20.163 | 60.563 | 12.83 | 54.957 | 48.026 | 47.196 | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ███████▁███████████████████▇██████▇█████████ | -115.0 | -26.0 | -61.0 | -27.0 | -48.0 | -23.0 | -53.0 | -9395.551 | -34.294 | -47.155 | -31.723 | -29.073 | -36.465 | -20.95 | -36.863 | -262.529 | -53.792 | 155.159 | -48.476 | -29.077 | -73.814 | -454.636 | -23.778 | -37.64 | -61.98 | -27.913 | -250.494 | -1115.556 | -29.34 | -1.966 | -494.499 | -430.106 | -111.694 | -14.942 | -540.021 | -52.867 | -355.436 | -200.96 | -54.714 | -32.123 | -17.187 | -8.224 | -0.548 | 4.702 | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▃▅▃▄▃▄▂▃▃▃▃▃▃▃█▁ | -19.0 | 12.0 | -21.0 | -1.0 | -32.0 | -11.0 | -54.0 | -19.402 | -34.395 | -37.203 | -24.504 | -32.031 | -34.15 | -25.234 | 95.358 | -74.296 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ███████▁████████ | -93.0 | -27.0 | -21.0 | 0.0 | -13.0 | -9.0 | 7.0 | -9353.231 | -1.955 | -1.814 | -1.368 | 5.187 | 0.038 | 7.052 | -147.594 | 122.293 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▇▇▁▇██▇██▇▇█████ | -4.0 | -2.0 | -41.0 | -1.0 | 0.0 | 0.0 | -4.0 | 0.299 | -0.399 | -1.9 | -0.82 | 2.197 | 1.094 | 1.339 | 2.694 | 1.623 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▅▄█▁▄▄▄▁▅▄▄▄▄▄▇▅ | 0.0 | -10.0 | 21.0 | -26.0 | -4.0 | -7.0 | -4.0 | -27.263 | -0.537 | -8.2 | -6.331 | -5.867 | -4.695 | -4.107 | 12.229 | -2.338 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▃▃▃█▄█▆▄▃▃▃▁▄▃ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 4.0 | 2.0 | 4.046 | 2.992 | 1.962 | 0.958 | 1.441 | 1.248 | 0.0 | 1.699 | 0.997 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▂▂▁▁▂▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂ | -56.0 | -85.0 | -19.0 | -467.0 | -1045.0 | 71.0 | -435.0 | 9594.534 | -135.031 | -137.503 | -206.942 | -78.876 | -141.361 | -37.638 | -36.697 | -68.254 | -37.701 | 330.915 | -57.591 | -90.707 | -39.626 | 312.173 | -34.846 | -41.022 | 2.319 | -43.545 | 96.769 | 640.947 | 63.351 | -96.587 | 535.671 | 11.019 | 633.013 | -31.8 | 444.09 | -16.615 | 346.92 | 147.312 | -13.849 | -17.883 | -68.94 | 55.4 | -67.001 | -52.795 | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▄▅▂▅▅▅▅▄▅▅▃▄▁▃▅█ | -207.0 | -120.0 | -366.0 | -166.0 | -127.0 | -143.0 | -148.0 | -183.916 | -139.966 | -133.118 | -281.767 | -174.532 | -410.89 | -257.012 | -148.824 | 67.297 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁ | 21.0 | -9.0 | 93.0 | -351.0 | -315.0 | -428.0 | -425.0 | 10335.927 | -74.886 | 11.959 | 35.808 | 20.597 | 35.803 | -10.592 | -6.194 | 13.681 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁▃▄▁▂█▂▂▂▂▂▂▂▁▁▂ | -3.0 | 20.0 | 45.0 | -8.0 | 9.0 | 115.0 | 5.0 | 3.503 | 0.815 | 1.682 | 1.031 | 4.938 | 1.406 | -2.643 | 0.36 | 6.012 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▆▅▆▅▁█▆▁▅▅▅▅▆▆▅▄ | 135.0 | 26.0 | 211.0 | 61.0 | -610.0 | 530.0 | 145.0 | -560.734 | 78.756 | -18.022 | 42.243 | 73.898 | 236.065 | 237.794 | 122.479 | -152.777 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▇▇▇▆▇▆▁███▆▆▆▅▅▆ | -2.0 | -2.0 | -2.0 | -3.0 | -2.0 | -3.0 | -12.0 | -0.246 | 0.25 | -0.004 | -3.663 | -3.777 | -3.745 | -5.185 | -5.464 | -2.468 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | ▅▃█▅▁▅▄▇▄▄▅▅▅▅▅▅▅█ | 23.0 | -317.0 | 629.0 | 11.0 | -720.0 | 9.0 | -66.0 | 470.292 | -46.309 | -84.983 | 35.848 | 8.258 | -22.071 | 42.355 | 79.444 | 116.953 | -20.851 | 560.21 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:DepreciationDepletionAndAmortization | ▆▇▆████▄▁▁▂▁▁▁ | 147.0 | 153.0 | 150.0 | 174.0 | 176.0 | 174.0 | 172.0 | 120.0 | 65.842 | 66.484 | 74.0 | 70.0 | 66.234 | 70.93 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncreaseDecreaseInAccountsReceivable | ▇▄▃█▁▃▄▃▅▄▄▆▅▄▆▄▅▄▄▅▇▄▆▄▅▄▆▄▅▄▆▅▅▅▅▄▅▄▅▄▅▄▅▄ | 96.0 | -6.0 | -46.0 | 124.0 | -114.0 | -34.0 | -7.0 | -57.514 | 10.501 | -15.987 | -11.243 | 44.952 | 29.475 | -26.504 | 44.075 | -28.462 | 27.838 | -1.543 | -5.4 | 30.876 | 73.16 | -26.918 | 39.229 | 2.87 | 16.186 | -19.619 | 61.629 | -10.214 | 10.336 | -17.498 | 53.276 | 9.235 | 14.266 | 13.858 | 33.026 | -8.825 | 7.394 | -8.37 | 15.07 | -4.183 | 8.308 | -7.579 | 15.248 | -6.674 | NA |
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▄▁█▆▅▂▆▅▄▃▅▃▄▃▄▄▃▃▅▃▃▄▃▄▃▃▃▄▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃ | 194.0 | -206.0 | 709.0 | 505.0 | 373.0 | -39.0 | 422.0 | 271.309 | 123.016 | 99.675 | 274.513 | 116.207 | 155.755 | 100.943 | 152.693 | 136.929 | 71.84 | 69.642 | 261.506 | 120.602 | 75.643 | 134.015 | 89.207 | 133.472 | 66.397 | 111.619 | 72.057 | 178.413 | 43.724 | 136.26 | 9.938 | 97.269 | 3.668 | 49.702 | 74.171 | 83.029 | 12.792 | 67.483 | 20.163 | 60.563 | 12.83 | 54.957 | 48.026 | 47.196 | NA |
| us-gaap:NetIncomeLoss | ▁█ | -332.0 | -12.0 | NA | -3256.0 | 252.0 | 123.0 | NA | -60.0 | 42.297 | 22.0 | NA | 64.0 | 28.041 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 18.579 | NA | NA | NA | 17.273 |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | █▁ | 117.0 | 89.0 | NA | 304.0 | 67.0 | 176.0 | NA | 203.0 | 119.196 | 91.0 | NA | 156.0 | 129.311 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁█ | -337.0 | -73.0 | NA | -3568.0 | 240.0 | 3.0 | NA | -105.0 | 0.151 | -3.0 | NA | -9.0 | -9.883 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁█ | -332.0 | -12.0 | NA | -3256.0 | 252.0 | 123.0 | NA | -60.0 | 42.297 | 22.0 | NA | 64.0 | 28.041 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | █▁ | 90.0 | 24.0 | NA | 314.0 | 14.0 | 124.0 | NA | 140.0 | 54.28 | 22.0 | NA | 70.0 | 35.122 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations | █▁ | 130.0 | -40.0 | NA | 2950.0 | -321.0 | -303.0 | NA | -238.0 | -173.627 | -110.0 | NA | -217.0 | -154.55 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss | ▆▇█▁█▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ | -328.0 | 26.0 | 514.0 | -3367.0 | 273.0 | 151.0 | 87.0 | -49.0 | 43.383 | 22.771 | 207.694 | 65.0 | 29.309 | 43.994 | 444.801 | 32.566 | 46.035 | 70.703 | 122.5 | 52.033 | 50.6 | 25.629 | 60.83 | 44.034 | 46.399 | 24.836 | 97.089 | 48.768 | 41.601 | 27.657 | 4.237 | 36.651 | 18.059 | 16.87 | 59.395 | 26.352 | 30.132 | 29.074 | 23.242 | 19.331 | 18.477 | 15.127 | 32.957 | 14.145 | 16.952 |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▂▁▅▅▁▃▃▃▂▁▄▂▂▃█▁▁ | 117.0 | 89.0 | 340.0 | 304.0 | 67.0 | 176.0 | 169.0 | 203.0 | 119.196 | 90.703 | 271.814 | 156.3 | 129.311 | 172.971 | 522.156 | 90.447 | 98.027 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▇▇█▁██▇▇█████▇███ | -333.0 | -35.0 | 240.0 | -3679.0 | 261.0 | 31.0 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▆▇█▁█▇▇▇▇▇█▇▇▇█▇▇ | -332.0 | -12.0 | 467.0 | -3256.0 | 252.0 | 123.0 | 43.0 | -60.0 | 42.297 | 21.672 | 206.201 | 63.875 | 28.041 | 43.123 | 443.53 | 30.637 | 44.645 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▂▁▅▆▁▃▃▃▂▁▄▂▁▂█▁▂ | 90.0 | 24.0 | 256.0 | 314.0 | 14.0 | 124.0 | 112.0 | 140.0 | 54.28 | 22.009 | 219.147 | 69.441 | 35.122 | 98.291 | 456.853 | 42.306 | 48.922 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▁█▂▂▂▂▂▃▂▂▂▂▁▃▂ | 130.0 | -40.0 | -789.0 | 2950.0 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -110.816 | -474.916 | -216.999 | -154.55 | -213.604 | -958.333 | -119.12 | -139.886 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ShareBasedCompensation | ▃█▄▃▃▄▂▂▃▃▂▂▂▂▁▁▂▂▁▁▁▂▁▁▂▂▁▁▁▂▁▁ | 10.0 | 33.0 | 13.0 | 10.0 | 12.0 | 17.0 | 7.0 | 6.364 | 8.817 | 10.819 | 5.684 | 7.092 | 6.784 | 6.956 | 2.981 | 1.457 | 3.877 | 7.571 | 3.469 | 3.501 | 3.641 | 6.328 | 3.537 | 3.201 | 4.52 | 7.057 | 2.863 | 3.003 | 3.661 | 4.769 | 2.252 | 1.525 | NA | NA | 1.099 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ███████▁███████████████████▇██████▇█████████ | -115.0 | -26.0 | -61.0 | -27.0 | -48.0 | -23.0 | -53.0 | -9395.551 | -34.294 | -47.155 | -31.723 | -29.073 | -36.465 | -20.95 | -36.863 | -262.529 | -53.792 | 155.159 | -48.476 | -29.077 | -73.814 | -454.636 | -23.778 | -37.64 | -61.98 | -27.913 | -250.494 | -1115.556 | -29.34 | -1.966 | -494.499 | -430.106 | -111.694 | -14.942 | -540.021 | -52.867 | -355.436 | -200.96 | -54.714 | -32.123 | -17.187 | -8.224 | -0.548 | 4.702 | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▃▅▃▄▃▄▂▃▃▃▃▃▃▃█▁ | -19.0 | 12.0 | -21.0 | -1.0 | -32.0 | -11.0 | -54.0 | -19.402 | -34.395 | -37.203 | -24.504 | -32.031 | -34.15 | -25.234 | 95.358 | -74.296 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ███████▁████████ | -93.0 | -27.0 | -21.0 | 0.0 | -13.0 | -9.0 | 7.0 | -9353.231 | -1.955 | -1.814 | -1.368 | 5.187 | 0.038 | 7.052 | -147.594 | 122.293 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▇▇▁▇██▇██▇▇█████ | -4.0 | -2.0 | -41.0 | -1.0 | 0.0 | 0.0 | -4.0 | 0.299 | -0.399 | -1.9 | -0.82 | 2.197 | 1.094 | 1.339 | 2.694 | 1.623 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▅▄█▁▄▄▄▁▅▄▄▄▄▄▇▅ | 0.0 | -10.0 | 21.0 | -26.0 | -4.0 | -7.0 | -4.0 | -27.263 | -0.537 | -8.2 | -6.331 | -5.867 | -4.695 | -4.107 | 12.229 | -2.338 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▃▃▃▃▃█▄█▆▄▃▃▃▁▄▃ | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 4.0 | 2.0 | 4.046 | 2.992 | 1.962 | 0.958 | 1.441 | 1.248 | 0.0 | 1.699 | 0.997 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:PaymentsToAcquirePropertyPlantAndEquipment | ▃▃▄▅▇▆█▅▅▄▄▄▄▃▄▃▂▃▄▃▄▄▃▄▄▄▄▅▃▂▃▂▂▂▂▂▂▂▂▂▃▂▁▁ | 18.0 | 20.0 | 27.0 | 33.0 | 51.0 | 46.0 | 60.0 | 34.405 | 32.587 | 29.008 | 27.443 | 25.35 | 30.049 | 22.219 | 28.349 | 21.956 | 12.733 | 20.774 | 25.864 | 18.815 | 23.935 | 25.851 | 18.945 | 25.414 | 23.414 | 23.648 | 23.307 | 31.564 | 14.68 | 11.907 | 14.612 | 11.61 | 9.684 | 7.482 | 13.829 | 11.684 | 11.737 | 6.736 | 9.041 | 6.138 | 14.571 | 6.085 | 1.896 | 5.136 | NA |
| us-gaap:PaymentsToAcquireInvestments | ▃▂▂▂▁▁▁█▁▁▁▁▁▁ | 115.0 | 49.0 | 54.0 | 37.0 | 23.0 | 25.0 | 25.0 | 383.406 | 17.869 | 25.725 | 18.0 | 11.404 | 10.846 | 7.75 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 1.195 | NA | NA | NA | NA | 0.091 | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▂▂▁▁▂▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂ | -56.0 | -85.0 | -19.0 | -467.0 | -1045.0 | 71.0 | -435.0 | 9594.534 | -135.031 | -137.503 | -206.942 | -78.876 | -141.361 | -37.638 | -36.697 | -68.254 | -37.701 | 330.915 | -57.591 | -90.707 | -39.626 | 312.173 | -34.846 | -41.022 | 2.319 | -43.545 | 96.769 | 640.947 | 63.351 | -96.587 | 535.671 | 11.019 | 633.013 | -31.8 | 444.09 | -16.615 | 346.92 | 147.312 | -13.849 | -17.883 | -68.94 | 55.4 | -67.001 | -52.795 | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:GuarantorSubsidiaries,srt:ReportableLegalEntities | ▄▅▂▅▅▅▅▄▅▅▃▄▁▃▅█ | -207.0 | -120.0 | -366.0 | -166.0 | -127.0 | -143.0 | -148.0 | -183.916 | -139.966 | -133.118 | -281.767 | -174.532 | -410.89 | -257.012 | -148.824 | 67.297 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:NonGuarantorSubsidiaries,srt:ReportableLegalEntities | ▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁ | 21.0 | -9.0 | 93.0 | -351.0 | -315.0 | -428.0 | -425.0 | 10335.927 | -74.886 | 11.959 | 35.808 | 20.597 | 35.803 | -10.592 | -6.194 | 13.681 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | ▁▃▄▁▂█▂▂▂▂▂▂▂▁▁▂ | -3.0 | 20.0 | 45.0 | -8.0 | 9.0 | 115.0 | 5.0 | 3.503 | 0.815 | 1.682 | 1.031 | 4.938 | 1.406 | -2.643 | 0.36 | 6.012 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:SubsidiaryIssuer,srt:ReportableLegalEntities | ▆▅▆▅▁█▆▁▅▅▅▅▆▆▅▄ | 135.0 | 26.0 | 211.0 | 61.0 | -610.0 | 530.0 | 145.0 | -560.734 | 78.756 | -18.022 | 42.243 | 73.898 | 236.065 | 237.794 | 122.479 | -152.777 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminations | ▇▇▇▆▇▆▁███▆▆▆▅▅▆ | -2.0 | -2.0 | -2.0 | -3.0 | -2.0 | -3.0 | -12.0 | -0.246 | 0.25 | -0.004 | -3.663 | -3.777 | -3.745 | -5.185 | -5.464 | -2.468 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProceedsFromIssuanceOfLongTermDebt | ▁▁▂▁▁▂▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▂▁▂▁▁▁▁▁▁▁▁▁▁▁ | 351.0 | 6.0 | 872.0 | 74.0 | 0.0 | 873.0 | 503.0 | 9452.491 | 0.509 | 0.0 | 0.974 | 1.327 | 1.653 | 0.363 | 0.756 | 2.952 | 0.0 | 163.089 | 13.6 | 403.757 | 8.705 | 598.85 | 3.406 | 14.628 | 356.987 | 7.866 | 439.23 | 958.766 | 96.839 | 5.885 | 1079.478 | 36.471 | 1061.216 | 101.128 | 631.548 | 60.573 | 370.652 | 184.482 | 15.384 | 3.398 | 4.618 | 128.333 | 250.874 | 24.031 | NA |
| us-gaap:PaymentsOfDividendsCommonStock | ▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁█▁▁▁▁▁▁▁ | 15.0 | 15.0 | 14.0 | 14.0 | 17.0 | 18.0 | 18.0 | 18.235 | 18.409 | 18.356 | 19.361 | 18.41 | 18.403 | 18.392 | 18.315 | 18.305 | 18.487 | 16.257 | 16.242 | 16.886 | 17.106 | 15.675 | 15.629 | 15.64 | 15.749 | 15.715 | 15.781 | 16.038 | 14.588 | 14.696 | 14.829 | 14.966 | 14.924 | 12.048 | 92.607 | 12.041 | 9.616 | 9.588 | 9.42 | 9.712 | 9.633 | 9.591 | NA | NA | NA |
| us-gaap:PaymentsForRepurchaseOfCommonStock | NA | NA | 0.0 | 82.0 | 85.0 | 176.0 | 20.0 | -0.034 | 20.049 | 104.985 | 174.985 | 45.904 | 0.0 | 0.0 | 0.0 | 30.287 | NA | NA | 35.119 | 89.917 | 11.247 | 0.0 | 0.0 | 21.02 | 0.0 | 7.803 | 24.719 | 26.067 | 0.0 | 82.371 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:PaymentsForRepurchaseOfCommonStock us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 0.0 | 82.0 | 85.0 | 176.0 | 20.0 | -0.034 | 20.049 | 104.985 | 174.985 | NA | NA | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
|---|
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 670000.0 | 662000.0 | 689000.0 | 750000.0 | 766000.0 | 765000.0 | 761000.0 | 760000.0 | 770000.0 | 769000.0 | 646000.0 | 655000.0 | 687000.0 | 691000.0 | 688000.0 | 688000.0 | 695000.0 | 695000.0 | 696000.0 | 705000.0 | 714000.0 | 713000.0 | 741000.0 | 739000.0 | 735000.0 | 529000.0 | 523000.0 | 523000.0 | 523000.0 | 522000.0 | 520000.0 | 520000.0 | 520000.0 | 503000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonClassA | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 |
| Value | 75 | 74 | 74 | 80 | 91 | 93 | 93 | 93 | 102 | 102 | 102 | 103 | 103 | 93 | 94 | 95 | 95 | 95 | 96 | 95 | 97 | 97 | 99 | 100 | 93 | 82 | 81 | 81 | 81 | 81 | 81 | 80 | 80 | 86 |
| Percentage of WeightedAverageNumberOfDilutedSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 |
| Value | 75 | 74 | 74 | 80 | 90 | 92 | 91 | 92 | 102 | 102 | 101 | 102 | 102 | 92 | 93 | 95 | 94 | 95 | 95 | 95 | 97 | 97 | 98 | 99 | 92 | 81 | 81 | 81 | 80 | 80 | 80 | 80 | 80 | 80 |
| Percentage of WeightedAverageNumberOfSharesOutstandingBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 |
| Value | 1802000.0 | 1703000.0 | 3456000.0 | 3019000.0 | 2814000.0 | 0 | 0 | 950000.0 | 1600000.0 | 1600000.0 | 500000.0 | 1150000.0 | 0 | 0 | 525000.0 | 525000.0 | 407480.0 | 200000.0 | 0 | 300000.0 | 0 | 0 | 0 | 0 | 0 | 1600000.0 | 1400000.0 | 1500000.0 | 1500000.0 | 1100000.0 | 1100000.0 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -4.41 | -0.16 | 6.32 | -43.53 | 3.13 | 1.36 | 0.47 | -0.65 | 0.46 | 0.23 | 2.12 | 0.63 | 0.27 | 0.42 | 4.36 | 0.3 | 0.43 | 0.62 | 1.34 | 0.54 | 0.52 | 0.25 | 0.62 | 0.46 | 0.48 | 0.26 | 0.99 | 0.5 | 0.43 | 0.27 | 0.02 | 0.37 | 0.19 | 0.21 | 0.73 | 0.33 | 0.37 | 0.36 | 0.28 | 0.24 | 0.23 | 0.19 | 0.41 | 0.18 | 0.22 |
| Percentage of EarningsPerShareBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -4.41 | -0.16 | 6.27 | -43.53 | 3.12 | 1.35 | 0.47 | -0.64 | 0.45 | 0.23 | 2.1 | 0.62 | 0.27 | 0.42 | 4.32 | 0.3 | 0.43 | 0.61 | 1.32 | 0.54 | 0.52 | 0.25 | 0.61 | 0.45 | 0.48 | 0.25 | 0.98 | 0.49 | 0.42 | 0.27 | 0.02 | 0.36 | 0.19 | 0.21 | 0.73 | 0.32 | 0.37 | 0.36 | 0.28 | 0.24 | 0.23 | 0.19 | 0.4 | 0.18 | 0.21 |
| Percentage of EarningsPerShareDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -335.0 | -4.0 | 468 | -3256.0 | 243 | 123 | 42 | -60.0 | 42 | 21 | 206 | 63 | 28 | 43 | 442 | 30 | 44 | 57 | 120 | 50 | 49 | 24 | 63 | 43 | 45 | 24 | 91 | 48 | 41 | 27 | 4.859 | 36 | 17 | 16 | 58 | 26 | 30 | 29 | 21 | 19 | 18 | 15 | 33 | 14 | 17 |
| Percentage of ComprehensiveIncomeNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.8 | -0.3 | 31.0 | -211.6 | 18.9 | 7.6 | 2.6 | -5.3 | 5.5 | 3.0 | 23.2 | 8.3 | 3.8 | 6.5 | 60.3 | 4.6 | 6.6 | 8.8 | 15.2 | 7.3 | 7.4 | 4.2 | 10.4 | 7.9 | 8.3 | 4.8 | 14.9 | 9.7 | 9.2 | 6.6 | 1.1 | 10.7 | 5.7 | 6.0 | 17.8 | 10.1 | 11.9 | 13.2 | 10.2 | 10.7 | 10.0 | 8.4 | 14.7 | 7.7 | 9.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -331.0 | 34 | 515 | -3367.0 | 264 | 151 | 86 | -49.0 | 43 | 22 | 208 | 65 | 29 | 43 | 444 | 32 | 46 | 70 | 122 | 52 | 50 | 25 | 66 | 44 | 46 | 24 | 93 | 48 | 42 | 27 | 6.793 | 36 | 18 | 16 | 59 | 26 | 30 | 29 | 22 | 19 | 18 | 15 | 33 | 14 | 17 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.5 | 2.3 | 34.1 | -218.8 | 20.6 | 9.4 | 5.3 | -4.4 | 5.6 | 3.2 | 23.3 | 8.5 | 4.0 | 6.6 | 60.5 | 4.9 | 6.8 | 10.9 | 15.4 | 7.5 | 7.6 | 4.4 | 10.8 | 8.0 | 8.4 | 4.9 | 15.2 | 9.8 | 9.3 | 6.7 | 1.6 | 10.8 | 5.7 | 6.0 | 17.9 | 10.1 | 11.9 | 13.0 | 10.4 | 10.7 | 9.9 | 8.3 | 14.6 | 7.6 | 9.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 117 | 89 | 340 | 304 | 67 | 176 | 169 | 203 | 119 | 90 | 271 | 156 | 129 | 172 | 522 | 90 | 98 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | -35.3 | 261.8 | 66.0 | -9.0 | 25.4 | 116.6 | 196.5 | -414.3 | 274.8 | 398.3 | 130.5 | 240.5 | 441.2 | 393.2 | 117.6 | 277.7 | 212.9 |
| Percentage of Revenues | 7.3 | 5.9 | 22.5 | 19.8 | 5.2 | 10.9 | 10.4 | 18.0 | 15.5 | 12.6 | 30.4 | 20.4 | 17.7 | 26.0 | 71.1 | 13.5 | 14.4 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 15.7 | 12.6 | 0.0 | 39.3 | 10.7 | 23.8 | 0.0 | 28.9 | 16.9 | 13.8 | 0.0 | 21.9 | 19.0 | 27.6 | 0.0 | 14.7 | 15.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -336.0 | -27.0 | 242 | -3679.0 | 252 | 31 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 101.5 | -79.4 | 47.0 | 109.3 | 95.5 | 20.5 | -25.6 | 191.8 | 2.8 | -3.5 | -6.9 | -11.7 | -29.4 | -129.1 | -4.3 | -35.9 | -12.3 |
| Percentage of Revenues | -20.8 | -1.8 | 16.0 | -239.1 | 19.6 | 1.9 | -1.4 | -8.4 | 0.2 | -0.1 | -1.6 | -1.0 | -1.2 | -8.5 | -2.6 | -1.7 | -0.8 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -37.9 | -3.3 | 0.0 | -468.1 | 37.6 | 3.5 | 0.0 | -21.1 | 1.4 | -1.0 | 0.0 | -9.9 | -12.0 | -97.9 | 0.0 | -24.5 | -11.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -332.0 | -12.0 | 467 | -3256.0 | 252 | 123 | 43 | -60.0 | 42 | 22 | 211 | 63 | 28 | 43 | 461 | 30 | 44 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 100.3 | -35.3 | 90.7 | 96.7 | 95.5 | 81.5 | 50.0 | 122.4 | 97.5 | 100.0 | 101.6 | 98.3 | 95.7 | 98.0 | 103.8 | 94.1 | 97.0 |
| Percentage of Revenues | -20.6 | -0.8 | 30.9 | -211.6 | 19.6 | 7.6 | 2.7 | -5.3 | 5.5 | 3.2 | 23.7 | 8.3 | 3.8 | 6.5 | 62.8 | 4.6 | 6.6 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 90 | 24 | 255 | 314 | 14 | 124 | 111 | 140 | 54 | 22 | 219 | 69 | 35 | 98 | 455 | 42 | 48 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | -27.2 | 70.6 | 49.5 | -9.3 | 5.3 | 82.1 | 129.1 | -285.7 | 125.1 | 96.7 | 105.2 | 106.8 | 119.8 | 223.4 | 102.6 | 129.9 | 106.3 |
| Percentage of Revenues | 5.6 | 1.6 | 16.9 | 20.4 | 1.1 | 7.7 | 6.8 | 12.4 | 7.0 | 3.0 | 24.5 | 9.1 | 4.8 | 14.8 | 62.1 | 6.3 | 7.2 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 321.4 | 88.9 | 0.0 | 1256.0 | 56.0 | 516.7 | 0.0 | 1555.6 | 0.0 | 550225.0 | 0.0 | 1157350.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 130 | -40.0 | -789.0 | 2950 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -111.915 | -480.312 | -216.999 | -154.55 | -213.604 | -975.808 | -119.12 | -139.886 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | -39.3 | -117.6 | -153.2 | -87.6 | -121.6 | -200.7 | -250.0 | 485.7 | -400.2 | -491.5 | -230.6 | -333.8 | -527.3 | -485.5 | -219.7 | -365.8 | -303.9 |
| Percentage of Revenues | 8.1 | -2.6 | -52.2 | 191.7 | -25.0 | -18.8 | -13.3 | -21.2 | -22.5 | -15.5 | -53.8 | -28.3 | -21.2 | -32.1 | -132.9 | -17.8 | -20.6 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | 0.0 | -6413.0 | 802.5 | 644.7 | 0.0 | 767.7 | 771.5 | 641.8 | 0.0 | 869.4 | 711.7 | 1164.6 | 0.0 | 660.9 | 665.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2018-09-30 | 2017-09-30 |
| Value | -63.0 | 123 | -2.0 | -2.0 | -25.379 | -4.362 |
| Percentage of GainLossOnInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -3.9 | 8.1 | -0.2 | -0.1 | -3.3 | -0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 7.0 | -4.0 | 10.0 | -12.0 |
| Percentage of GainLossOnInvestments | -11.1 | -3.3 | -500.0 | 600.0 |
| Percentage of Revenues | 0.4 | -0.3 | 0.8 | -0.7 |
| Percentage of Revenues us-gaap:VariableInterestEntityNotPrimaryBeneficiary | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-09-30 | 2019-06-30 |
| Value | -7.0 | -10.0 | -13.0 | -12.0 |
| Percentage of GainLossOnInvestments | 0.0 | 500.0 | 0.0 | 0.0 |
| Percentage of Revenues | -0.5 | -0.8 | -1.2 | -1.6 |
| Percentage of Revenues us-gaap:VariableInterestEntityNotPrimaryBeneficiary | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -15.0 | 0.0 | 3.0 | 2.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -1.4 | 0.0 | -23.699 | 0.0 | 0.0 | 0.0 | 0.0 | -42.138 | 0.0 | -16.283 | 0.0 | 0.0 | 0.0 | -0.335 | -0.328 | -0.117 | -3.478 | -0.924 | -1.889 | -3.939 | -0.149 |
| Percentage of GainsLossesOnExtinguishmentOfDebt | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -1.0 | 0.0 | 0.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.2 | 0.0 | -3.4 | 0.0 | 0.0 | 0.0 | 0.0 | -9.9 | 0.0 | -5.2 | 0.0 | 0.0 | 0.0 | -0.1 | -0.2 | -0.1 | -1.9 | -0.5 | -0.8 | -2.1 | -0.1 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 3.0 | 2.0 |
| Percentage of GainsLossesOnExtinguishmentOfDebt | 0.0 | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.2 | 0.1 |
| Percentage of Revenues sbgi:DSG6.625Notes us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 36 | 61 | 37 | 30 | 32 | 49 | 70 | 237 | 51 | 27 | 22 | 34 | 29 | 24 | 41 | 25 | 25 | 20 | 18 | 19 | 14 | 21 | 17 | 16 | 14 | 16 | 19 | 16 | 17 | 15 | 14 | 16 | 11 | 11 | 8.225 | 8.286 | 7.513 | 9.367 | 6.784 | 5.789 | 7.073 | 8.664 | 6.737 | 6.236 | 7.25 |
| Percentage of GeneralAndAdministrativeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 2.2 | 4.0 | 2.4 | 1.9 | 2.5 | 3.0 | 4.3 | 21.1 | 6.7 | 3.8 | 2.5 | 4.5 | 4.1 | 3.7 | 5.7 | 3.9 | 3.7 | 3.2 | 2.4 | 2.7 | 2.1 | 3.7 | 2.9 | 3.0 | 2.6 | 3.2 | 3.1 | 3.4 | 3.8 | 3.8 | 3.3 | 4.8 | 3.6 | 4.0 | 2.5 | 3.2 | 3.0 | 4.2 | 3.2 | 3.2 | 3.8 | 4.7 | 3.0 | 3.3 | 4.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 4.0 | 3.0 | 3.0 | 3.0 |
| Percentage of GeneralAndAdministrativeExpense | 11.1 | 4.9 | 9.4 | 6.1 |
| Percentage of Revenues | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Revenues sbgi:CorporateAndReconcilingItems | 3.3 | 2.8 | 2.9 | 2.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 29 | 55 | 24 | 25 | 27 | 44 | 62 | 23 | 33 |
| Percentage of GeneralAndAdministrativeExpense | 80.6 | 90.2 | 64.9 | 83.3 | 84.4 | 89.8 | 88.6 | 9.7 | 63.9 |
| Percentage of Revenues | 1.8 | 3.6 | 1.6 | 1.6 | 2.1 | 2.7 | 3.8 | 2.0 | 4.3 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:BroadcastSegment | 4.2 | 8.3 | 0.0 | 3.4 | 4.6 | 6.3 | 0.0 | 3.5 | 5.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 2.0 | 1.0 | 92 | 0.0 |
| Percentage of GeneralAndAdministrativeExpense | 8.3 | 4.9 | 8.1 | 10.0 | 6.2 | 4.1 | 1.4 | 38.8 | 0.0 |
| Percentage of Revenues | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 8.2 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:LocalSportsSegment | 0.4 | 0.4 | 0.0 | 0.4 | 0.3 | 0.2 | 0.0 | 26.1 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 10.0 | 2.0 | 3.0 | 3.0 | 7.0 | 123 | 19 | 2.0 |
| Percentage of GeneralAndAdministrativeExpense | 27.0 | 6.7 | 9.4 | 6.1 | 10.0 | 51.9 | 36.8 | 7.2 |
| Percentage of Revenues | 0.7 | 0.1 | 0.2 | 0.2 | 0.4 | 10.9 | 2.5 | 0.3 |
| Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther | 0.0 | 1.9 | 2.9 | 2.3 | 0.0 | 95.3 | 16.2 | 1.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -397.0 | 17 | 599 | -4214.0 | 327 | 139 | 79 | -144.0 | 46 | 27 | 193 | 62 | 26 | 28 | 298 | 49 | 70 | 99 | 178 | 79 | 77 | 37 | 71 | 51 | 69 | 41 | 149 | 56 | 64 | 42 | 22 | 35 | 22 | 25 | 84 | 45 | 48 | 33 | 36 | 30 | 30 | 23 | 50 | 19 | 27 |
| Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -24.6 | 1.1 | 39.6 | -273.8 | 25.5 | 8.6 | 4.9 | -12.8 | 6.0 | 3.8 | 21.7 | 8.1 | 3.6 | 4.3 | 40.7 | 7.4 | 10.4 | 15.3 | 22.4 | 11.4 | 11.6 | 6.5 | 11.7 | 9.3 | 12.6 | 8.2 | 24.3 | 11.4 | 14.2 | 10.3 | 5.3 | 10.3 | 7.2 | 9.0 | 25.6 | 17.6 | 19.1 | 15.2 | 17.1 | 16.8 | 16.5 | 12.9 | 22.4 | 10.4 | 14.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 514 | -3367.0 | 273 | 151 | 88 | -49.0 | 43 | 22 | 207 | 65 | 29 | 43 | 444 | 32 | 46 | 70 | 122 | 52 | 50 | 25 | 60 | 44 | 46 | 24 | 97 | 48 | 41 | 27 | 4.237 | 30 | 12 | 16 | 58 | 26 | 30 | 29 | 23 | 19 | 18 | 15 | 33 | 14 | 16 |
| Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 34.0 | -218.8 | 21.3 | 9.4 | 5.4 | -4.4 | 5.6 | 3.2 | 23.2 | 8.5 | 4.0 | 6.6 | 60.6 | 4.9 | 6.8 | 10.9 | 15.4 | 7.5 | 7.6 | 4.4 | 9.9 | 8.0 | 8.4 | 4.9 | 15.8 | 9.9 | 9.1 | 6.7 | 1.0 | 9.0 | 4.1 | 5.8 | 17.8 | 10.2 | 11.9 | 13.0 | 11.0 | 10.7 | 9.8 | 8.3 | 14.7 | 7.6 | 9.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -69.0 | -9.0 | 85 | -847.0 | 54 | -12.0 | -8.0 | -95.0 | 2.627 | 4.759 | -14.202 | -2.648 | -3.297 | -15.628 | -145.937 | 17 | 24 | 28 | 56 | 26 | 26 | 12 | 10 | 7.21 | 23 | 16 | 52 | 7.524 | 23 | 14 | 18 | 4.489 | 9.654 | 8.849 | 25 | 19 | 18 | 4.806 | 13 | 10 | 12 | 8.25 | 17 | 5.154 | 10 |
| Percentage of IncomeTaxExpenseBenefit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -4.3 | -0.6 | 5.6 | -55.0 | 4.2 | -0.7 | -0.5 | -8.4 | 0.3 | 0.7 | -1.6 | -0.3 | -0.5 | -2.3 | -19.9 | 2.6 | 3.7 | 4.4 | 7.1 | 3.9 | 4.0 | 2.1 | 1.8 | 1.3 | 4.2 | 3.3 | 8.5 | 1.5 | 5.1 | 3.6 | 4.3 | 1.3 | 3.1 | 3.1 | 7.8 | 7.4 | 7.2 | 2.1 | 6.1 | 6.0 | 6.7 | 4.5 | 7.7 | 2.8 | 5.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 0.0 | 15 | 21 | -64.0 | 34 | 6.0 | 24 | -43.0 | 23 | 16 | 3.969 | 24 | 17 | 15 | -112.888 | 46 | 51 |
| Percentage of IncomeTaxExpenseBenefit | -0.0 | -166.7 | 24.7 | 7.6 | 63.0 | -50.0 | -300.0 | 45.3 | 909.9 | 354.6 | -27.9 | -944.1 | -534.0 | -100.3 | 77.4 | 274.5 | 208.4 |
| Percentage of Revenues | 0.0 | 1.0 | 1.4 | -4.2 | 2.7 | 0.4 | 1.5 | -3.8 | 3.1 | 2.3 | 0.4 | 3.3 | 2.4 | 2.4 | -15.4 | 7.0 | 7.6 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.0 | 2.1 | 0.0 | -8.3 | 5.4 | 0.8 | 0.0 | -6.1 | 3.4 | 2.6 | 0.0 | 3.5 | 2.6 | 2.5 | 0.0 | 7.6 | 8.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -45.0 | 2.0 | 37 | -727.0 | 12 | 13 | 2.0 | -21.0 | 0.34 | -0.198 | 6.342 | 0.963 | 2.1 | -15.885 | -4.899 | -3.688 | -1.78 |
| Percentage of IncomeTaxExpenseBenefit | 65.2 | -22.2 | 43.5 | 85.8 | 22.2 | -108.3 | -25.0 | 22.1 | 12.9 | -4.2 | -44.7 | -36.4 | -63.7 | 101.6 | 3.4 | -21.5 | -7.2 |
| Percentage of Revenues | -2.8 | 0.1 | 2.4 | -47.2 | 0.9 | 0.8 | 0.1 | -1.9 | 0.0 | -0.0 | 0.7 | 0.1 | 0.3 | -2.4 | -0.7 | -0.5 | -0.3 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -5.1 | 0.2 | 0.0 | -92.5 | 1.8 | 1.5 | 0.0 | -4.7 | 0.4 | -0.2 | 0.0 | 1.3 | 2.9 | -27.4 | 0.0 | -7.7 | -3.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -2.0 | -19.0 | 3.0 | -1.0 | -1.0 | -2.0 | -1.0 | -27.0 | -4.245 | -0.284 | 0.225 | -0.95 | -0.948 | -0.021 | -2.782 | -0.817 | -0.546 |
| Percentage of IncomeTaxExpenseBenefit | 2.9 | 211.1 | 3.5 | 0.1 | -1.9 | 16.7 | 12.5 | 28.4 | -161.6 | -6.0 | -1.6 | 35.9 | 28.8 | 0.1 | 1.9 | -4.8 | -2.2 |
| Percentage of Revenues | -0.1 | -1.3 | 0.2 | -0.1 | -0.1 | -0.1 | -0.1 | -2.4 | -0.6 | -0.0 | 0.0 | -0.1 | -0.1 | -0.0 | -0.4 | -0.1 | -0.1 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -22.0 | -7.0 | 24 | -55.0 | 9.0 | -29.0 | -33.0 | -4.0 | -17.37 | -11.634 | -24.886 | -27.66 | -22.056 | -15.398 | -24.895 | -25.364 | -24.636 |
| Percentage of IncomeTaxExpenseBenefit | 31.9 | 77.8 | 28.2 | 6.5 | 16.7 | 241.7 | 412.5 | 4.2 | -661.2 | -244.5 | 175.2 | 1044.6 | 669.0 | 98.5 | 17.1 | -148.2 | -99.0 |
| Percentage of Revenues | -1.4 | -0.5 | 1.6 | -3.6 | 0.7 | -1.8 | -2.0 | -0.4 | -2.3 | -1.6 | -2.8 | -3.6 | -3.0 | -2.3 | -3.4 | -3.8 | -3.6 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | -78.6 | -25.9 | 0.0 | -220.0 | 36.0 | -120.8 | 0.0 | -44.4 | 0.0 | -290850.0 | 0.0 | -461000.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 160 | 151 | 154 | 157 | 165 | 180 | 185 | 129 | 53 | 54 | 54 | 75 | 92 | 69 | 52 | 51 | 50 | 57 | 54 | 53 | 53 | 49 | 48 | 48 | 47 | 46 | 47 | 47 | 40 | 39 | 39 | 39 | 45 | 37 | 36 | 35 | 29 | 27 | 27 | 24 | 24 | 29 | 27 | 31 | 28 |
| Percentage of InterestExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 9.9 | 10.0 | 10.2 | 10.2 | 12.9 | 11.2 | 11.4 | 11.5 | 7.0 | 7.6 | 6.1 | 9.9 | 12.6 | 10.5 | 7.1 | 7.7 | 7.5 | 8.8 | 6.8 | 7.7 | 8.1 | 8.5 | 7.9 | 8.9 | 8.6 | 9.2 | 7.7 | 9.7 | 8.8 | 9.6 | 9.3 | 11.8 | 14.5 | 13.3 | 11.1 | 13.5 | 11.6 | 12.2 | 13.0 | 13.5 | 13.2 | 16.0 | 12.1 | 16.8 | 15.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 1.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 3.5 | 0.5 |
| Percentage of InterestExpense | 0.6 | 1.3 | 1.3 | 1.3 | 1.2 | 1.1 | 1.9 | 0.4 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.0 |
| Percentage of Revenues sbgi:RegionalSportsNetworksAndFoxCollegeSportsRSNs sbgi:FixedPaymentObligations | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 0.0 | 1.0 | 0.0 | 1.0 | 1.0 | 1.0 | 2.0 | 1.0 | 0.889 | 1.049 | 0.97 | 1.029 | 0.989 | 0.972 | 1.029 | 1.013 | 1.425 |
| Percentage of InterestExpense | 0.0 | 0.7 | 0.0 | 0.6 | 0.6 | 0.6 | 1.1 | 0.8 | 1.7 | 1.9 | 1.8 | 1.4 | 1.1 | 1.4 | 2.0 | 2.0 | 2.8 |
| Percentage of Revenues | 0.0 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.0 | 0.1 | 0.0 | 0.1 | 0.2 | 0.1 | 0.0 | 0.1 | 0.1 | 0.2 | 0.0 | 0.1 | 0.1 | 0.2 | 0.0 | 0.2 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 113 | 111 | 113 | 114 | 120 | 127 | 131 | 76 | 4.136 | 4.456 | 4.549 | 4.74 | 4.643 | 4.55 | 4.903 | 4.968 | 4.149 |
| Percentage of InterestExpense | 70.6 | 73.5 | 73.4 | 72.6 | 72.7 | 70.6 | 70.8 | 58.9 | 7.7 | 8.2 | 8.4 | 6.3 | 5.0 | 6.5 | 9.4 | 9.6 | 8.1 |
| Percentage of Revenues | 7.0 | 7.3 | 7.5 | 7.4 | 9.4 | 7.9 | 8.1 | 6.8 | 0.5 | 0.6 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.6 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 12.8 | 13.6 | 0.0 | 14.5 | 17.9 | 14.2 | 0.0 | 17.1 | 4.7 | 5.4 | 0.0 | 6.2 | 6.5 | 7.8 | 0.0 | 10.4 | 8.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 4.0 | 3.0 | 3.0 | 3.0 | 4.0 | 3.0 | 3.0 | 1.0 | 0.163 | 0.0 | 0.0 | 0.0 | 0.001 | 0.0 | 0.007 | 0.01 | 0.034 |
| Percentage of InterestExpense | 2.5 | 2.0 | 1.9 | 1.9 | 2.4 | 1.7 | 1.6 | 0.8 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Percentage of Revenues | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 50 | 42 | 44 | 45 | 47 | 55 | 56 | 55 | 52 | 52 | 52 | 74 | 90 | 68 | 50 | 50 | 49 |
| Percentage of InterestExpense | 31.2 | 27.8 | 28.6 | 28.7 | 28.5 | 30.6 | 30.3 | 42.6 | 96.9 | 96.9 | 96.2 | 97.7 | 98.2 | 97.7 | 96.9 | 97.1 | 96.9 |
| Percentage of Revenues | 3.1 | 2.8 | 2.9 | 2.9 | 3.7 | 3.4 | 3.5 | 4.9 | 6.7 | 7.3 | 5.8 | 9.7 | 12.4 | 10.2 | 6.9 | 7.5 | 7.3 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 178.6 | 155.6 | 0.0 | 180.0 | 188.0 | 229.2 | 0.0 | 611.1 | 0.0 | 1323800.0 | 0.0 | 1233850.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 51 | 45 | 50 | 59 |
| Percentage of InterestExpense | 31.9 | 29.8 | 30.3 | 32.8 |
| Percentage of Revenues | 3.2 | 3.0 | 3.9 | 3.7 |
| Percentage of Revenues sbgi:CorporateAndReconcilingItems | 42.5 | 41.7 | 48.1 | 46.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -7.0 | -6.0 | -6.0 | -6.0 | -7.0 | -6.0 | -7.0 | -4.0 | -3.53 | -3.831 | -3.914 | -4.047 | -3.997 | -3.948 | -4.421 | -4.495 | -4.028 |
| Percentage of InterestExpense | -4.4 | -4.0 | -3.9 | -3.8 | -4.2 | -3.3 | -3.8 | -3.1 | -6.6 | -7.0 | -7.2 | -5.3 | -4.3 | -5.7 | -8.5 | -8.7 | -7.9 |
| Percentage of Revenues | -0.4 | -0.4 | -0.4 | -0.4 | -0.5 | -0.4 | -0.4 | -0.4 | -0.5 | -0.5 | -0.4 | -0.5 | -0.5 | -0.6 | -0.6 | -0.7 | -0.6 |
| Percentage of Revenues srt:ConsolidationEliminations | 15.2 | 15.4 | 0.0 | 13.0 | 17.5 | 12.8 | 0.0 | 12.9 | 15.7 | 22.0 | 0.0 | 16.2 | 18.4 | 21.5 | 0.0 | 24.9 | 19.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -2.0 | -3.0 | -3.0 | -4.0 | -3.0 | -3.0 | -3.0 | -3.0 | -3.0 | -4.0 |
| Percentage of InterestExpense | -1.2 | -2.0 | -1.9 | -2.5 | -1.8 | -1.7 | -1.6 | -2.3 | -5.6 | -7.3 |
| Percentage of Revenues | -0.1 | -0.2 | -0.2 | -0.3 | -0.2 | -0.2 | -0.2 | -0.3 | -0.4 | -0.6 |
| Percentage of Revenues us-gaap:IntersegmentElimination | 6.1 | 10.0 | 0.0 | 14.8 | 10.3 | 9.4 | 0.0 | 17.6 | 50.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 1.0 | 1.0 | 1.0 | 2.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Percentage of InterestExpense | 0.6 | 0.7 | 0.6 | 1.3 | 0.6 | 0.6 | 0.5 | 0.8 | 1.9 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:BroadcastSegment | 0.1 | 0.2 | 0.0 | 0.3 | 0.2 | 0.1 | 0.0 | 0.2 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 110 | 108 | 109 | 111 | 117 | 123 | 127 | 73 | 0.0 |
| Percentage of InterestExpense | 68.8 | 71.5 | 70.8 | 70.7 | 70.9 | 68.3 | 68.6 | 56.6 | 0.0 |
| Percentage of Revenues | 6.8 | 7.1 | 7.2 | 7.2 | 9.1 | 7.6 | 7.8 | 6.5 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:LocalSportsSegment | 13.1 | 14.1 | 0.0 | 15.3 | 19.0 | 15.1 | 0.0 | 20.7 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 47 | 48 | 50 | 59 | 60 | 58 | 56 | 57 |
| Percentage of InterestExpense | 30.5 | 30.6 | 30.3 | 32.8 | 32.4 | 45.0 | 104.3 | 104.3 |
| Percentage of Revenues | 3.1 | 3.1 | 3.9 | 3.7 | 3.7 | 5.2 | 7.3 | 7.9 |
| Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther | 0.0 | 45.7 | 48.1 | 46.1 | 0.0 | 45.0 | 47.9 | 53.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2011-06-30 | 2010-06-30 |
| Value | -332.0 | -12.0 | -3256.0 | 252 | 123 | -60.0 | 42 | 22 | 64 | 28 | 18 | 17 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | -0.8 | -211.6 | 19.6 | 7.6 | -5.3 | 5.5 | 3.0 | 8.4 | 3.8 | 10.0 | 9.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 117 | 89 | 304 | 67 | 176 | 203 | 119 | 91 | 156 | 129 |
| Percentage of NetIncomeLoss | -35.2 | -741.7 | -9.3 | 26.6 | 143.1 | -338.3 | 281.8 | 413.6 | 243.8 | 461.1 |
| Percentage of Revenues | 7.3 | 5.9 | 19.8 | 5.2 | 10.9 | 18.0 | 15.5 | 12.6 | 20.4 | 17.7 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 15.7 | 12.6 | 39.3 | 10.7 | 23.8 | 28.9 | 16.9 | 13.9 | 21.8 | 19.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | -337.0 | -73.0 | -3568.0 | 240 | 3.0 | -105.0 | 0.151 | -3.0 | -9.0 | -9.883 |
| Percentage of NetIncomeLoss | 101.5 | 608.3 | 109.6 | 95.2 | 2.4 | 175.0 | 0.4 | -13.6 | -14.1 | -35.2 |
| Percentage of Revenues | -20.9 | -4.8 | -231.8 | 18.7 | 0.2 | -9.3 | 0.0 | -0.4 | -1.2 | -1.4 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -38.0 | -8.9 | -453.9 | 35.8 | 0.3 | -23.6 | 0.2 | -3.6 | -11.7 | -13.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | -332.0 | -12.0 | -3256.0 | 252 | 123 | -60.0 | 42 | 22 | 64 | 28 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | -0.8 | -211.6 | 19.6 | 7.6 | -5.3 | 5.5 | 3.0 | 8.4 | 3.8 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 90 | 24 | 314 | 14 | 124 | 140 | 54 | 22 | 70 | 35 |
| Percentage of NetIncomeLoss | -27.1 | -200.0 | -9.6 | 5.6 | 100.8 | -233.3 | 128.3 | 100.0 | 109.4 | 125.3 |
| Percentage of Revenues | 5.6 | 1.6 | 20.4 | 1.1 | 7.7 | 12.4 | 7.0 | 3.0 | 9.1 | 4.8 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 321.4 | 88.9 | 1256.0 | 56.0 | 516.7 | 1555.6 | 0.0 | 550000.0 | 1166666.7 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 130 | -40.0 | 2950 | -321.0 | -303.0 | -238.0 | -173.627 | -110.0 | -217.0 | -154.55 |
| Percentage of NetIncomeLoss | -39.2 | 333.3 | -90.6 | -127.4 | -246.3 | 396.7 | -410.5 | -500.0 | -339.1 | -551.2 |
| Percentage of Revenues | 8.1 | -2.6 | 191.7 | -25.0 | -18.8 | -21.2 | -22.5 | -15.2 | -28.3 | -21.2 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | -6413.0 | 802.5 | 644.7 | 767.7 | 771.5 | 630.8 | 869.4 | 711.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | -332.0 | -12.0 | 467 | -3256.0 | 252 | 123 | 44 | -60.0 | 42 | 21 | 206 | 63 | 28 | 43 | 443 | 30 | 44 | 57 | 120 | 50 | 49 | 24 | 58 | 43 | 45 | 24 | 95 | 48 | 41 | 27 | 2.303 | 36 | 17 | 16 | 59 | 26 | 30 | 29 | 22 | 19 | 18 | 15 | 33 | 14 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | -0.8 | 30.9 | -211.6 | 19.6 | 7.6 | 2.7 | -5.3 | 5.5 | 3.0 | 23.1 | 8.3 | 3.8 | 6.5 | 60.4 | 4.6 | 6.6 | 8.8 | 15.2 | 7.3 | 7.4 | 4.2 | 9.5 | 7.9 | 8.3 | 4.8 | 15.5 | 9.8 | 9.1 | 6.6 | 0.5 | 10.7 | 5.7 | 6.0 | 17.9 | 10.1 | 11.9 | 13.1 | 10.7 | 10.6 | 10.0 | 8.4 | 14.6 | 7.7 |
| Period End | 2021-06-30 | 2020-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | -332.0 | 252 | 21 | 206 | 63 | 28 | 43 | 443 | 30 | 44 | 57 | 120 | 50 | 49 | 24 | 58 | 43 | 45 | 24 | 95 | 48 | 41 | 27 | 2.303 | 36 | 17 | 17 | 59 | 26 | 30 | 29 | 22 | 19 | 18 |
| Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | 19.6 | 3.0 | 23.1 | 8.3 | 3.8 | 6.5 | 60.4 | 4.6 | 6.6 | 8.8 | 15.2 | 7.3 | 7.4 | 4.2 | 9.5 | 7.9 | 8.3 | 4.8 | 15.5 | 9.8 | 9.1 | 6.6 | 0.5 | 10.7 | 5.7 | 6.0 | 17.9 | 10.1 | 11.9 | 13.1 | 10.7 | 10.7 | 10.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -219.0 | -18.0 | -26.0 | 2.0 | -165.0 | -188.0 | -198.0 | -138.0 | -59.989 | -66.068 | -69.462 | -95.458 | -105.57 | -78.948 | -58.718 | -53.763 | -47.934 | -58.347 | -54.589 | -74.975 | -51.869 | -48.53 | -52.69 | -48.362 | -44.607 | -43.284 | -59.846 | -45.371 | -38.364 | -38.523 | -80.742 | -37.808 | -61.67 | -38.292 | -34.678 | -32.828 | -23.457 | -25.975 | -27.451 | -21.917 | -26.706 | -27.992 | -31.176 | -36.728 | -28.766 |
| Percentage of NonoperatingIncomeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -13.6 | -1.2 | -1.7 | 0.1 | -12.9 | -11.7 | -12.2 | -12.3 | -7.8 | -9.1 | -7.8 | -12.5 | -14.5 | -11.9 | -8.0 | -8.0 | -7.1 | -9.0 | -6.8 | -10.8 | -7.8 | -8.4 | -8.6 | -8.8 | -8.0 | -8.6 | -9.7 | -9.2 | -8.4 | -9.3 | -18.9 | -11.2 | -19.6 | -13.5 | -10.5 | -12.6 | -9.3 | -11.6 | -12.9 | -12.1 | -14.3 | -15.3 | -13.8 | -19.7 | -15.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -10.0 | -13.0 | -11.0 | -12.0 | -11.0 | -10.0 | -20.0 | -13.0 | -12.618 | -12.72 | -15.596 | -16.688 | -15.519 | -13.904 | -3.021 | -3.572 | -3.227 |
| Percentage of NonoperatingIncomeExpense | 4.6 | 72.2 | 42.3 | -600.0 | 6.7 | 5.3 | 10.1 | 9.4 | 21.0 | 19.3 | 22.5 | 17.5 | 14.7 | 17.6 | 5.1 | 6.6 | 6.7 |
| Percentage of Revenues | -0.6 | -0.9 | -0.7 | -0.8 | -0.9 | -0.6 | -1.2 | -1.2 | -1.6 | -1.8 | -1.7 | -2.2 | -2.1 | -2.1 | -0.4 | -0.5 | -0.5 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | -1.3 | -1.8 | 0.0 | -1.6 | -1.8 | -1.4 | 0.0 | -1.9 | -1.8 | -1.9 | 0.0 | -2.3 | -2.3 | -2.2 | 0.0 | -0.6 | -0.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -84.0 | 12 | 10.0 | 54 | -116.0 | -119.0 | -112.0 | -70.0 | -3.858 | -5.608 | -4.468 | -3.325 | -7.495 | -3.371 | -13.239 | -6.092 | -1.08 |
| Percentage of NonoperatingIncomeExpense | 38.4 | -66.7 | -38.5 | 2700.0 | 70.3 | 63.3 | 56.6 | 50.7 | 6.4 | 8.5 | 6.4 | 3.5 | 7.1 | 4.3 | 22.5 | 11.3 | 2.3 |
| Percentage of Revenues | -5.2 | 0.8 | 0.7 | 3.5 | -9.0 | -7.4 | -6.9 | -6.2 | -0.5 | -0.8 | -0.5 | -0.4 | -1.0 | -0.5 | -1.8 | -0.9 | -0.2 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -9.5 | 1.5 | 0.0 | 6.9 | -17.3 | -13.3 | 0.0 | -15.7 | -4.3 | -6.7 | 0.0 | -4.3 | -10.4 | -5.8 | 0.0 | -12.8 | -2.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -330.0 | -28.0 | 481 | -3254.0 | 254 | 124 | 46 | 35 | 57 | 23 | 208 | 65 | 29 | 45 | 444 | 32 | 46 |
| Percentage of NonoperatingIncomeExpense | 150.7 | 155.6 | -1850.0 | -162700.0 | -153.9 | -66.0 | -23.2 | -25.4 | -95.4 | -35.7 | -300.4 | -68.7 | -28.4 | -57.9 | -757.1 | -59.7 | -97.3 |
| Percentage of Revenues | -20.5 | -1.9 | 31.8 | -211.4 | 19.8 | 7.7 | 2.8 | 3.1 | 7.4 | 3.3 | 23.4 | 8.6 | 4.1 | 6.9 | 60.6 | 4.8 | 6.9 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 75 | 51 | 284 | 262 | 28 | 116 | 101 | 145 | 70 | 37 | 215 | 74 | 40 | 105 | 471 | 42 | 48 |
| Percentage of NonoperatingIncomeExpense | -34.2 | -283.3 | -1092.3 | 13100.0 | -17.0 | -61.7 | -51.0 | -105.1 | -118.0 | -56.5 | -310.6 | -78.1 | -38.6 | -134.1 | -802.3 | -78.2 | -100.9 |
| Percentage of Revenues | 4.7 | 3.4 | 18.8 | 17.0 | 2.2 | 7.2 | 6.2 | 12.9 | 9.2 | 5.2 | 24.2 | 9.7 | 5.6 | 15.9 | 64.2 | 6.3 | 7.1 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 267.9 | 188.9 | 0.0 | 1048.0 | 112.0 | 483.3 | 0.0 | 1611.1 | 0.0 | 933475.0 | 0.0 | 1242483.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 130 | -40.0 | -790.0 | 2952 | -320.0 | -299.0 | -213.0 | -235.0 | -171.523 | -108.687 | -473.996 | -215.591 | -153.327 | -213.288 | -957.719 | -118.26 | -138.592 |
| Percentage of NonoperatingIncomeExpense | -59.4 | 222.2 | 3038.5 | 147600.0 | 193.9 | 159.0 | 107.6 | 170.3 | 285.9 | 164.5 | 682.4 | 225.8 | 145.2 | 270.2 | 1631.0 | 220.0 | 289.1 |
| Percentage of Revenues | 8.1 | -2.6 | -52.2 | 191.8 | -24.9 | -18.6 | -13.1 | -20.9 | -22.3 | -15.1 | -53.1 | -28.1 | -21.0 | -32.1 | -130.5 | -17.6 | -20.4 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | 0.0 | -6417.4 | 800.0 | 636.2 | 0.0 | 758.1 | 762.2 | 623.2 | 0.0 | 863.7 | 706.0 | 1162.8 | 0.0 | 656.1 | 659.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 1790 | 1476 | 887 | 5755 | 791 | 1282 | 1345 | 1131 | 664 | 628 | 630 | 608 | 598 | 558 | 376 | 567 | 560 | 492 | 564 | 539 | 537 | 492 | 487 | 448 | 439 | 420 | 404 | 393 | 352 | 331 | 324 | 265 | 229 | 218 | 205 | 181 | 181 | 163 | 149 | 128 | 129 | 131 | 144 | 130 | 127 |
| Percentage of OperatingExpenses | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 111.0 | 97.7 | 58.7 | 373.9 | 61.7 | 79.7 | 82.9 | 100.5 | 86.2 | 87.0 | 70.6 | 79.4 | 82.0 | 83.9 | 51.3 | 84.6 | 82.5 | 75.7 | 70.7 | 77.8 | 80.6 | 85.1 | 79.7 | 81.8 | 79.4 | 83.3 | 66.0 | 79.5 | 77.4 | 80.4 | 75.9 | 78.5 | 73.2 | 77.5 | 62.5 | 69.8 | 71.6 | 73.2 | 70.2 | 71.1 | 69.2 | 71.8 | 63.8 | 69.9 | 69.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 617 | 588 | 569 | 522 | 515 | 547 | 564 | 529 | 548 | 536 | 544 | 516 | 517 | 423 | 261 | 473 | 469 |
| Percentage of OperatingExpenses | 34.5 | 39.8 | 64.1 | 9.1 | 65.1 | 42.7 | 41.9 | 46.8 | 82.6 | 85.3 | 86.3 | 84.9 | 86.5 | 75.8 | 69.5 | 83.5 | 83.9 |
| Percentage of Revenues | 38.3 | 38.9 | 37.6 | 33.9 | 40.1 | 34.0 | 34.8 | 47.0 | 71.2 | 74.2 | 60.9 | 67.4 | 70.9 | 63.6 | 35.7 | 70.6 | 69.2 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 82.9 | 83.4 | 0.0 | 67.4 | 82.1 | 74.0 | 0.0 | 75.4 | 77.9 | 81.7 | 0.0 | 72.3 | 76.1 | 67.6 | 0.0 | 77.1 | 75.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 1180 | 863 | 329 | 5246 | 282 | 730 | 779 | 490 | 83 | 78 | 90 | 80 | 70 | 127 | 72 | 56 | 56 |
| Percentage of OperatingExpenses | 65.9 | 58.5 | 37.1 | 91.2 | 35.7 | 56.9 | 57.9 | 43.3 | 12.5 | 12.5 | 14.3 | 13.2 | 11.8 | 22.8 | 19.2 | 10.0 | 10.1 |
| Percentage of Revenues | 73.2 | 57.1 | 21.8 | 340.9 | 22.0 | 45.4 | 48.0 | 43.6 | 10.8 | 10.9 | 10.1 | 10.5 | 9.7 | 19.1 | 9.8 | 8.5 | 8.3 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 133.2 | 105.5 | 0.0 | 667.4 | 42.0 | 81.7 | 0.0 | 110.1 | 93.9 | 94.5 | 0.0 | 104.3 | 98.6 | 219.5 | 0.0 | 119.5 | 112.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 4.0 | 3.0 | 11 | 3.0 | 3.0 | 3.0 | 4.0 | 122 | 19 | 2.22 | 2.217 | 2.672 | 2.893 | 2.616 | 3.835 | 2.274 | 2.517 |
| Percentage of OperatingExpenses | 0.2 | 0.2 | 1.2 | 0.1 | 0.4 | 0.2 | 0.3 | 10.8 | 2.9 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 1.0 | 0.4 | 0.4 |
| Percentage of Revenues | 0.2 | 0.2 | 0.7 | 0.2 | 0.2 | 0.2 | 0.2 | 10.8 | 2.5 | 0.3 | 0.2 | 0.3 | 0.4 | 0.4 | 0.5 | 0.3 | 0.4 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 35 | 61 | 30 | 28 | 30 | 45 | 48 | 18 | 33 | 26 | 21 | 32 | 27 | 23 | 39 | 25 | 24 |
| Percentage of OperatingExpenses | 2.0 | 4.1 | 3.4 | 0.5 | 3.8 | 3.5 | 3.6 | 1.6 | 5.1 | 4.3 | 3.4 | 5.4 | 4.6 | 4.1 | 10.4 | 4.4 | 4.3 |
| Percentage of Revenues | 2.2 | 4.0 | 2.0 | 1.8 | 2.3 | 2.8 | 3.0 | 1.6 | 4.4 | 3.7 | 2.4 | 4.3 | 3.8 | 3.5 | 5.3 | 3.7 | 3.5 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 125.0 | 225.9 | 0.0 | 112.0 | 120.0 | 187.5 | 0.0 | 200.0 | 0.0 | 674200.0 | 0.0 | 546233.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -46.0 | -39.0 | -52.0 | -44.0 | -39.0 | -43.0 | -50.0 | -28.0 | -20.414 | -15.31 | -27.681 | -23.552 | -20.494 | -18.026 | -22.072 | -17.165 | -19.717 |
| Percentage of OperatingExpenses | -2.6 | -2.6 | -5.9 | -0.8 | -4.9 | -3.4 | -3.7 | -2.5 | -3.1 | -2.4 | -4.4 | -3.9 | -3.4 | -3.2 | -5.9 | -3.0 | -3.5 |
| Percentage of Revenues | -2.9 | -2.6 | -3.4 | -2.9 | -3.0 | -2.7 | -3.1 | -2.5 | -2.6 | -2.1 | -3.1 | -3.1 | -2.8 | -2.7 | -3.0 | -2.6 | -2.9 |
| Percentage of Revenues srt:ConsolidationEliminations | 100.0 | 100.0 | 0.0 | 95.7 | 97.5 | 91.5 | 0.0 | 90.3 | 90.7 | 87.8 | 0.0 | 94.4 | 94.4 | 98.3 | 0.0 | 95.2 | 93.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -178.0 | 35 | 625 | -4216.0 | 492 | 327 | 277 | -6.0 | 105 | 93 | 262 | 157 | 131 | 107 | 357 | 103 | 118 | 157 | 233 | 153 | 129 | 86 | 124 | 99 | 114 | 84 | 208 | 101 | 103 | 81 | 103 | 72 | 84 | 63 | 119 | 78 | 71 | 59 | 63 | 52 | 57 | 51 | 81 | 56 | 55 |
| Percentage of OperatingIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -11.0 | 2.3 | 41.3 | -273.9 | 38.3 | 20.3 | 17.1 | -0.5 | 13.8 | 13.0 | 29.4 | 20.6 | 18.0 | 16.1 | 48.7 | 15.4 | 17.5 | 24.3 | 29.3 | 22.2 | 19.4 | 14.9 | 20.3 | 18.2 | 20.6 | 16.7 | 34.0 | 20.5 | 22.6 | 19.6 | 24.1 | 21.5 | 26.8 | 22.5 | 36.1 | 30.2 | 28.4 | 26.8 | 29.8 | 28.9 | 30.8 | 28.2 | 36.2 | 30.1 | 30.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 127 | 117 | 372 | 252 | 112 | 192 | 213 | 173 | 155 | 120 | 291 | 197 | 162 | 202 | 412 | 141 | 153 |
| Percentage of OperatingIncomeLoss | -71.3 | 334.3 | 59.5 | -6.0 | 22.8 | 58.7 | 76.9 | -2883.3 | 146.9 | 128.5 | 110.8 | 125.5 | 123.4 | 188.7 | 115.3 | 136.3 | 128.8 |
| Percentage of Revenues | 7.9 | 7.7 | 24.6 | 16.4 | 8.7 | 11.9 | 13.1 | 15.4 | 20.2 | 16.7 | 32.6 | 25.8 | 22.2 | 30.4 | 56.2 | 21.0 | 22.5 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 17.1 | 16.6 | 0.0 | 32.6 | 17.9 | 26.0 | 0.0 | 24.6 | 22.1 | 18.3 | 0.0 | 27.7 | 23.9 | 32.4 | 0.0 | 22.9 | 24.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -294.0 | -45.0 | 267 | -4460.0 | 389 | 163 | 92 | -45.0 | 5.421 | 4.613 | -3.583 | -3.329 | 0.98 | -69.301 | -10.948 | -9.3 | -6.373 |
| Percentage of OperatingIncomeLoss | 165.2 | -128.6 | 42.7 | 105.8 | 79.1 | 49.8 | 33.2 | 750.0 | 5.1 | 4.9 | -1.4 | -2.1 | 0.7 | -64.6 | -3.1 | -9.0 | -5.4 |
| Percentage of Revenues | -18.2 | -3.0 | 17.7 | -289.8 | 30.3 | 10.1 | 5.7 | -4.0 | 0.7 | 0.6 | -0.4 | -0.4 | 0.1 | -10.4 | -1.5 | -1.4 | -0.9 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -33.2 | -5.5 | 0.0 | -567.4 | 58.0 | 18.3 | 0.0 | -10.1 | 6.1 | 5.5 | 0.0 | -4.3 | 1.4 | -119.5 | 0.0 | -19.5 | -12.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -4.0 | -3.0 | -11.0 | -3.0 | -3.0 | -3.0 | -4.0 | -122.0 | -19.151 | -2.22 | -2.217 | -2.672 | -2.893 | -2.616 | -3.835 | -2.274 | -2.517 |
| Percentage of OperatingIncomeLoss | 2.2 | -8.6 | -1.8 | 0.1 | -0.6 | -0.9 | -1.4 | 2033.3 | -18.1 | -2.4 | -0.8 | -1.7 | -2.2 | -2.4 | -1.1 | -2.2 | -2.1 |
| Percentage of Revenues | -0.2 | -0.2 | -0.7 | -0.2 | -0.2 | -0.2 | -0.2 | -10.8 | -2.5 | -0.3 | -0.2 | -0.3 | -0.4 | -0.4 | -0.5 | -0.3 | -0.4 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -7.0 | -34.0 | -4.0 | -3.0 | -5.0 | -21.0 | -22.0 | -9.0 | -33.897 | -26.964 | -21.508 | -32.768 | -27.719 | -23.004 | -39.13 | -25.125 | -24.063 |
| Percentage of OperatingIncomeLoss | 3.9 | -97.1 | -0.6 | 0.1 | -1.0 | -6.4 | -7.9 | 150.0 | -32.0 | -28.8 | -8.2 | -20.8 | -21.1 | -21.4 | -10.9 | -24.3 | -20.2 |
| Percentage of Revenues | -0.4 | -2.3 | -0.3 | -0.2 | -0.4 | -1.3 | -1.4 | -0.8 | -4.4 | -3.7 | -2.4 | -4.3 | -3.8 | -3.5 | -5.3 | -3.7 | -3.5 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | -25.0 | -125.9 | 0.0 | -12.0 | -20.0 | -87.5 | 0.0 | -100.0 | 0.0 | -674100.0 | 0.0 | -546133.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 4.0 | 13 | 12 | 19 |
| Percentage of OperatingIncomeLoss | -2.2 | 37.1 | 2.4 | 5.8 |
| Percentage of Revenues | 0.2 | 0.9 | 0.9 | 1.2 |
| Percentage of Revenues sbgi:CorporateAndReconcilingItems | 3.3 | 12.0 | 11.5 | 14.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 1.0 | -2.0 | -1.0 | -4.0 | -2.0 | -3.0 | -2.09 | -2.129 | -0.92 | -1.408 | -1.223 | -0.316 | -0.614 | -0.86 | -1.294 |
| Percentage of OperatingIncomeLoss | 0.2 | 0.0 | -0.2 | -1.2 | -0.7 | 50.0 | -2.0 | -2.3 | -0.3 | -0.9 | -0.9 | -0.3 | -0.2 | -0.8 | -1.1 |
| Percentage of Revenues | 0.1 | -0.1 | -0.1 | -0.2 | -0.1 | -0.3 | -0.3 | -0.3 | -0.1 | -0.2 | -0.2 | -0.0 | -0.1 | -0.1 | -0.2 |
| Percentage of Revenues srt:ConsolidationEliminations | 0.0 | 4.3 | 2.5 | 8.5 | 0.0 | 9.7 | 9.3 | 12.2 | 0.0 | 5.6 | 5.6 | 1.7 | 0.0 | 4.8 | 6.2 |
| Period End | 2021-06-30 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 1.0 | -1.0 | 3.0 | -2.0 | -9.0 | -1.0 | -2.0 | -3.0 | -3.0 |
| Percentage of OperatingIncomeLoss | -0.6 | -0.2 | -0.1 | -0.4 | -2.8 | -0.4 | 33.3 | -2.8 | -3.2 |
| Percentage of Revenues | 0.1 | -0.1 | 0.2 | -0.2 | -0.6 | -0.1 | -0.2 | -0.4 | -0.4 |
| Percentage of Revenues us-gaap:IntersegmentElimination | -3.0 | 0.0 | -11.1 | 6.9 | 28.1 | 0.0 | 11.8 | 50.0 | 75.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 105 | 63 | 334 | 221 | 83 | 152 | 162 | 154 | 135 |
| Percentage of OperatingIncomeLoss | -59.0 | 180.0 | 53.4 | -5.2 | 16.9 | 46.5 | 58.5 | -2566.7 | 127.4 |
| Percentage of Revenues | 6.5 | 4.2 | 22.1 | 14.4 | 6.5 | 9.4 | 10.0 | 13.7 | 17.5 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:BroadcastSegment | 15.3 | 9.5 | 0.0 | 30.1 | 14.0 | 21.7 | 0.0 | 23.3 | 20.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | -288.0 | -41.0 | 283 | -4450.0 | 399 | 165 | 86 | -56.0 | 0.0 |
| Percentage of OperatingIncomeLoss | 161.8 | -117.1 | 45.3 | 105.6 | 81.1 | 50.5 | 31.0 | 933.3 | 0.0 |
| Percentage of Revenues | -17.9 | -2.7 | 18.7 | -289.1 | 31.1 | 10.3 | 5.3 | -5.0 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:LocalSportsSegment | -34.4 | -5.3 | 0.0 | -612.1 | 64.8 | 20.3 | 0.0 | -15.9 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 9.0 | 10.0 | 12 | 19 | 30 | -102.0 | -26.0 | 2.0 |
| Percentage of OperatingIncomeLoss | 1.4 | -0.2 | 2.4 | 5.8 | 10.8 | 1700.0 | -24.5 | 2.1 |
| Percentage of Revenues | 0.6 | 0.6 | 0.9 | 1.2 | 1.8 | -9.1 | -3.4 | 0.3 |
| Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther | 0.0 | 9.5 | 11.5 | 14.8 | 0.0 | -79.1 | -22.2 | 1.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-03-31 |
| Value | -3000000.0 | 8000000.0 | 1000000.0 | 0 | -9000000.0 | 5443000.0 | 10000.0 | 84000.0 | 84000.0 | -3762000.0 | -278000.0 | 645000.0 | 39000.0 | -39000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -0.2 | 0.5 | 0.1 | 0.0 | -0.7 | 0.9 | 0.0 | 0.0 | 0.0 | -0.6 | -0.1 | 0.1 | 0.0 | -0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-03-31 |
| Value | -3000000.0 | 8000000.0 | 1000000.0 | 0 | -9000000.0 | 5443000.0 | 10000.0 | 84000.0 | 84000.0 | -3762000.0 | -278000.0 | 645000.0 | 39000.0 | -39000.0 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -0.2 | 0.5 | 0.1 | 0.0 | -0.7 | 0.9 | 0.0 | 0.0 | 0.0 | -0.6 | -0.1 | 0.1 | 0.0 | -0.0 |
| Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -61.0 | 124 | 156 | 169 | 4.0 | -4.0 | -6.0 | 3.0 | 5.533 | 2.195 | -9.76 | 5.674 | 4.184 | 3.271 | 3.275 | 2.342 | 1.563 | 1.696 | 0.789 | 0.789 | 1.104 | 0.462 | 0.32 | -0.048 | 1.05 | 0.218 | 2.415 | 0.651 | 1.015 | 0.917 | 0.599 | 0.488 | 0.482 | 0.457 | 0.5 | 0.547 | 0.705 | 0.452 | 0.059 | 0.583 | 0.585 | 0.365 | 0.098 | 0.557 | 0.539 |
| Percentage of OtherNonoperatingIncomeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -3.8 | 8.2 | 10.3 | 11.0 | 0.3 | -0.2 | -0.4 | 0.3 | 0.7 | 0.3 | -1.1 | 0.7 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.3 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | -0.0 | 0.2 | 0.0 | 0.4 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.0 | 0.3 | 0.3 | 0.2 | 0.0 | 0.3 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -328.0 | 26 | 514 | -3367.0 | 273 | 151 | 87 | -49.0 | 43 | 22 | 207 | 65 | 29 | 43 | 444 | 32 | 46 | 70 | 122 | 52 | 50 | 25 | 60 | 44 | 46 | 24 | 97 | 48 | 41 | 27 | 4.237 | 36 | 18 | 16 | 59 | 26 | 30 | 29 | 23 | 19 | 18 | 15 | 32 | 14 | 16 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.3 | 1.7 | 34.0 | -218.8 | 21.3 | 9.4 | 5.4 | -4.4 | 5.6 | 3.2 | 23.2 | 8.5 | 4.0 | 6.6 | 60.6 | 4.9 | 6.8 | 10.9 | 15.4 | 7.5 | 7.6 | 4.4 | 9.9 | 8.0 | 8.4 | 4.9 | 15.8 | 9.9 | 9.1 | 6.7 | 1.0 | 10.8 | 5.7 | 6.0 | 18.0 | 10.1 | 11.9 | 13.0 | 10.9 | 10.7 | 9.9 | 8.3 | 14.6 | 7.6 | 9.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 117 | 89 | 340 | 304 | 67 | 176 | 169 | 203 | 119 | 90 | 271 | 156 | 129 | 172 | 522 | 90 | 98 |
| Percentage of ProfitLoss | -35.7 | 342.3 | 66.1 | -9.0 | 24.5 | 116.6 | 194.3 | -414.3 | 274.8 | 398.3 | 130.9 | 240.5 | 441.2 | 393.2 | 117.4 | 277.7 | 212.9 |
| Percentage of Revenues | 7.3 | 5.9 | 22.5 | 19.8 | 5.2 | 10.9 | 10.4 | 18.0 | 15.5 | 12.6 | 30.4 | 20.4 | 17.7 | 26.0 | 71.1 | 13.5 | 14.4 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 15.7 | 12.6 | 0.0 | 39.3 | 10.7 | 23.8 | 0.0 | 28.9 | 16.9 | 13.8 | 0.0 | 21.9 | 19.0 | 27.6 | 0.0 | 14.7 | 15.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -333.0 | -35.0 | 240 | -3679.0 | 261 | 31 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 |
| Percentage of ProfitLoss | 101.5 | -134.6 | 46.7 | 109.3 | 95.6 | 20.5 | -25.3 | 191.8 | 2.8 | -3.5 | -6.9 | -11.7 | -29.4 | -129.1 | -4.3 | -35.9 | -12.3 |
| Percentage of Revenues | -20.7 | -2.3 | 15.9 | -239.1 | 20.3 | 1.9 | -1.4 | -8.4 | 0.2 | -0.1 | -1.6 | -1.0 | -1.2 | -8.5 | -2.6 | -1.7 | -0.8 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -37.6 | -4.3 | 0.0 | -468.1 | 38.9 | 3.5 | 0.0 | -21.1 | 1.4 | -1.0 | 0.0 | -9.9 | -12.0 | -97.9 | 0.0 | -24.5 | -11.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -332.0 | -12.0 | 467 | -3256.0 | 252 | 123 | 43 | -60.0 | 42 | 21 | 206 | 63 | 28 | 43 | 443 | 30 | 44 |
| Percentage of ProfitLoss | 101.2 | -46.2 | 90.9 | 96.7 | 92.3 | 81.5 | 49.4 | 122.4 | 97.5 | 95.2 | 99.3 | 98.3 | 95.7 | 98.0 | 99.7 | 94.1 | 97.0 |
| Percentage of Revenues | -20.6 | -0.8 | 30.9 | -211.6 | 19.6 | 7.6 | 2.7 | -5.3 | 5.5 | 3.0 | 23.1 | 8.3 | 3.8 | 6.5 | 60.4 | 4.6 | 6.6 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 90 | 24 | 256 | 314 | 14 | 124 | 112 | 140 | 54 | 22 | 219 | 69 | 35 | 98 | 456 | 42 | 48 |
| Percentage of ProfitLoss | -27.4 | 92.3 | 49.8 | -9.3 | 5.1 | 82.1 | 128.7 | -285.7 | 125.1 | 96.7 | 105.5 | 106.8 | 119.8 | 223.4 | 102.7 | 129.9 | 106.3 |
| Percentage of Revenues | 5.6 | 1.6 | 16.9 | 20.4 | 1.1 | 7.7 | 6.9 | 12.4 | 7.0 | 3.0 | 24.5 | 9.1 | 4.8 | 14.8 | 62.2 | 6.3 | 7.2 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 321.4 | 88.9 | 0.0 | 1256.0 | 56.0 | 516.7 | 0.0 | 1555.6 | 0.0 | 550225.0 | 0.0 | 1157350.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 130 | -40.0 | -789.0 | 2950 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -110.816 | -474.916 | -216.999 | -154.55 | -213.604 | -958.333 | -119.12 | -139.886 |
| Percentage of ProfitLoss | -39.6 | -153.8 | -153.5 | -87.6 | -117.6 | -200.7 | -247.1 | 485.7 | -400.2 | -486.7 | -228.7 | -333.8 | -527.3 | -485.5 | -215.5 | -365.8 | -303.9 |
| Percentage of Revenues | 8.1 | -2.6 | -52.2 | 191.7 | -25.0 | -18.8 | -13.3 | -21.2 | -22.5 | -15.3 | -53.2 | -28.3 | -21.2 | -32.1 | -130.6 | -17.8 | -20.6 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | 0.0 | -6413.0 | 802.5 | 644.7 | 0.0 | 767.7 | 771.5 | 635.4 | 0.0 | 869.4 | 711.7 | 1164.6 | 0.0 | 660.9 | 665.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 1612 | 1511 | 1512 | 1539 | 1283 | 1609 | 1622 | 1125 | 770 | 722 | 893 | 766 | 730 | 665 | 734 | 670 | 679 | 649 | 797 | 693 | 666 | 578 | 611 | 548 | 554 | 504 | 613 | 494 | 455 | 412 | 427 | 338 | 314 | 282 | 329 | 260 | 253 | 223 | 212 | 180 | 186 | 182 | 226 | 186 | 183 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 744 | 705 | 941 | 774 | 627 | 739 | 777 | 702 | 704 | 656 | 835 | 714 | 680 | 625 | 673 | 614 | 623 |
| Percentage of Revenues | 46.2 | 46.7 | 62.2 | 50.3 | 48.9 | 45.9 | 47.9 | 62.4 | 91.4 | 90.9 | 93.5 | 93.2 | 93.2 | 94.0 | 91.8 | 91.7 | 91.7 |
| Percentage of Revenues | 46.2 | 46.7 | 62.2 | 50.3 | 48.9 | 45.9 | 47.9 | 62.4 | 91.4 | 90.9 | 93.5 | 93.2 | 93.2 | 94.0 | 91.8 | 91.7 | 91.7 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 886 | 818 | 596 | 786 | 671 | 893 | 871 | 445 | 88 | 83 | 86 | 76 | 71 | 58 | 61 | 47 | 50 |
| Percentage of Revenues | 55.0 | 54.1 | 39.4 | 51.1 | 52.3 | 55.5 | 53.7 | 39.6 | 11.5 | 11.5 | 9.7 | 10.0 | 9.8 | 8.7 | 8.3 | 7.1 | 7.4 |
| Percentage of Revenues | 55.0 | 54.1 | 39.4 | 51.1 | 52.3 | 55.5 | 53.7 | 39.6 | 11.5 | 11.5 | 9.7 | 10.0 | 9.8 | 8.7 | 8.3 | 7.1 | 7.4 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 28 | 27 | 26 | 25 | 25 | 24 | 26 | 9.0 | 0.0 | 0.004 | -0.006 | 0.006 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | 1.7 | 1.8 | 1.7 | 1.6 | 1.9 | 1.5 | 1.6 | 0.8 | 0.0 | 0.0 | -0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | 1.7 | 1.8 | 1.7 | 1.6 | 1.9 | 1.5 | 1.6 | 0.8 | 0.0 | 0.0 | -0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 120 | 108 | 104 | 128 |
| Percentage of Revenues | 7.4 | 7.1 | 8.1 | 8.0 |
| Percentage of Revenues | 7.4 | 7.1 | 8.1 | 8.0 |
| Percentage of Revenues sbgi:CorporateAndReconcilingItems | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -46.0 | -39.0 | -51.0 | -46.0 | -40.0 | -47.0 | -52.0 | -31.0 | -22.504 | -17.439 | -28.601 | -24.96 | -21.717 | -18.342 | -22.686 | -18.025 | -21.011 |
| Percentage of Revenues | -2.9 | -2.6 | -3.4 | -3.0 | -3.1 | -2.9 | -3.2 | -2.8 | -2.9 | -2.4 | -3.2 | -3.3 | -3.0 | -2.8 | -3.1 | -2.7 | -3.1 |
| Percentage of Revenues | -2.9 | -2.6 | -3.4 | -3.0 | -3.1 | -2.9 | -3.2 | -2.8 | -2.9 | -2.4 | -3.2 | -3.3 | -3.0 | -2.8 | -3.1 | -2.7 | -3.1 |
| Percentage of Revenues srt:ConsolidationEliminations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -33.0 | -30.0 | -28.0 | -27.0 | -29.0 | -32.0 | -32.0 | -17.0 | -6.0 | -4.0 |
| Percentage of Revenues | -2.0 | -2.0 | -1.9 | -1.8 | -2.3 | -2.0 | -2.0 | -1.5 | -0.8 | -0.6 |
| Percentage of Revenues | -2.0 | -2.0 | -1.9 | -1.8 | -2.3 | -2.0 | -2.0 | -1.5 | -0.8 | -0.6 |
| Percentage of Revenues us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -5.0 | -1.0 | 1.0 | -1.0 | 0.0 | 0.0 | -1.0 | 0.0 | 0.0 |
| Percentage of Revenues | -0.3 | -0.1 | 0.1 | -0.1 | 0.0 | 0.0 | -0.1 | 0.0 | 0.0 |
| Percentage of Revenues | -0.3 | -0.1 | 0.1 | -0.1 | 0.0 | 0.0 | -0.1 | 0.0 | 0.0 |
| Percentage of Revenues us-gaap:IntersegmentElimination sbgi:AdvertisingRevenueNetOfAgencyCommissions | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -28.0 | -29.0 | -28.0 | -28.0 | -32.0 | -16.0 | -6.0 | -4.0 |
| Percentage of Revenues | -1.7 | -1.9 | -1.8 | -2.2 | -2.0 | -1.4 | -0.8 | -0.6 |
| Percentage of Revenues | -1.7 | -1.9 | -1.8 | -2.2 | -2.0 | -1.4 | -0.8 | -0.6 |
| Percentage of Revenues us-gaap:IntersegmentElimination sbgi:OtherMediaNonMediaRevenuesandIntercompanyRevenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 280 | 267 | 503 | 344 | 208 | 310 | 364 | 302 | 315 |
| Percentage of Revenues | 17.4 | 17.7 | 33.3 | 22.4 | 16.2 | 19.3 | 22.4 | 26.8 | 40.9 |
| Percentage of Revenues | 17.4 | 17.7 | 33.3 | 22.4 | 16.2 | 19.3 | 22.4 | 26.8 | 40.9 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:AdvertisingRevenueNetOfAgencyCommissions sbgi:BroadcastSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 162 | 65 | 14 | 124 | 3.0 | 55 | 60 | 43 | 0.0 |
| Percentage of Revenues | 10.0 | 4.3 | 0.9 | 8.1 | 0.2 | 3.4 | 3.7 | 3.8 | 0.0 |
| Percentage of Revenues | 10.0 | 4.3 | 0.9 | 8.1 | 0.2 | 3.4 | 3.7 | 3.8 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:AdvertisingRevenueNetOfAgencyCommissions sbgi:LocalSportsSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 54 | 40 | 39 | 31 | 25 | 35 | 32 | 32 | 24 | 20 |
| Percentage of Revenues | 3.3 | 2.6 | 2.6 | 2.0 | 1.9 | 2.2 | 2.0 | 2.8 | 3.1 | 2.8 |
| Percentage of Revenues | 3.3 | 2.6 | 2.6 | 2.0 | 1.9 | 2.2 | 2.0 | 2.8 | 3.1 | 2.8 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:AdvertisingRevenueNetOfAgencyCommissions us-gaap:AllOtherSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 363 | 361 | 355 | 356 | 349 | 355 | 346 | 340 | 335 |
| Percentage of Revenues | 22.5 | 23.9 | 23.5 | 23.1 | 27.2 | 22.1 | 21.3 | 30.2 | 43.5 |
| Percentage of Revenues | 22.5 | 23.9 | 23.5 | 23.1 | 27.2 | 22.1 | 21.3 | 30.2 | 43.5 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:DistributionRevenue sbgi:BroadcastSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 666 | 698 | 513 | 597 | 610 | 752 | 723 | 306 | 0.0 |
| Percentage of Revenues | 41.3 | 46.2 | 33.9 | 38.8 | 47.5 | 46.7 | 44.6 | 27.2 | 0.0 |
| Percentage of Revenues | 41.3 | 46.2 | 33.9 | 38.8 | 47.5 | 46.7 | 44.6 | 27.2 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:DistributionRevenue sbgi:LocalSportsSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 49 | 50 | 49 | 50 | 51 | 49 | 33 | 33 | 32 | 32 |
| Percentage of Revenues | 3.0 | 3.3 | 3.2 | 3.2 | 4.0 | 3.0 | 2.0 | 2.9 | 4.2 | 4.4 |
| Percentage of Revenues | 3.0 | 3.3 | 3.2 | 3.2 | 4.0 | 3.0 | 2.0 | 2.9 | 4.2 | 4.4 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:DistributionRevenue us-gaap:AllOtherSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 |
| Value | 44 | 37 | 34 | 35 | 36 | 19 | 10.0 |
| Percentage of Revenues | 2.7 | 2.4 | 2.2 | 2.7 | 2.2 | 1.7 | 1.3 |
| Percentage of Revenues | 2.7 | 2.4 | 2.2 | 2.7 | 2.2 | 1.7 | 1.3 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:OtherMediaNonMediaRevenuesandIntercompanyRevenues sbgi:BroadcastSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 |
| Value | 10.0 | 5.0 | 6.0 | 3.0 | 5.0 | 3.0 | 0.0 |
| Percentage of Revenues | 0.6 | 0.3 | 0.4 | 0.2 | 0.3 | 0.3 | 0.0 |
| Percentage of Revenues | 0.6 | 0.3 | 0.4 | 0.2 | 0.3 | 0.3 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:OtherMediaNonMediaRevenuesandIntercompanyRevenues sbgi:LocalSportsSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 17 | 18 | 24 | 28 | 44 | 64 | 61 | 55 |
| Percentage of Revenues | 1.1 | 1.2 | 1.6 | 2.2 | 2.7 | 5.7 | 7.9 | 7.6 |
| Percentage of Revenues | 1.1 | 1.2 | 1.6 | 2.2 | 2.7 | 5.7 | 7.9 | 7.6 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:OtherMediaNonMediaRevenuesandIntercompanyRevenues us-gaap:AllOtherSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 687 | 665 | 896 | 734 | 592 | 701 | 751 | 661 | 660 |
| Percentage of Revenues | 42.6 | 44.0 | 59.3 | 47.7 | 46.1 | 43.6 | 46.3 | 58.8 | 85.6 |
| Percentage of Revenues | 42.6 | 44.0 | 59.3 | 47.7 | 46.1 | 43.6 | 46.3 | 58.8 | 85.6 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:BroadcastSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 838 | 768 | 531 | 727 | 616 | 812 | 787 | 352 | 0.0 |
| Percentage of Revenues | 52.0 | 50.8 | 35.1 | 47.2 | 48.0 | 50.5 | 48.5 | 31.3 | 0.0 |
| Percentage of Revenues | 52.0 | 50.8 | 35.1 | 47.2 | 48.0 | 50.5 | 48.5 | 31.3 | 0.0 |
| Percentage of Revenues us-gaap:OperatingSegments sbgi:LocalSportsSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 |
| Value | 120 | 108 | 113 | 105 | 104 | 128 | 110 | 122 | 111 | 103 | 95 | 87 | 87 | 69 | 64 | 60 | 61 | 57 | 57 | 58 | 58 | 32 | 37 | 22 | 21 | 19 | 20 | 18 | 17 | 14 | 17 | 14 | 12 | 11 | 15 | 12 |
| Percentage of Revenues | 7.4 | 7.1 | 7.5 | 6.8 | 8.1 | 8.0 | 6.8 | 10.8 | 14.4 | 14.3 | 10.7 | 11.4 | 12.0 | 10.4 | 8.8 | 9.0 | 9.0 | 8.8 | 7.2 | 8.4 | 8.8 | 5.5 | 6.1 | 4.1 | 3.9 | 3.9 | 3.4 | 3.7 | 3.9 | 3.6 | 4.1 | 4.4 | 4.1 | 4.1 | 4.7 | 4.8 |
| Percentage of Revenues | 7.4 | 7.1 | 7.5 | 6.8 | 8.1 | 8.0 | 6.8 | 10.8 | 14.4 | 14.3 | 10.7 | 11.4 | 12.0 | 10.4 | 8.8 | 9.0 | 9.0 | 8.8 | 7.2 | 8.4 | 8.8 | 5.5 | 6.1 | 4.1 | 3.9 | 3.9 | 3.4 | 3.7 | 3.9 | 3.6 | 4.1 | 4.4 | 4.1 | 4.1 | 4.7 | 4.8 |
| Percentage of Revenues us-gaap:OperatingSegments us-gaap:AllOtherSegments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 113 | 105 | 104 | 128 | 116 | 129 | 117 | 107 |
| Percentage of Revenues | 7.5 | 6.8 | 8.1 | 8.0 | 7.2 | 11.5 | 15.2 | 14.8 |
| Percentage of Revenues | 7.5 | 6.8 | 8.1 | 8.0 | 7.2 | 11.5 | 15.2 | 14.8 |
| Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 491 | 371 | 554 | 500 | 235 | 400 | 456 | 376 | 339 | 308 | 499 | 385 | 359 | 316 | 377 | 330 | 342 | 318 |
| Percentage of Revenues | 30.5 | 24.6 | 36.6 | 32.5 | 18.3 | 24.9 | 28.1 | 33.4 | 44.0 | 42.7 | 55.9 | 50.3 | 49.2 | 47.5 | 51.4 | 49.3 | 50.4 | 49.0 |
| Percentage of Revenues | 30.5 | 24.6 | 36.6 | 32.5 | 18.3 | 24.9 | 28.1 | 33.4 | 44.0 | 42.7 | 55.9 | 50.3 | 49.2 | 47.5 | 51.4 | 49.3 | 50.4 | 49.0 |
| Percentage of Revenues sbgi:AdvertisingRevenueNetOfAgencyCommissions | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 1078 | 1109 | 917 | 1003 | 1010 | 1156 | 1102 | 679 | 366 | 352 | 334 | 330 | 319 | 314 | 299 | 285 | 278 | 275 |
| Percentage of Revenues | 66.9 | 73.4 | 60.6 | 65.2 | 78.7 | 71.8 | 67.9 | 60.4 | 47.6 | 48.8 | 37.4 | 43.2 | 43.8 | 47.2 | 40.9 | 42.5 | 41.0 | 42.5 |
| Percentage of Revenues | 66.9 | 73.4 | 60.6 | 65.2 | 78.7 | 71.8 | 67.9 | 60.4 | 47.6 | 48.8 | 37.4 | 43.2 | 43.8 | 47.2 | 40.9 | 42.5 | 41.0 | 42.5 |
| Percentage of Revenues sbgi:DistributionRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 43 | 31 | 36 | 38 | 53 | 70 | 65 | 62 |
| Percentage of Revenues | 2.7 | 2.1 | 2.3 | 3.0 | 3.3 | 6.2 | 8.4 | 8.6 |
| Percentage of Revenues | 2.7 | 2.1 | 2.3 | 3.0 | 3.3 | 6.2 | 8.4 | 8.6 |
| Percentage of Revenues sbgi:OtherMediaNonMediaRevenuesandIntercompanyRevenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 |
| Value | 36 | 36 | 46 | 39 | 32 | 39 | 44 | 38 | 38 | 34 | 51 | 43 | 38 | 37 | 40 | 31 | 26 | 26 | 29 | 2.1 | 1.9 | 25 | 1.9 | 1.7 |
| Percentage of Revenues | 2.2 | 2.4 | 3.0 | 2.5 | 2.5 | 2.4 | 2.7 | 3.4 | 5.0 | 4.8 | 5.8 | 5.6 | 5.3 | 5.7 | 5.5 | 4.7 | 4.0 | 4.0 | 4.2 | 0.3 | 0.3 | 4.7 | 0.3 | 0.3 |
| Percentage of Revenues | 2.2 | 2.4 | 3.0 | 2.5 | 2.5 | 2.4 | 2.7 | 3.4 | 5.0 | 4.8 | 5.8 | 5.6 | 5.3 | 5.7 | 5.5 | 4.7 | 4.0 | 4.0 | 4.2 | 0.3 | 0.3 | 4.7 | 0.3 | 0.3 |
| Percentage of Revenues sbgi:CunninghamBroadcastingCorporation sbgi:CunninghamLicenseRelatedAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 |
| Value | 1600 | 1497 | 1519 | 1260 | 1574 | 1070 | 720 | 673 | 730 | 695 | 643 | 629 | 637 |
| Percentage of Revenues | 99.3 | 99.1 | 98.7 | 98.2 | 97.8 | 95.1 | 93.5 | 93.3 | 95.3 | 95.3 | 96.7 | 93.8 | 93.8 |
| Percentage of Revenues | 99.3 | 99.1 | 98.7 | 98.2 | 97.8 | 95.1 | 93.5 | 93.3 | 95.3 | 95.3 | 96.7 | 93.8 | 93.8 |
| Percentage of Revenues sbgi:Media | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 |
| Value | 12 | 14 | 20 | 23 | 35 | 55 | 49 | 48 | 35 | 34 | 21 | 14 | 15 |
| Percentage of Revenues | 0.7 | 0.9 | 1.3 | 1.8 | 2.2 | 4.9 | 6.5 | 6.7 | 4.7 | 4.7 | 3.3 | 2.2 | 2.2 |
| Percentage of Revenues | 0.7 | 0.9 | 1.3 | 1.8 | 2.2 | 4.9 | 6.5 | 6.7 | 4.7 | 4.7 | 3.3 | 2.2 | 2.2 |
| Percentage of Revenues sbgi:NonMedia | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 |
| Value | 672 | -128.0 | -124.0 |
| Percentage of Revenues | 44.4 | -8.3 | -9.7 |
| Percentage of Revenues | 44.4 | -8.3 | -9.7 |
| Percentage of Revenues sbgi:DistributionRevenueRebate | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 234 | 213 | 224 | 212 | 186 | 210 | 222 | 185 | 164 | 159 | 177 | 154 | 150 | 146 | 148 | 133 | 127 | 124 | 131 | 126 | 128 | 115 | 121 | 105 | 102 | 101 | 108 | 97 | 82 | 81 | 78 | 66 | 53 | 51 | 49 | 43 | 42 | 36 | 31 | 31 | 30 | 30 | 33 | 32 | 30 |
| Percentage of SellingGeneralAndAdministrativeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 14.5 | 14.1 | 14.8 | 13.8 | 14.5 | 13.1 | 13.7 | 16.4 | 21.4 | 22.1 | 19.9 | 20.2 | 20.7 | 22.1 | 20.2 | 19.9 | 18.7 | 19.2 | 16.5 | 18.3 | 19.3 | 19.9 | 19.9 | 19.2 | 18.6 | 20.2 | 17.7 | 19.7 | 18.1 | 19.9 | 18.3 | 19.5 | 17.0 | 18.4 | 15.0 | 16.7 | 16.7 | 16.1 | 15.0 | 17.3 | 16.2 | 16.7 | 14.9 | 17.3 | 16.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 12780 | 13132 | 13382 | 12483 | 16769 | 17360 | 17370 | 17779 | 6553 | 6634 | 6572 | 6627 | 6581 | 6663 | 6784 | 6687 | 6289 | 6317 | 5963 | 5866 | 5779 | 5747 | 5432 | 5480 | 5380 | 5417 | 5452 | 5294 | 4181 | 4110 | 4147 | 3617 | 3343 | 2734 | 2729 | 2245 | 2160 | 1771 | 1571 | 1563 | 1497 | 1485 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 89 | 83 | 75 | 71 |
| Percentage of Assets | 0.7 | 0.6 | 0.6 | 0.4 |
| Percentage of Assets | 0.7 | 0.6 | 0.6 | 0.4 |
| Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 219 | 241 | 233 | 228 |
| Percentage of Assets | 1.7 | 1.8 | 1.7 | 1.3 |
| Percentage of Assets | 1.7 | 1.8 | 1.7 | 1.3 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5215 | 5343 | 5410 | 5433 | 5262 | 5373 | 5427 | 5382 | 5330 | 5359 | 5243 | 5316 | 5264 | 5741 |
| Percentage of Assets | 40.8 | 40.7 | 40.4 | 43.5 | 31.4 | 31.0 | 31.2 | 30.3 | 81.3 | 80.8 | 79.8 | 80.2 | 80.0 | 84.6 |
| Percentage of Assets | 40.8 | 40.7 | 40.4 | 43.5 | 31.4 | 31.0 | 31.2 | 30.3 | 81.3 | 80.8 | 79.8 | 80.2 | 80.0 | 84.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 7405 | 7692 | 7978 | 7225 | 11304 | 11175 | 11683 | 12260 | 440 | 505 | 507 | 504 | 478 | 507 |
| Percentage of Assets | 57.9 | 58.6 | 59.6 | 57.9 | 67.4 | 64.4 | 67.3 | 69.0 | 6.7 | 7.6 | 7.7 | 7.6 | 7.3 | 7.5 |
| Percentage of Assets | 57.9 | 58.6 | 59.6 | 57.9 | 67.4 | 64.4 | 67.3 | 69.0 | 6.7 | 7.6 | 7.7 | 7.6 | 7.3 | 7.5 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 564 | 713 | 577 | 425 | 2355 | 2202 | 2358 | 2345 | 1597 | 1574 | 1639 | 1623 | 1624 | 1572 |
| Percentage of Assets | 4.4 | 5.4 | 4.3 | 3.4 | 14.0 | 12.7 | 13.6 | 13.2 | 24.4 | 23.7 | 24.9 | 24.5 | 24.7 | 23.2 |
| Percentage of Assets | 4.4 | 5.4 | 4.3 | 3.4 | 14.0 | 12.7 | 13.6 | 13.2 | 24.4 | 23.7 | 24.9 | 24.5 | 24.7 | 23.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5781 | 5828 | 5804 | 5633 | 5416 | 6121 | 5598 | 5490 | 5395 | 5398 | 5504 | 5510 | 5591 | 5569 |
| Percentage of Assets | 45.2 | 44.4 | 43.4 | 45.1 | 32.3 | 35.3 | 32.2 | 30.9 | 82.3 | 81.4 | 83.8 | 83.1 | 85.0 | 82.1 |
| Percentage of Assets | 45.2 | 44.4 | 43.4 | 45.1 | 32.3 | 35.3 | 32.2 | 30.9 | 82.3 | 81.4 | 83.8 | 83.1 | 85.0 | 82.1 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 2275 | 2121 |
| Percentage of Assets | 17.8 | 16.2 |
| Percentage of Assets | 17.8 | 16.2 |
| Percentage of Assets sbgi:CorporateAndReconcilingItems | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -6185.0 | -6444.0 | -6387.0 | -6233.0 | -7568.0 | -7511.0 | -7696.0 | -7698.0 | -6209.81 | -6203.912 | -6322.771 | -6327.23 | -6377.85 | -6606.395 |
| Percentage of Assets | -48.4 | -49.1 | -47.7 | -49.9 | -45.1 | -43.3 | -44.3 | -43.3 | -94.8 | -93.5 | -96.2 | -95.5 | -96.9 | -97.4 |
| Percentage of Assets | -48.4 | -49.1 | -47.7 | -49.9 | -45.1 | -43.3 | -44.3 | -43.3 | -94.8 | -93.5 | -96.2 | -95.5 | -96.9 | -97.4 |
| Percentage of Assets srt:ConsolidationEliminations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | -11.0 | -11.0 | -13.0 | -42.0 | -80.0 | -18.0 | -25.0 |
| Percentage of Assets | -0.1 | -0.1 | -0.1 | -0.3 | -0.5 | -0.1 | -0.1 |
| Percentage of Assets | -0.1 | -0.1 | -0.1 | -0.3 | -0.5 | -0.1 | -0.1 |
| Percentage of Assets us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 4671 | 4800 | 4908 | 4673 | 4657 | 4866 |
| Percentage of Assets | 36.5 | 36.6 | 36.7 | 37.4 | 27.8 | 28.0 |
| Percentage of Assets | 36.5 | 36.6 | 36.7 | 37.4 | 27.8 | 28.0 |
| Percentage of Assets us-gaap:OperatingSegments sbgi:BroadcastSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 5845 | 6222 | 6620 | 6211 | 11040 | 11258 |
| Percentage of Assets | 45.7 | 47.4 | 49.5 | 49.8 | 65.8 | 64.8 |
| Percentage of Assets | 45.7 | 47.4 | 49.5 | 49.8 | 65.8 | 64.8 |
| Percentage of Assets us-gaap:OperatingSegments sbgi:LocalSportsSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 1867 | 1641 | 1152 | 1774 | 1271 |
| Percentage of Assets | 14.0 | 13.1 | 6.9 | 10.2 | 7.3 |
| Percentage of Assets | 14.0 | 13.1 | 6.9 | 10.2 | 7.3 |
| Percentage of Assets us-gaap:OperatingSegments us-gaap:CorporateAndOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 78 | 78 | 71 |
| Percentage of Assets | 0.6 | 0.5 | 0.4 |
| Percentage of Assets | 0.6 | 0.5 | 0.4 |
| Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 237 | 268 | 228 |
| Percentage of Assets | 1.9 | 1.6 | 1.3 |
| Percentage of Assets | 1.9 | 1.6 | 1.3 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 14142 | 14130 | 14377 | 13966 | 14448 | 15182 | 14598 | 14742 | 5024 | 5115 | 4971 | 5041 | 4996 | 5091 | 5250 | 5578 | 5164 | 5220 | 5405 | 5379 | 5236 | 5227 | 4932 | 5029 | 4934 | 5005 | 5046 | 4939 | 3811 | 3767 | 3741 | 3201 | 2957 | 2831 | 2829 | 2297 | 2226 | 1858 | 1682 | 1689 | 1632 | 1643 |
| Percentage of Liabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 110.7 | 107.6 | 107.4 | 111.9 | 86.2 | 87.5 | 84.0 | 82.9 | 76.7 | 77.1 | 75.6 | 76.1 | 75.9 | 76.4 | 77.4 | 83.4 | 82.1 | 82.6 | 90.6 | 91.7 | 90.6 | 91.0 | 90.8 | 91.8 | 91.7 | 92.4 | 92.6 | 93.3 | 91.1 | 91.7 | 90.2 | 88.5 | 88.5 | 103.6 | 103.7 | 102.3 | 103.1 | 104.9 | 107.1 | 108.0 | 109.0 | 110.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 70 | 73 | 76 | 48 |
| Percentage of Liabilities | 0.5 | 0.5 | 0.5 | 0.3 |
| Percentage of Assets | 0.5 | 0.6 | 0.6 | 0.3 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 32.0 | 30.3 | 32.6 | 21.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1794 | 1826 | 1864 | 1921 | 1768 | 1779 | 1873 | 1781 | 1752 | 1750 | 1590 | 1607 | 1506 | 1626 |
| Percentage of Liabilities | 12.7 | 12.9 | 13.0 | 13.8 | 12.2 | 11.7 | 12.8 | 12.1 | 34.9 | 34.2 | 32.0 | 31.9 | 30.2 | 31.0 |
| Percentage of Assets | 14.0 | 13.9 | 13.9 | 15.4 | 10.5 | 10.2 | 10.8 | 10.0 | 26.7 | 26.4 | 24.2 | 24.3 | 22.9 | 24.0 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 34.4 | 34.2 | 34.5 | 35.4 | 33.6 | 33.1 | 34.5 | 33.1 | 32.9 | 32.7 | 30.3 | 30.2 | 28.6 | 28.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 9553 | 9522 | 9801 | 9313 | 9376 | 9440 | 9348 | 9577 | 629 | 650 | 658 | 671 | 654 | 628 |
| Percentage of Liabilities | 67.6 | 67.4 | 68.2 | 66.7 | 64.9 | 62.2 | 64.0 | 65.0 | 12.5 | 12.7 | 13.2 | 13.3 | 13.1 | 12.0 |
| Percentage of Assets | 74.7 | 72.5 | 73.2 | 74.6 | 55.9 | 54.4 | 53.8 | 53.9 | 9.6 | 9.8 | 10.0 | 10.1 | 9.9 | 9.3 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 129.0 | 123.8 | 122.9 | 128.9 | 82.9 | 84.5 | 80.0 | 78.1 | 142.9 | 128.7 | 129.7 | 133.1 | 136.7 | 123.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 2188 | 1991 | 1850 | 2162 | 745 | 742 | 855 | 850 | 28 | 14 | 0.389 | 0.227 | 3.754 | 4.219 |
| Percentage of Liabilities | 15.5 | 14.1 | 12.9 | 15.5 | 5.2 | 4.9 | 5.9 | 5.8 | 0.6 | 0.3 | 0.0 | 0.0 | 0.1 | 0.1 |
| Percentage of Assets | 17.1 | 15.2 | 13.8 | 17.3 | 4.4 | 4.3 | 4.9 | 4.8 | 0.4 | 0.2 | 0.0 | 0.0 | 0.1 | 0.1 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 387.9 | 279.2 | 320.6 | 508.7 | 31.6 | 33.7 | 36.3 | 36.2 | 1.8 | 0.9 | 0.0 | 0.0 | 0.2 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 4527 | 4602 | 4543 | 4541 | 4521 | 5165 | 4538 | 4513 | 3844 | 3913 | 3925 | 3929 | 3997 | 4071 |
| Percentage of Liabilities | 32.0 | 32.6 | 31.6 | 32.5 | 31.3 | 34.0 | 31.1 | 30.6 | 76.5 | 76.5 | 79.0 | 77.9 | 80.0 | 77.5 |
| Percentage of Assets | 35.4 | 35.0 | 33.9 | 36.4 | 27.0 | 29.8 | 26.1 | 25.4 | 58.7 | 59.0 | 59.7 | 59.3 | 60.7 | 60.0 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 78.3 | 79.0 | 78.3 | 80.6 | 83.5 | 84.4 | 81.1 | 82.2 | 71.3 | 72.5 | 71.3 | 71.3 | 71.5 | 73.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 56 | 57 | 60 |
| Percentage of Liabilities | 0.4 | 0.4 | 0.4 |
| Percentage of Assets | 0.4 | 0.4 | 0.4 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:Nonrecourse | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 60 | 27 |
| Percentage of Liabilities | 0.4 | 0.2 |
| Percentage of Assets | 0.4 | 0.2 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:Recourse | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -3920.0 | -3811.0 | -3681.0 | -3971.0 | -1962.0 | -1944.0 | -2016.0 | -1979.0 | -1230.514 | -1215.042 | -1203.087 | -1167.732 | -1165.918 | -1080.189 |
| Percentage of Liabilities | -27.7 | -27.0 | -25.6 | -28.4 | -13.6 | -12.8 | -13.8 | -13.4 | -24.5 | -23.8 | -24.2 | -23.2 | -23.3 | -20.6 |
| Percentage of Assets | -30.7 | -29.0 | -27.5 | -31.8 | -11.7 | -11.2 | -11.6 | -11.1 | -18.8 | -18.3 | -18.3 | -17.6 | -17.7 | -15.9 |
| Percentage of Assets srt:ConsolidationEliminations | 63.4 | 59.1 | 57.6 | 63.7 | 25.9 | 25.9 | 26.2 | 25.7 | 19.8 | 19.6 | 19.0 | 18.5 | 18.3 | 16.4 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 69 | 50 | 48 |
| Percentage of Liabilities | 0.5 | 0.3 | 0.3 |
| Percentage of Assets | 0.6 | 0.3 | 0.3 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 29.1 | 18.7 | 21.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 12780 | 13132 | 13382 | 12483 | 16769 | 17360 | 17370 | 17779 | 6553 | 6634 | 6572 | 6627 | 6581 | 6663 | 6784 | 6687 | 6289 | 6317 | 5963 | 5866 | 5779 | 5747 | 5432 | 5480 | 5380 | 5417 | 5452 | 5294 | 4181 | 4110 | 4147 | 3617 | 3343 | 2734 | 2729 | 2245 | 2160 | 1771 | 1571 | 1563 | 1497 | 1485 |
| Percentage of LiabilitiesAndStockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5215 | 5343 | 5410 | 5433 | 5262 | 5373 | 5427 | 5382 | 5330 | 5359 | 5243 | 5316 | 5264 | 5741 |
| Percentage of LiabilitiesAndStockholdersEquity | 40.8 | 40.7 | 40.4 | 43.5 | 31.4 | 31.0 | 31.2 | 30.3 | 81.3 | 80.8 | 79.8 | 80.2 | 80.0 | 84.6 |
| Percentage of Assets | 40.8 | 40.7 | 40.4 | 43.5 | 31.4 | 31.0 | 31.2 | 30.3 | 81.3 | 80.8 | 79.8 | 80.2 | 80.0 | 84.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 7405 | 7692 | 7978 | 7225 | 11304 | 11175 | 11683 | 12260 | 440 | 505 | 507 | 504 | 478 | 507 |
| Percentage of LiabilitiesAndStockholdersEquity | 57.9 | 58.6 | 59.6 | 57.9 | 67.4 | 64.4 | 67.3 | 69.0 | 6.7 | 7.6 | 7.7 | 7.6 | 7.3 | 7.5 |
| Percentage of Assets | 57.9 | 58.6 | 59.6 | 57.9 | 67.4 | 64.4 | 67.3 | 69.0 | 6.7 | 7.6 | 7.7 | 7.6 | 7.3 | 7.5 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 564 | 713 | 577 | 425 | 2355 | 2202 | 2358 | 2345 | 1597 | 1574 | 1639 | 1623 | 1624 | 1572 |
| Percentage of LiabilitiesAndStockholdersEquity | 4.4 | 5.4 | 4.3 | 3.4 | 14.0 | 12.7 | 13.6 | 13.2 | 24.4 | 23.7 | 24.9 | 24.5 | 24.7 | 23.2 |
| Percentage of Assets | 4.4 | 5.4 | 4.3 | 3.4 | 14.0 | 12.7 | 13.6 | 13.2 | 24.4 | 23.7 | 24.9 | 24.5 | 24.7 | 23.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5781 | 5828 | 5804 | 5633 | 5416 | 6121 | 5598 | 5490 | 5395 | 5398 | 5504 | 5510 | 5591 | 5569 |
| Percentage of LiabilitiesAndStockholdersEquity | 45.2 | 44.4 | 43.4 | 45.1 | 32.3 | 35.3 | 32.2 | 30.9 | 82.3 | 81.4 | 83.8 | 83.1 | 85.0 | 82.1 |
| Percentage of Assets | 45.2 | 44.4 | 43.4 | 45.1 | 32.3 | 35.3 | 32.2 | 30.9 | 82.3 | 81.4 | 83.8 | 83.1 | 85.0 | 82.1 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -6185.0 | -6444.0 | -6387.0 | -6233.0 | -7568.0 | -7511.0 | -7696.0 | -7698.0 | -6209.81 | -6203.912 | -6322.771 | -6327.23 | -6377.85 | -6606.395 |
| Percentage of LiabilitiesAndStockholdersEquity | -48.4 | -49.1 | -47.7 | -49.9 | -45.1 | -43.3 | -44.3 | -43.3 | -94.8 | -93.5 | -96.2 | -95.5 | -96.9 | -97.4 |
| Percentage of Assets | -48.4 | -49.1 | -47.7 | -49.9 | -45.1 | -43.3 | -44.3 | -43.3 | -94.8 | -93.5 | -96.2 | -95.5 | -96.9 | -97.4 |
| Percentage of Assets srt:ConsolidationEliminations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | -1624.0 | -1279.0 | -1274.0 | -1737.0 | 1609 | 1459 | 1502 | 1495 | 1569 | 1559 | 1638 | 1623 | 1621 | 1607 | 1568 | 1141 | 1158 | 1129 | 587 | 516 | 570 | 547 | 525 | 476 | 469 | 437 | 427 | 374 | 362 | 332 | 396 | 408 | 378 | -104.728 | -116.95 | -61.749 | -76.587 | -97.818 | -121.175 | -133.192 | -143.152 | -165.423 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -12.7 | -9.7 | -9.5 | -13.9 | 9.6 | 8.4 | 8.6 | 8.4 | 23.9 | 23.5 | 24.9 | 24.5 | 24.6 | 24.1 | 23.1 | 17.1 | 18.4 | 17.9 | 9.9 | 8.8 | 9.9 | 9.5 | 9.7 | 8.7 | 8.7 | 8.1 | 7.8 | 7.1 | 8.7 | 8.1 | 9.6 | 11.3 | 11.3 | -3.8 | -4.3 | -2.7 | -3.5 | -5.5 | -7.7 | -8.5 | -9.6 | -11.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 3421 | 3517 | 3546 | 3512 | 3494 | 3594 | 3554 | 3601 | 3578 | 3608 | 3652 | 3708 | 3757 | 4114 |
| Percentage of StockholdersEquity | -210.7 | -275.0 | -278.3 | -202.2 | 217.2 | 246.3 | 236.6 | 240.9 | 228.0 | 231.4 | 222.9 | 228.4 | 231.8 | 262.3 |
| Percentage of Assets | 26.8 | 26.8 | 26.5 | 28.1 | 20.8 | 20.7 | 20.5 | 20.3 | 54.6 | 54.4 | 55.6 | 56.0 | 57.1 | 60.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 65.6 | 65.8 | 65.5 | 64.6 | 66.4 | 66.9 | 65.5 | 66.9 | 67.1 | 67.3 | 69.7 | 69.8 | 71.4 | 71.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -2406.0 | -2107.0 | -2098.0 | -2338.0 | 1220 | 1020 | 1069 | 1145 | -145.44 | -101.131 | -107.825 | -124.742 | -135.558 | -82.051 |
| Percentage of StockholdersEquity | 148.2 | 164.7 | 164.7 | 134.6 | 75.8 | 69.9 | 71.2 | 76.6 | -9.3 | -6.5 | -6.6 | -7.7 | -8.4 | -5.2 |
| Percentage of Assets | -18.8 | -16.0 | -15.7 | -18.7 | 7.3 | 5.9 | 6.2 | 6.4 | -2.2 | -1.5 | -1.6 | -1.9 | -2.1 | -1.2 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -32.5 | -27.4 | -26.3 | -32.4 | 10.8 | 9.1 | 9.2 | 9.3 | -33.0 | -20.0 | -21.2 | -24.7 | -28.3 | -16.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -1624.0 | -1278.0 | -1273.0 | -1737.0 | 1610 | 1460 | 1503 | 1495 | 1569 | 1559 | 1638 | 1623 | 1621 | 1568 |
| Percentage of StockholdersEquity | 100.0 | 99.9 | 99.9 | 100.0 | 100.1 | 100.1 | 100.1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -12.7 | -9.7 | -9.5 | -13.9 | 9.6 | 8.4 | 8.7 | 8.4 | 23.9 | 23.5 | 24.9 | 24.5 | 24.6 | 23.1 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | -287.9 | -179.2 | -220.6 | -408.7 | 68.4 | 66.3 | 63.7 | 63.8 | 98.2 | 99.1 | 100.0 | 100.0 | 99.8 | 99.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1254 | 1226 | 1261 | 1092 | 895 | 956 | 1060 | 977 | 1550 | 1485 | 1579 | 1580 | 1594 | 1498 |
| Percentage of StockholdersEquity | -77.2 | -95.9 | -99.0 | -62.9 | 55.6 | 65.5 | 70.6 | 65.4 | 98.8 | 95.3 | 96.4 | 97.3 | 98.4 | 95.5 |
| Percentage of Assets | 9.8 | 9.3 | 9.4 | 8.7 | 5.3 | 5.5 | 6.1 | 5.5 | 23.7 | 22.4 | 24.0 | 23.8 | 24.2 | 22.1 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 21.7 | 21.0 | 21.7 | 19.4 | 16.5 | 15.6 | 18.9 | 17.8 | 28.7 | 27.5 | 28.7 | 28.7 | 28.5 | 26.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -2269.0 | -2637.0 | -2710.0 | -2266.0 | -5610.0 | -5571.0 | -5684.0 | -5723.0 | -4982.865 | -4992.428 | -5124.122 | -5163.947 | -5216.388 | -5530.847 |
| Percentage of StockholdersEquity | 139.7 | 206.2 | 212.7 | 130.5 | -348.7 | -381.8 | -378.4 | -382.8 | -317.6 | -320.2 | -312.7 | -318.1 | -321.8 | -352.6 |
| Percentage of Assets | -17.8 | -20.1 | -20.3 | -18.2 | -33.5 | -32.1 | -32.7 | -32.2 | -76.0 | -75.3 | -78.0 | -77.9 | -79.3 | -81.5 |
| Percentage of Assets srt:ConsolidationEliminations | 36.7 | 40.9 | 42.4 | 36.4 | 74.1 | 74.2 | 73.9 | 74.3 | 80.2 | 80.5 | 81.0 | 81.6 | 81.8 | 83.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 2657 | 2970 | 3217 | 2541 | 2592 | 3069 | 2913 | 2903 | 1635 | 1683 | 1783 | 1790 | 1678 | 1714 | 1714 | 1589 | 1422 | 1440 | 905 | 790 | 678 | 682 | 701 | 672 | 543 | 533 | 526 | 573 | 763 | 785 | 697 | 587 | 806 | 292 | 304 | 289 | 230 | 222 | 209 | 245 | 246 | 238 |
| Percentage of AssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 20.8 | 22.6 | 24.0 | 20.4 | 15.5 | 17.7 | 16.8 | 16.3 | 25.0 | 25.4 | 27.1 | 27.0 | 25.5 | 25.7 | 25.3 | 23.8 | 22.6 | 22.8 | 15.2 | 13.5 | 11.7 | 11.9 | 12.9 | 12.3 | 10.1 | 9.9 | 9.7 | 10.8 | 18.2 | 19.1 | 16.8 | 16.2 | 24.1 | 10.7 | 11.2 | 12.9 | 10.7 | 12.5 | 13.3 | 15.7 | 16.5 | 16.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 133 | 152 | 141 | 94 |
| Percentage of AssetsCurrent | 5.0 | 5.1 | 4.4 | 3.2 |
| Percentage of Assets | 1.0 | 1.2 | 1.1 | 0.5 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 60.7 | 63.1 | 60.5 | 41.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 865 | 939 | 930 | 917 | 698 | 799 | 828 | 717 | 632 | 632 | 653 | 691 | 599 | 999 |
| Percentage of AssetsCurrent | 32.6 | 31.6 | 28.9 | 36.1 | 26.9 | 26.0 | 28.4 | 24.7 | 38.7 | 37.6 | 36.6 | 38.6 | 35.7 | 58.3 |
| Percentage of Assets | 6.8 | 7.2 | 6.9 | 7.3 | 4.2 | 4.6 | 4.8 | 4.0 | 9.7 | 9.5 | 9.9 | 10.4 | 9.1 | 14.7 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 16.6 | 17.6 | 17.2 | 16.9 | 13.3 | 14.9 | 15.3 | 13.3 | 11.9 | 11.8 | 12.5 | 13.0 | 11.4 | 17.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1275 | 1542 | 1863 | 1380 | 1723 | 1433 | 1732 | 1949 | 119 | 190 | 183 | 171 | 135 | 71 |
| Percentage of AssetsCurrent | 48.0 | 51.9 | 57.9 | 54.3 | 66.5 | 46.7 | 59.5 | 67.1 | 7.3 | 11.3 | 10.3 | 9.6 | 8.0 | 4.1 |
| Percentage of Assets | 10.0 | 11.7 | 13.9 | 11.1 | 10.3 | 8.3 | 10.0 | 11.0 | 1.8 | 2.9 | 2.8 | 2.6 | 2.1 | 1.0 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 17.2 | 20.0 | 23.4 | 19.1 | 15.2 | 12.8 | 14.8 | 15.9 | 27.2 | 37.7 | 36.2 | 34.0 | 28.2 | 14.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 8.0 | 4.0 | 7.0 | 9.0 | 12 | 2.0 | 5.0 | 6.0 | 4.511 | 1.547 | 3.235 | 4.392 | 4.105 | 3.034 |
| Percentage of AssetsCurrent | 0.3 | 0.1 | 0.2 | 0.4 | 0.5 | 0.1 | 0.2 | 0.2 | 0.3 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.4 | 0.6 | 1.2 | 2.1 | 0.5 | 0.1 | 0.2 | 0.3 | 0.3 | 0.1 | 0.2 | 0.3 | 0.3 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 594 | 558 | 504 | 317 | 254 | 887 | 398 | 257 | 904 | 880 | 967 | 952 | 966 | 651 |
| Percentage of AssetsCurrent | 22.4 | 18.8 | 15.7 | 12.5 | 9.8 | 28.9 | 13.7 | 8.9 | 55.3 | 52.3 | 54.2 | 53.2 | 57.6 | 38.0 |
| Percentage of Assets | 4.6 | 4.2 | 3.8 | 2.5 | 1.5 | 5.1 | 2.3 | 1.4 | 13.8 | 13.3 | 14.7 | 14.4 | 14.7 | 9.6 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 10.3 | 9.6 | 8.7 | 5.6 | 4.7 | 14.5 | 7.1 | 4.7 | 16.8 | 16.3 | 17.6 | 17.3 | 17.3 | 11.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -85.0 | -73.0 | -87.0 | -82.0 | -95.0 | -52.0 | -50.0 | -26.0 | -25.895 | -23.18 | -24.072 | -29.057 | -26.601 | -10.269 |
| Percentage of AssetsCurrent | -3.2 | -2.5 | -2.7 | -3.2 | -3.7 | -1.7 | -1.7 | -0.9 | -1.6 | -1.4 | -1.3 | -1.6 | -1.6 | -0.6 |
| Percentage of Assets | -0.7 | -0.6 | -0.7 | -0.7 | -0.6 | -0.3 | -0.3 | -0.1 | -0.4 | -0.3 | -0.4 | -0.4 | -0.4 | -0.2 |
| Percentage of Assets srt:ConsolidationEliminations | 1.4 | 1.1 | 1.4 | 1.3 | 1.3 | 0.7 | 0.6 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.4 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 493 | 369 |
| Percentage of AssetsCurrent | 15.3 | 12.7 |
| Percentage of Assets | 3.7 | 2.1 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 143 | 141 | 94 |
| Percentage of AssetsCurrent | 5.6 | 5.4 | 3.2 |
| Percentage of Assets | 1.1 | 0.8 | 0.5 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 60.3 | 52.6 | 41.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2009-12-31 | 2008-12-31 |
| Value | 964 | 941 | 1259 | 632 | 622 | 1342 | 1333 | 1399 | 929 | 975 | 1060 | 1022 | 1014 | 810 | 681 | 602 | 796 | 815 | 259 | 104 | 103 | 141 | 149 | 119 | 64 | 57 | 17 | 99 | 395 | 317 | 280 | 228 | 550 | 25 | 22 | 44 | 31 | 26 | 12 | 61 | 50 | 124 | 21 | 41 | 42 | 23 | 16 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 7.5 | 7.2 | 9.4 | 5.1 | 3.7 | 7.7 | 7.7 | 7.9 | 14.2 | 14.7 | 16.1 | 15.4 | 15.4 | 12.2 | 10.0 | 9.0 | 12.7 | 12.9 | 4.4 | 1.8 | 1.8 | 2.5 | 2.8 | 2.2 | 1.2 | 1.1 | 0.3 | 1.9 | 9.5 | 7.7 | 6.8 | 6.3 | 16.5 | 0.9 | 0.8 | 2.0 | 1.4 | 1.5 | 0.8 | 3.9 | 3.4 | 0.0 | 1.5 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 30 | 45 | 64 | 39 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 3.1 | 4.8 | 5.1 | 2.9 |
| Percentage of Assets | 0.2 | 0.3 | 0.5 | 0.2 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 13.7 | 18.7 | 27.5 | 17.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 2.0 | 4.0 | 4.0 | 3.0 | 3.0 | 3.0 | 9.0 | 2.995 | 3.431 | 19 | 11 | 10 | 12 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 0.2 | 0.4 | 0.6 | 0.5 | 0.2 | 0.2 | 0.6 | 0.3 | 0.4 | 1.9 | 1.1 | 1.0 | 1.8 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.1 | 0.3 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.4 | 0.2 | 0.2 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 425 | 433 | 801 | 366 | 451 | 499 | 973 | 1152 | 34 | 102 | 78 | 64 | 47 | 23 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 44.1 | 46.0 | 63.6 | 57.9 | 72.5 | 37.2 | 73.0 | 82.3 | 3.7 | 10.5 | 7.4 | 6.3 | 4.7 | 3.4 |
| Percentage of Assets | 3.3 | 3.3 | 6.0 | 2.9 | 2.7 | 2.9 | 5.6 | 6.5 | 0.5 | 1.5 | 1.2 | 1.0 | 0.7 | 0.3 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 5.7 | 5.6 | 10.0 | 5.1 | 4.0 | 4.5 | 8.3 | 9.4 | 7.8 | 20.2 | 15.5 | 12.8 | 10.0 | 4.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 537 | 504 | 458 | 262 | 168 | 840 | 357 | 238 | 891 | 869 | 961 | 946 | 956 | 645 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 55.7 | 53.6 | 36.4 | 41.5 | 27.0 | 62.6 | 26.8 | 17.0 | 96.0 | 89.2 | 90.7 | 92.5 | 94.3 | 94.8 |
| Percentage of Assets | 4.2 | 3.8 | 3.4 | 2.1 | 1.0 | 4.8 | 2.1 | 1.3 | 13.6 | 13.1 | 14.6 | 14.3 | 14.5 | 9.5 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 9.3 | 8.6 | 7.9 | 4.7 | 3.1 | 13.7 | 6.4 | 4.3 | 16.5 | 16.1 | 17.5 | 17.2 | 17.1 | 11.6 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 37 | 29 | 39 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 5.9 | 4.7 | 2.9 |
| Percentage of Assets | 0.3 | 0.2 | 0.2 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 15.6 | 10.8 | 17.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2015-12-31 |
| Value | 968 | 945 | 1262 | 633 | 622 | 1342 | 1333 | 1399 | 929 | 975 | 1060 | 1024 | 1016 | 1038 | 995 | 916 | 799 | 820 | 260 | 153 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 7.6 | 7.2 | 9.4 | 5.1 | 3.7 | 7.7 | 7.7 | 7.9 | 14.2 | 14.7 | 16.1 | 15.5 | 15.4 | 15.6 | 14.7 | 13.7 | 12.7 | 13.0 | 4.4 | 2.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2015-12-31 |
| Value | 3.0 | 5.0 | 4.0 | 3.0 | 3.0 | 3.0 | 9.0 | 2.995 | 3.431 | 19 | 11 | 10 | 234 | 323 | 210 | 16 | 10 | 0.235 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 0.3 | 0.5 | 0.6 | 0.5 | 0.2 | 0.2 | 0.6 | 0.3 | 0.4 | 1.9 | 1.1 | 1.0 | 22.6 | 32.5 | 22.9 | 2.0 | 4.2 | 0.2 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.1 | 0.3 | 0.2 | 0.2 | 3.5 | 4.8 | 3.1 | 0.3 | 0.2 | 0.0 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.4 | 0.2 | 0.2 | 0.0 | 5.6 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2015-12-31 |
| Value | 428 | 436 | 804 | 367 | 451 | 499 | 973 | 1152 | 34 | 102 | 78 | 66 | 49 | 12 | 26 | 155 | 27 | 17 | 33 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 44.2 | 46.1 | 63.7 | 58.0 | 72.5 | 37.2 | 73.0 | 82.3 | 3.7 | 10.5 | 7.4 | 6.4 | 4.9 | 1.2 | 2.7 | 16.9 | 3.4 | 6.5 | 22.1 |
| Percentage of Assets | 3.3 | 3.3 | 6.0 | 2.9 | 2.7 | 2.9 | 5.6 | 6.5 | 0.5 | 1.5 | 1.2 | 1.0 | 0.7 | 0.2 | 0.4 | 2.3 | 0.4 | 0.3 | 0.6 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 5.8 | 5.7 | 10.1 | 5.1 | 4.0 | 4.5 | 8.3 | 9.4 | 7.8 | 20.2 | 15.5 | 13.1 | 10.3 | 0.0 | 5.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 |
| Value | 537 | 504 | 458 | 262 | 168 | 840 | 357 | 238 | 891 | 869 | 961 | 946 | 956 | 790 | 645 | 551 | 755 | 232 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 55.5 | 53.3 | 36.3 | 41.4 | 27.0 | 62.6 | 26.8 | 17.0 | 96.0 | 89.2 | 90.7 | 92.4 | 94.1 | 76.2 | 64.8 | 60.2 | 94.5 | 89.3 |
| Percentage of Assets | 4.2 | 3.8 | 3.4 | 2.1 | 1.0 | 4.8 | 2.1 | 1.3 | 13.6 | 13.1 | 14.6 | 14.3 | 14.5 | 11.9 | 9.5 | 8.2 | 12.0 | 3.9 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 9.3 | 8.6 | 7.9 | 4.7 | 3.1 | 13.7 | 6.4 | 4.3 | 16.5 | 16.1 | 17.5 | 17.2 | 17.1 | 0.0 | 11.6 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1148 | 1058 | 1060 | 1108 | 985 | 1100 | 1132 | 1137 | 589 | 581 | 598 | 609 | 566 | 538 | 566 | 523 | 537 | 510 | 513 | 519 | 489 | 417 | 424 | 387 | 384 | 368 | 383 | 327 | 300 | 285 | 308 | 250 | 210 | 196 | 183 | 151 | 159 | 136 | 132 | 114 | 118 | 120 |
| Percentage of AccountsReceivableNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 9.0 | 8.1 | 7.9 | 8.9 | 5.9 | 6.3 | 6.5 | 6.4 | 9.0 | 8.8 | 9.1 | 9.2 | 8.6 | 8.1 | 8.3 | 7.8 | 8.5 | 8.1 | 8.6 | 8.9 | 8.5 | 7.3 | 7.8 | 7.1 | 7.1 | 6.8 | 7.0 | 6.2 | 7.2 | 6.9 | 7.4 | 6.9 | 6.3 | 7.2 | 6.7 | 6.7 | 7.4 | 7.7 | 8.5 | 7.3 | 7.9 | 8.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 252 | 229 | 228 | 124 |
| Percentage of AccountsReceivableNetCurrent | 22.0 | 21.6 | 21.5 | 11.2 |
| Percentage of Assets | 2.0 | 1.7 | 1.7 | 1.0 |
| Percentage of Assets sbgi:DiamondSportsFinanceSPVLLC sbgi:ARFacility us-gaap:LineOfCredit | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 85 | 57 | 70 | 39 |
| Percentage of AccountsReceivableNetCurrent | 7.4 | 5.4 | 6.6 | 3.4 |
| Percentage of Assets | 0.7 | 0.4 | 0.5 | 0.2 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 38.8 | 23.7 | 30.0 | 17.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 540 | 546 | 558 | 510 | 494 | 538 | 561 | 530 | 538 | 528 | 530 | 542 | 507 | 530 |
| Percentage of AccountsReceivableNetCurrent | 47.0 | 51.6 | 52.6 | 46.0 | 50.2 | 48.9 | 49.6 | 46.6 | 91.3 | 90.8 | 88.6 | 89.0 | 89.6 | 93.6 |
| Percentage of Assets | 4.2 | 4.2 | 4.2 | 4.1 | 2.9 | 3.1 | 3.2 | 3.0 | 8.2 | 8.0 | 8.1 | 8.2 | 7.7 | 7.8 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 10.4 | 10.2 | 10.3 | 9.4 | 9.4 | 10.0 | 10.3 | 9.8 | 10.1 | 9.9 | 10.1 | 10.2 | 9.6 | 9.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 608 | 512 | 502 | 598 | 491 | 561 | 571 | 607 | 51 | 53 | 68 | 67 | 58 | 36 |
| Percentage of AccountsReceivableNetCurrent | 53.0 | 48.4 | 47.4 | 54.0 | 49.8 | 51.0 | 50.4 | 53.4 | 8.7 | 9.2 | 11.4 | 11.0 | 10.4 | 6.4 |
| Percentage of Assets | 4.8 | 3.9 | 3.8 | 4.8 | 2.9 | 3.2 | 3.3 | 3.4 | 0.8 | 0.8 | 1.0 | 1.0 | 0.9 | 0.5 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 8.2 | 6.7 | 6.3 | 8.3 | 4.3 | 5.0 | 4.9 | 5.0 | 11.6 | 10.5 | 13.4 | 13.3 | 12.3 | 7.1 |
| Period End | 2020-12-31 |
| Value | 228 |
| Percentage of AccountsReceivableNetCurrent | 21.5 |
| Percentage of Assets | 1.7 |
| Percentage of Assets sbgi:ARFacility us-gaap:LineOfCredit | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 89 | 37 | 39 |
| Percentage of AccountsReceivableNetCurrent | 8.0 | 3.8 | 3.4 |
| Percentage of Assets | 0.7 | 0.2 | 0.2 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 37.6 | 13.8 | 17.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 545 | 971 | 898 | 801 | 985 | 627 | 448 | 367 | 116 | 126 | 124 | 158 | 97 | 139 | 153 | 151 | 89 | 115 | 131 | 165 | 84 | 123 | 127 | 165 | 94 | 107 | 118 | 146 | 66 | 84 | 108 | 102 | 45 | 53 | 67 | 77 | 38 | 63 |
| Percentage of OtherAssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.3 | 7.4 | 6.7 | 6.4 | 5.9 | 3.6 | 2.6 | 2.1 | 1.8 | 1.9 | 1.9 | 2.4 | 1.5 | 2.1 | 2.3 | 2.3 | 1.4 | 1.8 | 2.2 | 2.8 | 1.5 | 2.2 | 2.3 | 3.0 | 1.8 | 2.0 | 2.2 | 2.8 | 1.6 | 2.1 | 2.6 | 2.8 | 1.4 | 1.9 | 2.5 | 3.5 | 1.8 | 4.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 323 | 389 | 372 | 403 | 201 | 258 | 264 | 178 | 91 | 101 | 103 | 137 | 81 | 145 |
| Percentage of OtherAssetsCurrent | 59.3 | 40.1 | 41.4 | 50.3 | 20.4 | 41.1 | 58.9 | 48.5 | 78.0 | 80.1 | 82.5 | 86.8 | 83.6 | 94.7 |
| Percentage of Assets | 2.5 | 3.0 | 2.8 | 3.2 | 1.2 | 1.5 | 1.5 | 1.0 | 1.4 | 1.5 | 1.6 | 2.1 | 1.2 | 2.1 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 6.2 | 7.3 | 6.9 | 7.4 | 3.8 | 4.8 | 4.9 | 3.3 | 1.7 | 1.9 | 2.0 | 2.6 | 1.6 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 242 | 597 | 560 | 416 | 781 | 373 | 188 | 190 | 34 | 35 | 37 | 39 | 28 | 9.687 |
| Percentage of OtherAssetsCurrent | 44.4 | 61.5 | 62.4 | 51.9 | 79.3 | 59.5 | 42.0 | 51.8 | 29.4 | 28.2 | 29.7 | 25.2 | 29.0 | 6.3 |
| Percentage of Assets | 1.9 | 4.5 | 4.2 | 3.3 | 4.7 | 2.1 | 1.1 | 1.1 | 0.5 | 0.5 | 0.6 | 0.6 | 0.4 | 0.1 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 3.3 | 7.8 | 7.0 | 5.8 | 6.9 | 3.3 | 1.6 | 1.5 | 7.8 | 7.0 | 7.3 | 7.9 | 5.9 | 1.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 8.0 | 4.0 | 7.0 | 9.0 | 12 | 2.0 | 5.0 | 6.0 | 4.511 | 1.547 | 3.235 | 4.392 | 4.105 | 3.034 |
| Percentage of OtherAssetsCurrent | 1.5 | 0.4 | 0.8 | 1.1 | 1.2 | 0.3 | 1.1 | 1.6 | 3.9 | 1.2 | 2.6 | 2.8 | 4.2 | 2.0 |
| Percentage of Assets | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.4 | 0.6 | 1.2 | 2.1 | 0.5 | 0.1 | 0.2 | 0.3 | 0.3 | 0.1 | 0.2 | 0.3 | 0.3 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 57 | 54 | 46 | 55 | 86 | 46 | 41 | 19 | 12 | 11 | 5.548 | 5.695 | 10 | 5.758 |
| Percentage of OtherAssetsCurrent | 10.5 | 5.6 | 5.1 | 6.9 | 8.7 | 7.3 | 9.2 | 5.2 | 10.8 | 8.8 | 4.4 | 3.6 | 10.4 | 3.7 |
| Percentage of Assets | 0.4 | 0.4 | 0.3 | 0.4 | 0.5 | 0.3 | 0.2 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.1 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 1.0 | 0.9 | 0.8 | 1.0 | 1.6 | 0.8 | 0.7 | 0.3 | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -85.0 | -73.0 | -87.0 | -82.0 | -95.0 | -52.0 | -50.0 | -26.0 | -25.895 | -23.18 | -24.072 | -29.057 | -26.601 | -10.269 |
| Percentage of OtherAssetsCurrent | -15.6 | -7.5 | -9.7 | -10.2 | -9.6 | -8.3 | -11.2 | -7.1 | -22.2 | -18.3 | -19.3 | -18.4 | -27.2 | -6.7 |
| Percentage of Assets | -0.7 | -0.6 | -0.7 | -0.7 | -0.6 | -0.3 | -0.3 | -0.1 | -0.4 | -0.3 | -0.4 | -0.4 | -0.4 | -0.2 |
| Percentage of Assets srt:ConsolidationEliminations | 1.4 | 1.1 | 1.4 | 1.3 | 1.3 | 0.7 | 0.6 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.4 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 175 | 194 | 170 | 218 | 150 | 152 | 287 | 237 | 86 | 84 | 60 | 70 | 78 | 68 | 54 | 37 | 36 | 41 | 36 | 37 | 38 | 52 | 26 | 35 | 41 | 33 | 21 | 32 | 25 | 25 | 30 | 14 | 11 | 9.936 | 7.404 | 9.112 | 8.444 | 18 | 17 | 8.244 | 8.875 | 5.996 |
| Percentage of PrepaidExpenseAndOtherAssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.4 | 1.5 | 1.3 | 1.7 | 0.9 | 0.9 | 1.7 | 1.3 | 1.3 | 1.3 | 0.9 | 1.1 | 1.2 | 1.0 | 0.8 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.9 | 0.5 | 0.7 | 0.8 | 0.6 | 0.4 | 0.6 | 0.6 | 0.6 | 0.7 | 0.4 | 0.4 | 0.4 | 0.3 | 0.4 | 0.4 | 1.1 | 1.1 | 0.5 | 0.6 | 0.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 3.0 | 4.0 | 5.0 | 6.0 |
| Percentage of PrepaidExpenseAndOtherAssetsCurrent | 1.7 | 2.1 | 2.9 | 2.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 1.4 | 1.7 | 2.1 | 2.6 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 7.0 | 3.0 | 6.0 |
| Percentage of PrepaidExpenseAndOtherAssetsCurrent | 3.2 | 2.0 | 2.1 |
| Percentage of Assets | 0.1 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 3.0 | 1.1 | 2.6 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 4219 | 4056 |
| Percentage of AssetsNoncurrent | 100.0 | 100.0 |
| Percentage of Assets | 31.5 | 23.4 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 1688 | 1558 | 1453 | 1486 | 1402 | 1304 | 1273 | 1037 | 828 | 630 |
| Percentage of PropertyPlantAndEquipmentGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 12.6 | 9.0 | 22.1 | 21.9 | 23.5 | 24.0 | 23.3 | 25.0 | 30.4 | 40.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 66 | 64 | 62 | 63 | 56 | 47 | 37 | 23 | 20 | 12 |
| Percentage of PropertyPlantAndEquipmentGross | 3.9 | 4.1 | 4.3 | 4.3 | 4.0 | 3.6 | 3.0 | 2.3 | 2.5 | 2.0 |
| Percentage of Assets | 0.5 | 0.4 | 1.0 | 0.9 | 0.9 | 0.9 | 0.7 | 0.6 | 0.8 | 0.8 |
| Percentage of Assets sbgi:AutomotiveEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 939 | 781 | 744 |
| Percentage of PropertyPlantAndEquipmentGross | 55.6 | 50.1 | 51.2 |
| Percentage of Assets | 7.0 | 4.5 | 11.3 |
| Percentage of Assets sbgi:OperatingEquipment | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 25 | 26 | 34 | 87 | 90 | 91 | 113 | 67 | 56 | 55 |
| Percentage of PropertyPlantAndEquipmentGross | 1.5 | 1.7 | 2.4 | 5.9 | 6.4 | 7.0 | 8.9 | 6.5 | 6.8 | 8.8 |
| Percentage of Assets | 0.2 | 0.1 | 0.5 | 1.3 | 1.5 | 1.7 | 2.1 | 1.6 | 2.1 | 3.5 |
| Percentage of Assets sbgi:RealEstateHeldForDevelopmentAndSale | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 59 | 53 | 53 | 53 | 84 | 84 | 81 | 81 | 79 | 79 |
| Percentage of PropertyPlantAndEquipmentGross | 3.5 | 3.4 | 3.7 | 3.6 | 6.0 | 6.5 | 6.4 | 7.9 | 9.5 | 12.6 |
| Percentage of Assets | 0.4 | 0.3 | 0.8 | 0.8 | 1.4 | 1.6 | 1.5 | 2.0 | 2.9 | 5.0 |
| Percentage of Assets us-gaap:AssetsHeldUnderCapitalLeases | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 307 | 293 | 278 | 260 | 239 | 210 | 192 | 168 | 135 | 98 |
| Percentage of PropertyPlantAndEquipmentGross | 18.2 | 18.8 | 19.2 | 17.5 | 17.1 | 16.1 | 15.1 | 16.2 | 16.3 | 15.6 |
| Percentage of Assets | 2.3 | 1.7 | 4.2 | 3.8 | 4.0 | 3.9 | 3.5 | 4.1 | 5.0 | 6.3 |
| Percentage of Assets us-gaap:BuildingAndBuildingImprovements | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 36 | 116 | 71 | 30 | 30 | 34 | 18 | 17 | 18 | 6.647 |
| Percentage of PropertyPlantAndEquipmentGross | 2.1 | 7.4 | 4.9 | 2.1 | 2.2 | 2.7 | 1.5 | 1.6 | 2.2 | 1.1 |
| Percentage of Assets | 0.3 | 0.7 | 1.1 | 0.5 | 0.5 | 0.6 | 0.3 | 0.4 | 0.7 | 0.4 |
| Percentage of Assets us-gaap:ConstructionInProgress | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 123 | 114 | 107 | 109 | 101 | 85 | 70 | 50 | 41 | 37 |
| Percentage of PropertyPlantAndEquipmentGross | 7.3 | 7.3 | 7.4 | 7.4 | 7.2 | 6.5 | 5.5 | 4.8 | 5.0 | 5.9 |
| Percentage of Assets | 0.9 | 0.7 | 1.6 | 1.6 | 1.7 | 1.6 | 1.3 | 1.2 | 1.5 | 2.4 |
| Percentage of Assets us-gaap:FurnitureAndFixtures | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 74 | 75 | 76 | 77 | 73 | 60 | 55 | 37 | 33 | 20 |
| Percentage of PropertyPlantAndEquipmentGross | 4.4 | 4.8 | 5.3 | 5.2 | 5.2 | 4.7 | 4.3 | 3.6 | 4.1 | 3.2 |
| Percentage of Assets | 0.6 | 0.4 | 1.2 | 1.1 | 1.2 | 1.1 | 1.0 | 0.9 | 1.2 | 1.3 |
| Percentage of Assets us-gaap:LandAndLandImprovements | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 59 | 36 | 24 | 25 | 24 | 22 | 19 | 19 | 18 | 14 |
| Percentage of PropertyPlantAndEquipmentGross | 3.5 | 2.3 | 1.7 | 1.7 | 1.8 | 1.7 | 1.5 | 1.9 | 2.2 | 2.3 |
| Percentage of Assets | 0.4 | 0.2 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.7 | 0.9 |
| Percentage of Assets us-gaap:LeaseholdImprovements | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 865 | 793 | 770 | 748 | 685 | 587 | 520 | 441 | 389 | 348 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 6.5 | 4.6 | 11.7 | 11.0 | 11.5 | 10.8 | 9.5 | 10.6 | 14.3 | 22.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | 119 | 125 | 123 | 149 | 150 | 150 | 144 | 96 | 43 | 43 | 43 | 44 | 43 | 43 | 46 | 43 | 43 | 45 | 46 | 47 | 45 | 43 | 42 | 40 | 39 | 39 | 41 | 34 | 24 | 24 | 22 | 17 | 15 | 16 | 11 | 10 | 10 | 5.819 | 4.028 | 4.393 | 4.614 |
| Percentage of AmortizationOfIntangibleAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 789 | 804 | 823 | 814 | 809 | 786 | 765 | 740 | 699 | 687 | 683 | 674 | 666 | 654 | 738 | 724 | 705 | 712 | 717 | 713 | 727 | 723 | 717 | 746 | 741 | 742 | 752 | 712 | 636 | 574 | 596 | 513 | 454 | 431 | 439 | 365 | 372 | 314 | 281 | 276 | 277 | 272 |
| Percentage of PropertyPlantAndEquipmentNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 6.2 | 6.1 | 6.2 | 6.5 | 4.8 | 4.5 | 4.4 | 4.2 | 10.7 | 10.4 | 10.4 | 10.2 | 10.1 | 9.8 | 10.9 | 10.8 | 11.2 | 11.3 | 12.0 | 12.2 | 12.6 | 12.6 | 13.2 | 13.6 | 13.8 | 13.7 | 13.8 | 13.5 | 15.2 | 14.0 | 14.4 | 14.2 | 13.6 | 15.8 | 16.1 | 16.3 | 17.2 | 17.8 | 17.9 | 17.7 | 18.5 | 18.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 15 | 15 | 16 | 15 |
| Percentage of PropertyPlantAndEquipmentNet | 1.9 | 1.9 | 1.9 | 2.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 6.8 | 6.2 | 6.9 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 674 | 691 | 706 | 704 | 702 | 678 | 659 | 631 | 612 | 596 | 593 | 589 | 574 | 586 |
| Percentage of PropertyPlantAndEquipmentNet | 85.4 | 85.9 | 85.8 | 86.5 | 86.8 | 86.3 | 86.1 | 85.3 | 87.5 | 86.7 | 86.9 | 87.4 | 86.2 | 79.5 |
| Percentage of Assets | 5.3 | 5.3 | 5.3 | 5.6 | 4.2 | 3.9 | 3.8 | 3.5 | 9.3 | 9.0 | 9.0 | 8.9 | 8.7 | 8.7 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 12.9 | 12.9 | 13.0 | 13.0 | 13.3 | 12.6 | 12.1 | 11.7 | 11.5 | 11.1 | 11.3 | 11.1 | 10.9 | 10.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 106 | 106 | 109 | 104 | 100 | 98 | 96 | 97 | 71 | 74 | 70 | 65 | 70 | 132 |
| Percentage of PropertyPlantAndEquipmentNet | 13.4 | 13.2 | 13.2 | 12.8 | 12.4 | 12.5 | 12.5 | 13.1 | 10.3 | 10.8 | 10.3 | 9.7 | 10.6 | 17.9 |
| Percentage of Assets | 0.8 | 0.8 | 0.8 | 0.8 | 0.6 | 0.6 | 0.6 | 0.5 | 1.1 | 1.1 | 1.1 | 1.0 | 1.1 | 1.9 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 1.4 | 1.4 | 1.4 | 1.4 | 0.9 | 0.9 | 0.8 | 0.8 | 16.3 | 14.6 | 13.8 | 13.0 | 14.7 | 26.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.723 | 0.734 | 0.754 | 0.773 | 0.791 | 0.829 |
| Percentage of PropertyPlantAndEquipmentNet | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.2 | 0.1 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 32 | 31 | 33 | 32 | 33 | 35 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 31 |
| Percentage of PropertyPlantAndEquipmentNet | 4.1 | 3.9 | 4.0 | 3.9 | 4.1 | 4.5 | 4.1 | 4.2 | 4.5 | 4.6 | 4.7 | 4.7 | 4.8 | 4.2 |
| Percentage of Assets | 0.3 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 0.6 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -24.0 | -25.0 | -26.0 | -27.0 | -27.0 | -26.0 | -22.0 | -20.0 | -16.643 | -15.275 | -13.371 | -13.054 | -11.712 | -12.602 |
| Percentage of PropertyPlantAndEquipmentNet | -3.0 | -3.1 | -3.2 | -3.3 | -3.3 | -3.3 | -2.9 | -2.7 | -2.4 | -2.2 | -2.0 | -1.9 | -1.8 | -1.7 |
| Percentage of Assets | -0.2 | -0.2 | -0.2 | -0.2 | -0.2 | -0.1 | -0.1 | -0.1 | -0.3 | -0.2 | -0.2 | -0.2 | -0.2 | -0.2 |
| Percentage of Assets srt:ConsolidationEliminations | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 17 | 16 | 15 |
| Percentage of PropertyPlantAndEquipmentNet | 2.1 | 2.0 | 2.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 7.2 | 6.0 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 454 | 528 | 430 | 331 | 2258 | 2120 | 2270 | 2263 | 1546 | 1524 | 1604 | 1587 | 1589 | 1537 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.6 | 4.0 | 3.2 | 2.7 | 13.5 | 12.2 | 13.1 | 12.7 | 23.6 | 23.0 | 24.4 | 24.0 | 24.2 | 22.7 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 80.5 | 74.1 | 74.5 | 77.9 | 95.9 | 96.3 | 96.3 | 96.5 | 96.8 | 96.9 | 97.9 | 97.8 | 97.8 | 97.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 3424 | 3519 | 3549 | 3516 | 3497 | 3595 | 3558 | 3601 | 3579 | 3608 | 3654 | 3707 | 3756 | 4116 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | 754.2 | 666.5 | 825.3 | 1062.2 | 154.9 | 169.6 | 156.7 | 159.1 | 231.4 | 236.7 | 227.8 | 233.6 | 236.3 | 267.8 |
| Percentage of Assets | 26.8 | 26.8 | 26.5 | 28.2 | 20.9 | 20.7 | 20.5 | 20.3 | 54.6 | 54.4 | 55.6 | 55.9 | 57.1 | 60.7 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 59.2 | 60.4 | 61.1 | 62.4 | 64.6 | 58.7 | 63.6 | 65.6 | 66.3 | 66.8 | 66.4 | 67.3 | 67.2 | 73.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -3878.0 | -4047.0 | -3979.0 | -3847.0 | -5755.0 | -5715.0 | -5828.0 | -5864.0 | -5126.046 | -5133.658 | -5262.676 | -5299.146 | -5350.553 | -5657.757 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | -854.2 | -766.5 | -925.3 | -1162.2 | -254.9 | -269.6 | -256.7 | -259.1 | -331.4 | -336.7 | -328.0 | -333.9 | -336.5 | -368.0 |
| Percentage of Assets | -30.3 | -30.8 | -29.7 | -30.8 | -34.3 | -32.9 | -33.6 | -33.0 | -78.2 | -77.4 | -80.1 | -80.0 | -81.3 | -83.4 |
| Percentage of Assets srt:ConsolidationEliminations | 62.7 | 62.8 | 62.3 | 61.7 | 76.0 | 76.1 | 75.7 | 76.2 | 82.5 | 82.7 | 83.2 | 83.8 | 83.9 | 85.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 2088 | 2091 | 2092 | 2092 | 4716 | 4716 | 4716 | 4048 | 2123 | 2123 | 2123 | 2125 | 2022 | 2021 | 2124 | 2113 | 2002 | 1998 | 1990 | 1989 | 2017 | 2081 | 1931 | 1951 | 1951 | 1951 | 1964 | 1820 | 1341 | 1336 | 1380 | 1297 | 1105 | 1067 | 1074 | 908 | 912 | 728 | 660 | 660 | 659 | 659 |
| Percentage of Goodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 16.3 | 15.9 | 15.6 | 16.8 | 28.1 | 27.2 | 27.2 | 22.8 | 32.4 | 32.0 | 32.3 | 32.1 | 30.7 | 30.3 | 31.3 | 31.6 | 31.8 | 31.6 | 33.4 | 33.9 | 34.9 | 36.2 | 35.5 | 35.6 | 36.3 | 36.0 | 36.0 | 34.4 | 32.1 | 32.5 | 33.3 | 35.9 | 33.1 | 39.0 | 39.3 | 40.4 | 42.3 | 41.1 | 42.0 | 42.2 | 44.1 | 44.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-08-23 |
| Value | 2615 | 2615 | 1924 |
| Percentage of Goodwill | 125.0 | 55.4 | 0.0 |
| Percentage of Assets | 19.5 | 15.1 | 0.0 |
| Percentage of Assets sbgi:RegionalSportsNetworksAndFoxCollegeSportsRSNs | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 2081 | 2081 | 2082 | 2082 | 2091 | 2091 | 2091 | 2120 | 2120 | 2120 | 2120 | 2121 | 2018 | 2120 |
| Percentage of Goodwill | 99.7 | 99.5 | 99.5 | 99.5 | 44.3 | 44.3 | 44.3 | 52.4 | 99.8 | 99.8 | 99.8 | 99.8 | 99.8 | 99.8 |
| Percentage of Assets | 16.3 | 15.8 | 15.6 | 16.7 | 12.5 | 12.0 | 12.0 | 11.9 | 32.3 | 32.0 | 32.3 | 32.0 | 30.7 | 31.3 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 39.9 | 38.9 | 38.5 | 38.3 | 39.7 | 38.9 | 38.5 | 39.4 | 39.8 | 39.6 | 40.4 | 39.9 | 38.3 | 36.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 7.0 | 10.0 | 10.0 | 10.0 | 2625 | 2625 | 2625 | 1928 | 3.867 | 3.867 | 3.867 | 3.867 | 3.867 | 3.867 |
| Percentage of Goodwill | 0.3 | 0.5 | 0.5 | 0.5 | 55.7 | 55.7 | 55.7 | 47.6 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 15.7 | 15.1 | 15.1 | 10.8 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 0.1 | 0.1 | 0.1 | 0.1 | 23.2 | 23.5 | 22.5 | 15.7 | 0.9 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 2017 | 2026 |
| Percentage of Goodwill | 96.4 | 43.0 |
| Percentage of Assets | 15.1 | 11.7 |
| Percentage of Assets us-gaap:OperatingSegments sbgi:BroadcastSegment | 41.1 | 41.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 2017 | 2026 | 2055 |
| Percentage of Goodwill | 96.4 | 43.0 | 96.8 |
| Percentage of Assets | 15.1 | 11.7 | 31.3 |
| Percentage of Assets sbgi:BroadcastSegment | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 75 | 75 | 69 | 70 | 56 | 3.488 | 3.488 | 3.488 | 0.513 | 3.488 | 3.488 | 3.488 |
| Percentage of Goodwill | 3.6 | 1.6 | 3.3 | 3.3 | 2.9 | 0.2 | 0.2 | 0.2 | 0.0 | 0.3 | 0.3 | 0.5 |
| Percentage of Assets | 0.6 | 0.4 | 1.1 | 1.0 | 1.0 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.2 |
| Percentage of Assets us-gaap:AllOtherSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2014-12-31 |
| Value | 150 | 150 | 171 | 163 | 163 | 158 | 158 | 158 | 158 | 158 | 158 | 158 | 156 | 156 | 159 | 168 | 160 | 157 | 156 | 153 | 157 | 167 | 132 | 135 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.2 | 1.1 | 1.3 | 1.3 | 1.0 | 0.9 | 0.9 | 0.9 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.3 | 2.5 | 2.5 | 2.5 | 2.6 | 2.6 | 2.7 | 2.9 | 2.4 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 136 | 136 | 156 | 149 | 149 | 144 | 144 | 144 | 143 | 143 | 143 | 143 | 142 | 145 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill | 90.7 | 90.7 | 91.2 | 91.4 | 91.4 | 91.1 | 91.1 | 91.1 | 90.9 | 90.9 | 91.0 | 91.0 | 90.9 | 91.0 |
| Percentage of Assets | 1.1 | 1.0 | 1.2 | 1.2 | 0.9 | 0.8 | 0.8 | 0.8 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.1 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 2.6 | 2.5 | 2.9 | 2.7 | 2.8 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill | 9.3 | 9.3 | 8.8 | 8.6 | 8.6 | 8.9 | 8.9 | 8.9 | 9.1 | 9.1 | 9.0 | 9.0 | 9.1 | 9.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 3.3 | 2.9 | 2.8 | 2.8 | 3.0 | 2.8 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 144 | 131 | 131 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill | 84.2 | 82.9 | 82.8 |
| Percentage of Assets | 1.1 | 0.8 | 2.0 |
| Percentage of Assets sbgi:BroadcastSegment | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 27 | 27 | 27 | 27 | 23 | 0.0 | 0.0 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill | 15.8 | 17.1 | 17.3 | 17.2 | 15.0 | 0.0 | 0.0 |
| Percentage of Assets | 0.2 | 0.2 | 0.4 | 0.4 | 0.4 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AllOtherSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 5347 | 5500 | 5624 | 5747 | 7664 | 7814 | 7977 | 9104 | 1540 | 1584 | 1626 | 1670 | 1686 | 1729 | 1801 | 1841 | 1725 | 1757 | 1944 | 1983 | 1975 | 1861 | 1751 | 1763 | 1792 | 1822 | 1818 | 1652 | 1081 | 1077 | 1127 | 819 | 656 | 624 | 623 | 379 | 391 | 266 | 175 | 178 | 143 | 150 |
| Percentage of FiniteLivedIntangibleAssetsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 41.8 | 41.9 | 42.0 | 46.0 | 45.7 | 45.0 | 45.9 | 51.2 | 23.5 | 23.9 | 24.8 | 25.2 | 25.6 | 26.0 | 26.6 | 27.5 | 27.4 | 27.8 | 32.6 | 33.8 | 34.2 | 32.4 | 32.2 | 32.2 | 33.3 | 33.6 | 33.3 | 31.2 | 25.9 | 26.2 | 27.2 | 22.7 | 19.6 | 22.9 | 22.8 | 16.9 | 18.1 | 15.1 | 11.2 | 11.4 | 9.6 | 10.1 |
| Period End | 2020-09-30 |
| Value | 3756 |
| Percentage of FiniteLivedIntangibleAssetsNet | 65.4 |
| Percentage of Assets | 30.1 |
| Percentage of Assets sbgi:RegionalSportsNetworksAndFoxCollegeSportsRSNs us-gaap:CustomerRelationships | 0.0 |
| Period End | 2020-09-30 |
| Value | 673 |
| Percentage of FiniteLivedIntangibleAssetsNet | 11.7 |
| Percentage of Assets | 5.4 |
| Percentage of Assets sbgi:RegionalSportsNetworksAndFoxCollegeSportsRSNs us-gaap:OtherIntangibleAssets | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 50 | 52 | 54 | 93 |
| Percentage of FiniteLivedIntangibleAssetsNet | 0.9 | 0.9 | 1.0 | 1.2 |
| Percentage of Assets | 0.4 | 0.4 | 0.4 | 0.5 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 22.8 | 21.6 | 23.2 | 40.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1183 | 1224 | 1256 | 1299 | 1342 | 1384 | 1426 | 1481 | 1523 | 1566 | 1608 | 1651 | 1666 | 1781 |
| Percentage of FiniteLivedIntangibleAssetsNet | 22.1 | 22.3 | 22.3 | 22.6 | 17.5 | 17.7 | 17.9 | 16.3 | 98.9 | 98.9 | 98.9 | 98.9 | 98.8 | 98.9 |
| Percentage of Assets | 9.3 | 9.3 | 9.4 | 10.4 | 8.0 | 8.0 | 8.2 | 8.3 | 23.2 | 23.6 | 24.5 | 24.9 | 25.3 | 26.3 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 22.7 | 22.9 | 23.2 | 23.9 | 25.5 | 25.8 | 26.3 | 27.5 | 28.6 | 29.2 | 30.7 | 31.1 | 31.7 | 31.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 4203 | 4316 | 4409 | 4491 | 6366 | 6476 | 6598 | 7671 | 66 | 68 | 70 | 72 | 74 | 77 |
| Percentage of FiniteLivedIntangibleAssetsNet | 78.6 | 78.5 | 78.4 | 78.1 | 83.1 | 82.9 | 82.7 | 84.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.3 |
| Percentage of Assets | 32.9 | 32.9 | 32.9 | 36.0 | 38.0 | 37.3 | 38.0 | 43.1 | 1.0 | 1.0 | 1.1 | 1.1 | 1.1 | 1.1 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 56.8 | 56.1 | 55.3 | 62.2 | 56.3 | 58.0 | 56.5 | 62.6 | 15.0 | 13.5 | 13.9 | 14.3 | 15.5 | 15.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -39.0 | -40.0 | -41.0 | -43.0 | -44.0 | -46.0 | -47.0 | -48.0 | -49.457 | -50.794 | -52.277 | -53.616 | -54.969 | -57.319 |
| Percentage of FiniteLivedIntangibleAssetsNet | -0.7 | -0.7 | -0.7 | -0.7 | -0.6 | -0.6 | -0.6 | -0.5 | -3.2 | -3.2 | -3.2 | -3.2 | -3.3 | -3.2 |
| Percentage of Assets | -0.3 | -0.3 | -0.3 | -0.3 | -0.3 | -0.3 | -0.3 | -0.3 | -0.8 | -0.8 | -0.8 | -0.8 | -0.8 | -0.8 |
| Percentage of Assets srt:ConsolidationEliminations | 0.6 | 0.6 | 0.6 | 0.7 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2011-12-31 |
| Value | 663 | 752 | 847 | 937 | 970 | 1034 | 1075 | 1085 | 1139 | 674 | 420 | 248 | 103 |
| Percentage of FiniteLivedIntangibleAssetsNet | 11.8 | 9.4 | 52.1 | 52.0 | 49.9 | 59.1 | 61.0 | 60.5 | 62.7 | 59.8 | 67.5 | 65.5 | 59.1 |
| Percentage of Assets | 5.0 | 4.3 | 12.9 | 13.8 | 16.3 | 19.0 | 19.6 | 20.2 | 20.9 | 16.3 | 15.4 | 11.1 | 6.6 |
| Percentage of Assets sbgi:NetworkAffiliations | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 9.0 | 18 | 7.0 |
| Percentage of FiniteLivedIntangibleAssetsNet | 0.2 | 0.2 | 0.4 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets sbgi:OtherFiniteLivedIntangibleAssets | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 666 | 1228 |
| Percentage of FiniteLivedIntangibleAssetsNet | 11.8 | 15.4 |
| Percentage of Assets | 5.0 | 7.1 |
| Percentage of Assets sbgi:SportsContracts | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 |
| Value | 4091 | 4189 | 4286 | 4384 | 5728 | 5853 | 5979 | 772 | 855 | 808 | 581 | 547 | 567 | 571 |
| Percentage of FiniteLivedIntangibleAssetsNet | 76.5 | 76.2 | 76.2 | 76.3 | 74.7 | 74.9 | 75.0 | 47.5 | 47.5 | 41.6 | 33.2 | 31.0 | 31.6 | 31.4 |
| Percentage of Assets | 32.0 | 31.9 | 32.0 | 35.1 | 34.2 | 33.7 | 34.4 | 11.8 | 12.6 | 13.6 | 10.7 | 10.0 | 10.5 | 10.5 |
| Percentage of Assets us-gaap:CustomerRelationships | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2011-12-31 |
| Value | 1256 | 1311 | 1338 | 1363 | 1936 | 1961 | 1998 | 7.421 | 9.542 | 164 | 135 | 140 | 140 | 503 | 328 | 146 | 96 | 65 |
| Percentage of FiniteLivedIntangibleAssetsNet | 23.5 | 23.8 | 23.8 | 23.7 | 25.3 | 25.1 | 25.0 | 0.5 | 0.5 | 8.5 | 7.7 | 8.0 | 7.8 | 27.7 | 29.2 | 23.5 | 25.4 | 37.2 |
| Percentage of Assets | 9.8 | 10.0 | 10.0 | 10.9 | 11.5 | 11.3 | 11.5 | 0.1 | 0.1 | 2.8 | 2.5 | 2.6 | 2.6 | 9.2 | 7.9 | 5.4 | 4.3 | 4.1 |
| Percentage of Assets us-gaap:OtherIntangibleAssets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 |
| Value | 671 |
| Percentage of FiniteLivedIntangibleAssetsNet | 11.9 |
| Percentage of Assets | 5.0 |
| Percentage of Assets sbgi:OtherFiniteLivedIntangibleAssets sbgi:LocalSportsSegment | 0.0 |
| Period End | 2020-12-31 |
| Value | 3679 |
| Percentage of FiniteLivedIntangibleAssetsNet | 65.4 |
| Percentage of Assets | 27.5 |
| Percentage of Assets us-gaap:CustomerRelationships sbgi:LocalSportsSegment | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 55 | 85 | 93 |
| Percentage of FiniteLivedIntangibleAssetsNet | 1.0 | 1.1 | 1.2 |
| Percentage of Assets | 0.4 | 0.5 | 0.5 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 23.2 | 31.7 | 40.8 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 15 | 18 | 15 |
| Percentage of IntangibleAssetsNetIncludingGoodwill | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 6.3 | 6.7 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 179 | 189 | 197 | 206 | 220 | 226 | 223 | 222 | 192 | 193 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.4 | 1.4 | 1.5 | 1.7 | 1.3 | 1.3 | 1.3 | 1.2 | 2.9 | 2.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 5.0 | 6.0 | 6.0 | 8.0 |
| Percentage of OperatingLeaseRightOfUseAsset | 2.8 | 3.2 | 3.0 | 3.6 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 2.3 | 2.5 | 2.6 | 3.5 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 6.0 | 7.0 | 8.0 |
| Percentage of OperatingLeaseRightOfUseAsset | 2.9 | 3.2 | 3.6 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 2.5 | 2.6 | 3.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1273 | 1222 | 1058 | 660 | 605 | 591 | 613 | 598 | 195 | 194 | 184 | 188 | 218 | 229 | 241 | 223 | 246 | 223 | 220 | 224 | 212 | 212 | 175 | 189 | 192 | 204 | 208 | 222 | 208 | 205 | 208 | 229 | 188 | 195 | 189 | 174 | 170 | 129 | 123 | 117 | 116 | 108 |
| Percentage of OtherAssetsNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 10.0 | 9.3 | 7.9 | 5.3 | 3.6 | 3.4 | 3.5 | 3.4 | 3.0 | 2.9 | 2.8 | 2.8 | 3.3 | 3.4 | 3.6 | 3.3 | 3.9 | 3.5 | 3.7 | 3.8 | 3.7 | 3.7 | 3.2 | 3.5 | 3.6 | 3.8 | 3.8 | 4.2 | 5.0 | 5.0 | 5.0 | 6.3 | 5.6 | 7.2 | 7.0 | 7.8 | 7.9 | 7.3 | 7.9 | 7.5 | 7.8 | 7.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 1.0 | 3.0 |
| Percentage of OtherAssetsNoncurrent | 0.1 | 0.5 |
| Percentage of Assets | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 0.4 | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 550 | 88 | 68 | 18 | 18 | 12 |
| Percentage of EquitySecuritiesFvNi | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.3 | 0.7 | 0.5 | 0.3 | 0.3 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 68 | 2.0 |
| Percentage of EquitySecuritiesFvNi | 100.0 | 0.0 |
| Percentage of Assets | 0.5 | 0.0 |
| Percentage of Assets us-gaap:OtherInvestments us-gaap:FairValueInputsLevel1 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 4.0 | 88 | 68 | 2.0 |
| Percentage of EquitySecuritiesFvNi | 0.7 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.7 | 0.5 | 0.0 |
| Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:CarryingReportedAmountFairValueDisclosure | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 4.0 | 88 | 68 | 2.0 |
| Percentage of EquitySecuritiesFvNi | 0.7 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 0.0 | 0.7 | 0.5 | 0.0 |
| Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:EstimateOfFairValueFairValueDisclosure | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 |
| Value | 162 |
| Percentage of EquitySecuritiesFvNi | 29.5 |
| Percentage of Assets | 1.3 |
| Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:CarryingReportedAmountFairValueDisclosure | 0.0 |
| Period End | 2021-06-30 |
| Value | 162 |
| Percentage of EquitySecuritiesFvNi | 29.5 |
| Percentage of Assets | 1.3 |
| Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:EstimateOfFairValueFairValueDisclosure | 0.0 |
| Period End | 2021-06-30 | 2020-12-31 |
| Value | 384 | 332 |
| Percentage of EquitySecuritiesFvNi | 69.8 | 488.2 |
| Percentage of Assets | 3.0 | 2.5 |
| Percentage of Assets us-gaap:FairValueInputsLevel3 us-gaap:CarryingReportedAmountFairValueDisclosure | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2020-12-31 |
| Value | 384 | 332 |
| Percentage of EquitySecuritiesFvNi | 69.8 | 488.2 |
| Percentage of Assets | 3.0 | 2.5 |
| Percentage of Assets us-gaap:FairValueInputsLevel3 us-gaap:EstimateOfFairValueFairValueDisclosure | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 1000000.0 | 1000000.0 | 3000000.0 |
| Percentage of OtherAssets | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 0.4 | 0.4 | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 588 | 469 | 533 | 466 | 573 | 526 | 782 | 630 | 424 | 376 | 413 | 428 | 455 | 356 | 370 | 290 | 290 | 245 | 322 | 291 | 271 | 261 | 251 | 272 | 236 | 245 | 258 | 282 | 197 | 233 | 196 | 215 | 138 | 176 | 153 | 153 | 122 | 88 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.6 | 3.6 | 4.0 | 3.7 | 3.4 | 3.0 | 4.5 | 3.5 | 6.5 | 5.7 | 6.3 | 6.5 | 6.9 | 5.4 | 5.5 | 4.3 | 4.6 | 3.9 | 5.4 | 5.0 | 4.7 | 4.6 | 4.6 | 5.0 | 4.4 | 4.5 | 4.7 | 5.3 | 4.7 | 5.7 | 4.7 | 5.9 | 4.1 | 6.4 | 5.6 | 6.8 | 5.7 | 5.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 278 | 206 | 247 | 262 | 277 | 256 | 286 | 233 | 269 | 255 | 273 | 287 | 260 | 261 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | 47.3 | 43.9 | 46.3 | 56.2 | 48.3 | 48.7 | 36.6 | 37.0 | 63.4 | 67.8 | 66.2 | 67.1 | 57.3 | 70.5 |
| Percentage of Assets | 2.2 | 1.6 | 1.8 | 2.1 | 1.7 | 1.5 | 1.6 | 1.3 | 4.1 | 3.8 | 4.2 | 4.3 | 4.0 | 3.9 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 5.3 | 3.9 | 4.6 | 4.8 | 5.3 | 4.8 | 5.3 | 4.3 | 5.1 | 4.8 | 5.2 | 5.4 | 5.0 | 4.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 302 | 176 | 284 | 210 | 261 | 197 | 296 | 214 | 76 | 77 | 85 | 97 | 85 | 36 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | 51.4 | 37.5 | 53.3 | 45.1 | 45.5 | 37.5 | 37.9 | 34.0 | 18.0 | 20.7 | 20.8 | 22.7 | 18.7 | 9.7 |
| Percentage of Assets | 2.4 | 1.3 | 2.1 | 1.7 | 1.6 | 1.1 | 1.7 | 1.2 | 1.2 | 1.2 | 1.3 | 1.5 | 1.3 | 0.5 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 4.1 | 2.3 | 3.6 | 2.9 | 2.3 | 1.8 | 2.5 | 1.7 | 17.4 | 15.4 | 16.9 | 19.2 | 17.8 | 7.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 24 | 22 | 19 | 15 | 31 | 28 | 142 | 136 | 15 | 0.099 | 0.1 | 0.099 | 0.088 | 1.1 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | 4.1 | 4.7 | 3.6 | 3.2 | 5.4 | 5.3 | 18.2 | 21.6 | 3.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 |
| Percentage of Assets | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.8 | 0.8 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 4.3 | 3.1 | 3.3 | 3.5 | 1.3 | 1.3 | 6.0 | 5.8 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 70 | 138 | 70 | 61 | 99 | 98 | 109 | 73 | 90 | 67 | 78 | 73 | 137 | 84 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | 11.9 | 29.4 | 13.1 | 13.1 | 17.3 | 18.6 | 13.9 | 11.6 | 21.3 | 17.9 | 19.1 | 17.2 | 30.1 | 22.8 |
| Percentage of Assets | 0.5 | 1.1 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.4 | 1.4 | 1.0 | 1.2 | 1.1 | 2.1 | 1.2 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 1.2 | 2.4 | 1.2 | 1.1 | 1.8 | 1.6 | 1.9 | 1.3 | 1.7 | 1.2 | 1.4 | 1.3 | 2.5 | 1.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -86.0 | -73.0 | -87.0 | -82.0 | -95.0 | -53.0 | -51.0 | -26.0 | -26.809 | -23.958 | -25.006 | -29.993 | -27.517 | -12.318 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrent | -14.6 | -15.6 | -16.3 | -17.6 | -16.6 | -10.1 | -6.5 | -4.1 | -6.3 | -6.4 | -6.1 | -7.0 | -6.0 | -3.3 |
| Percentage of Assets | -0.7 | -0.6 | -0.7 | -0.7 | -0.6 | -0.3 | -0.3 | -0.1 | -0.4 | -0.4 | -0.4 | -0.5 | -0.4 | -0.2 |
| Percentage of Assets srt:ConsolidationEliminations | 1.4 | 1.1 | 1.4 | 1.3 | 1.3 | 0.7 | 0.7 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.4 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 533 | 782 | 413 | 370 | 322 | 251 | 265 | 218 | 237 | 246 | 263 | 187 | 225 | 182 | 200 | 128 | 167 | 143 | 147 | 115 | 101 | 79 | 88 | 70 | 64 |
| Percentage of AccruedLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.0 | 4.5 | 6.3 | 5.5 | 5.4 | 4.6 | 4.8 | 4.1 | 4.4 | 4.5 | 5.0 | 4.5 | 5.5 | 4.4 | 5.5 | 3.9 | 6.1 | 5.3 | 6.6 | 5.3 | 5.7 | 5.1 | 5.6 | 4.7 | 4.4 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 75 | 38 | 45 | 54 | 61 | 67 | 75 | 83 | 49 | 31 |
| Percentage of ContractWithCustomerLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.6 | 0.2 | 0.3 | 0.3 | 0.3 | 1.0 | 1.1 | 1.3 | 0.7 | 0.5 |
| Period End | 2021-03-31 |
| Value | 183 |
| Percentage of ContractWithCustomerLiabilityCurrent | 0.0 |
| Percentage of Assets | 1.4 |
| Percentage of Assets sbgi:DistributionRevenueRebate | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
| Value | 66 | 58 | 58 | 72 | 71 | 71 | 71 | 71 | 25 | 42 | 42 | 43 | 44 | 154 | 161 |
| Percentage of DebtCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.5 | 0.4 | 0.4 | 0.6 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.6 | 0.6 | 0.7 | 0.7 | 2.3 | 2.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.0 | 4.0 | 4.247 | 4.179 | 4.1 | 3.94 | 4.254 | 3.445 |
| Percentage of DebtCurrent | 7.6 | 8.6 | 8.6 | 6.9 | 7.0 | 7.0 | 5.6 | 5.6 | 16.8 | 9.9 | 9.6 | 9.0 | 9.6 | 2.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 42 | 41 | 41 | 41 | 41 | 40 | 41 | 41 | 7.838 | 7.572 | 7.842 | 8.99 | 9.291 | 9.645 |
| Percentage of DebtCurrent | 63.6 | 70.7 | 70.7 | 56.9 | 57.7 | 56.3 | 57.7 | 57.7 | 31.1 | 17.9 | 18.4 | 20.6 | 21.0 | 6.0 |
| Percentage of Assets | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 0.6 | 0.5 | 0.5 | 0.6 | 0.4 | 0.4 | 0.4 | 0.3 | 1.8 | 1.5 | 1.5 | 1.8 | 1.9 | 1.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 20 | 13 | 13 | 27 | 27 | 27 | 27 | 27 | 13 | 31 | 31 | 31 | 31 | 148 |
| Percentage of DebtCurrent | 30.3 | 22.4 | 22.4 | 37.5 | 38.0 | 38.0 | 38.0 | 38.0 | 54.3 | 73.8 | 73.1 | 71.3 | 70.5 | 92.2 |
| Percentage of Assets | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.5 | 0.5 | 0.5 | 0.5 | 2.2 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 0.3 | 0.2 | 0.2 | 0.5 | 0.5 | 0.4 | 0.5 | 0.5 | 0.3 | 0.6 | 0.6 | 0.6 | 0.6 | 2.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -1.0 | -1.0 | -1.0 | -1.0 | -2.0 | -1.0 | -1.0 | -1.0 | -0.578 | -0.693 | -0.513 | -0.367 | -0.489 | -0.546 |
| Percentage of DebtCurrent | -1.5 | -1.7 | -1.7 | -1.4 | -2.8 | -1.4 | -1.4 | -1.4 | -2.3 | -1.6 | -1.2 | -0.8 | -1.1 | -0.3 |
| Percentage of Assets | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 |
| Percentage of Assets srt:ConsolidationEliminations | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.1 | 1.9 | 1.9 | 1.9 | 2.0 | 1.7 |
| Percentage of DebtCurrent | 3.0 | 3.4 | 3.4 | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | 8.3 | 4.5 | 4.5 | 4.3 | 4.5 | 1.1 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:AffiliatedEntity | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1036 | 922 | 1034 | 974 | 903 | 840 | 1134 | 1093 | 526 | 539 | 572 | 600 | 568 | 591 | 726 | 911 | 537 | 467 | 636 | 599 | 531 | 537 | 535 | 491 | 396 | 431 | 494 | 463 | 336 | 397 | 343 | 340 | 226 | 311 | 307 | 303 | 231 | 218 | 195 | 199 | 177 | 188 |
| Percentage of LiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 8.1 | 7.0 | 7.7 | 7.8 | 5.4 | 4.8 | 6.5 | 6.1 | 8.0 | 8.1 | 8.7 | 9.1 | 8.6 | 8.9 | 10.7 | 13.6 | 8.5 | 7.4 | 10.7 | 10.2 | 9.2 | 9.4 | 9.8 | 9.0 | 7.4 | 8.0 | 9.1 | 8.7 | 8.1 | 9.7 | 8.3 | 9.4 | 6.8 | 11.4 | 11.3 | 13.5 | 10.7 | 12.3 | 12.4 | 12.8 | 11.9 | 12.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 388 | 332 | 386 | 459 | 381 | 378 | 423 | 384 | 341 | 370 | 384 | 408 | 326 | 445 |
| Percentage of LiabilitiesCurrent | 37.5 | 36.0 | 37.3 | 47.1 | 42.2 | 45.0 | 37.3 | 35.1 | 64.9 | 68.6 | 67.2 | 68.0 | 57.5 | 61.3 |
| Percentage of Assets | 3.0 | 2.5 | 2.9 | 3.7 | 2.3 | 2.2 | 2.4 | 2.2 | 5.2 | 5.6 | 5.9 | 6.2 | 5.0 | 6.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 7.4 | 6.2 | 7.1 | 8.4 | 7.2 | 7.0 | 7.8 | 7.1 | 6.4 | 6.9 | 7.3 | 7.7 | 6.2 | 7.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 619 | 489 | 631 | 493 | 461 | 361 | 484 | 495 | 91 | 93 | 103 | 117 | 101 | 59 |
| Percentage of LiabilitiesCurrent | 59.7 | 53.0 | 61.0 | 50.6 | 51.1 | 43.0 | 42.7 | 45.3 | 17.3 | 17.4 | 18.1 | 19.6 | 17.8 | 8.3 |
| Percentage of Assets | 4.8 | 3.7 | 4.7 | 3.9 | 2.7 | 2.1 | 2.8 | 2.8 | 1.4 | 1.4 | 1.6 | 1.8 | 1.5 | 0.9 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 8.4 | 6.4 | 7.9 | 6.8 | 4.1 | 3.2 | 4.1 | 4.0 | 20.7 | 18.5 | 20.4 | 23.3 | 21.1 | 11.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 25 | 23 | 20 | 16 | 32 | 29 | 142 | 137 | 16 | 1.127 | 0.1 | 0.099 | 0.088 | 1.1 |
| Percentage of LiabilitiesCurrent | 2.4 | 2.5 | 1.9 | 1.6 | 3.5 | 3.5 | 12.5 | 12.5 | 3.1 | 0.2 | 0.0 | 0.0 | 0.0 | 0.2 |
| Percentage of Assets | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.2 | 0.8 | 0.8 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 4.4 | 3.2 | 3.5 | 3.8 | 1.4 | 1.3 | 6.0 | 5.8 | 1.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 91 | 152 | 85 | 89 | 126 | 126 | 137 | 104 | 104 | 99 | 109 | 104 | 168 | 232 |
| Percentage of LiabilitiesCurrent | 8.8 | 16.5 | 8.2 | 9.1 | 14.0 | 15.0 | 12.1 | 9.5 | 19.9 | 18.4 | 19.2 | 17.5 | 29.6 | 32.1 |
| Percentage of Assets | 0.7 | 1.2 | 0.6 | 0.7 | 0.8 | 0.7 | 0.8 | 0.6 | 1.6 | 1.5 | 1.7 | 1.6 | 2.6 | 3.4 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 1.6 | 2.6 | 1.5 | 1.6 | 2.3 | 2.1 | 2.4 | 1.9 | 1.9 | 1.8 | 2.0 | 1.9 | 3.0 | 4.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -87.0 | -74.0 | -88.0 | -83.0 | -97.0 | -54.0 | -52.0 | -27.0 | -27.387 | -24.651 | -25.519 | -30.359 | -28.007 | -12.864 |
| Percentage of LiabilitiesCurrent | -8.4 | -8.0 | -8.5 | -8.5 | -10.7 | -6.4 | -4.6 | -2.5 | -5.2 | -4.6 | -4.5 | -5.1 | -4.9 | -1.8 |
| Percentage of Assets | -0.7 | -0.6 | -0.7 | -0.7 | -0.6 | -0.3 | -0.3 | -0.2 | -0.4 | -0.4 | -0.4 | -0.5 | -0.4 | -0.2 |
| Percentage of Assets srt:ConsolidationEliminations | 1.4 | 1.1 | 1.4 | 1.3 | 1.3 | 0.7 | 0.7 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.4 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 410 | 118 |
| Percentage of LiabilitiesCurrent | 39.7 | 10.4 |
| Percentage of Assets | 3.1 | 0.7 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 56 | 69 | 41 |
| Percentage of LongTermDebtCurrent | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.4 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 26 | 30 | 34 | 38 | 41 | 41 | 38 | 38 | 22 | 22 |
| Percentage of OperatingLeaseLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.2 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 90 | 115 | 107 | 101 | 99 | 73 | 58 | 92 | 78 | 37 |
| Percentage of OtherAccruedLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.7 | 0.7 | 1.6 | 1.5 | 1.7 | 1.4 | 1.1 | 2.2 | 2.9 | 2.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 293 | 288 | 317 | 287 | 169 | 133 | 155 | 247 | 76 | 121 | 116 | 128 | 68 | 79 | 194 | 142 | 76 | 154 | 139 | 139 | 81 | 104 | 116 | 149 | 95 | 124 | 117 | 134 | 80 | 99 | 98 | 106 | 66 | 84 | 102 | 101 | 63 | 65 |
| Percentage of OtherLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.3 | 2.2 | 2.4 | 2.3 | 1.0 | 0.8 | 0.9 | 1.4 | 1.2 | 1.8 | 1.8 | 1.9 | 1.0 | 1.2 | 2.9 | 2.1 | 1.2 | 2.4 | 2.3 | 2.4 | 1.4 | 1.8 | 2.1 | 2.7 | 1.8 | 2.3 | 2.2 | 2.5 | 1.9 | 2.4 | 2.4 | 2.9 | 2.0 | 3.1 | 3.7 | 4.5 | 3.0 | 4.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 51 | 45 | 40 | 19 |
| Percentage of OtherLiabilitiesCurrent | 17.4 | 15.6 | 12.6 | 12.3 |
| Percentage of Assets | 0.4 | 0.3 | 0.3 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 23.3 | 18.7 | 17.2 | 8.3 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 35 | 21 | 19 |
| Percentage of OtherLiabilitiesCurrent | 12.2 | 12.4 | 12.3 |
| Percentage of Assets | 0.3 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 14.8 | 7.8 | 8.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 2327 | 2313 |
| Percentage of LiabilitiesNoncurrent | 100.0 | 100.0 |
| Percentage of Assets | 17.4 | 13.3 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2015-09-30 | 2015-06-30 |
| Value | 12513 | 4030 | 4055 | 4068 | 4084 | 4206 | 4178 | 3891 | 3889 |
| Percentage of LongTermDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 93.5 | 60.5 | 60.6 | 64.7 | 64.6 | 71.7 | 72.3 | 71.0 | 72.3 |
| Period End | 2021-06-30 |
| Value | 735 |
| Percentage of LongTermDebt | 0.0 |
| Percentage of Assets | 5.8 |
| Percentage of Assets sbgi:STGTermLoanFacility sbgi:STGTermLoanB3 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 12539 | 12540 | 12551 | 12463 | 12399 | 13302 | 12438 | 12463 | 3788 | 3883 | 3892 | 3902 | 3875 | 3913 | 3018 | 2277 | 1204 |
| Percentage of DebtAndCapitalLeaseObligations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 98.1 | 95.5 | 93.8 | 99.8 | 73.9 | 76.6 | 71.6 | 70.1 | 57.8 | 58.5 | 59.2 | 58.9 | 71.3 | 71.8 | 72.8 | 83.4 | 76.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 |
| Value | 4395 | 4401 | 4405 | 4415 | 4422 | 5079 | 4433 | 4447 | 3769 | 3864 | 3843 | 3881 |
| Percentage of DebtAndCapitalLeaseObligations | 35.1 | 35.1 | 35.1 | 35.4 | 35.7 | 38.2 | 35.6 | 35.7 | 99.5 | 99.5 | 98.7 | 99.5 |
| Percentage of Assets | 34.4 | 33.5 | 32.9 | 35.4 | 26.4 | 29.3 | 25.5 | 25.0 | 57.5 | 58.3 | 58.5 | 58.6 |
| Percentage of Assets srt:SubsidiaryIssuer | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 14 | 15 | 16 | 20 |
| Percentage of DebtAndCapitalLeaseObligations | 0.1 | 0.1 | 0.1 | 0.2 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 6.4 | 6.2 | 6.9 | 8.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 7.0 | 8.0 | 8.0 |
| Percentage of DebtAndCapitalLeaseObligations | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary sbgi:CunninghamBroadcastingCorporation srt:AffiliatedEntity | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 |
| Value | 8.0 | 9.0 |
| Percentage of DebtAndCapitalLeaseObligations | 0.1 | 0.1 |
| Percentage of Assets | 0.1 | 0.1 |
| Percentage of Assets sbgi:CunninghamBroadcastingCorporation us-gaap:VariableInterestEntityPrimaryBeneficiary srt:AffiliatedEntity | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 17 | 18 | 20 |
| Percentage of DebtAndCapitalLeaseObligations | 0.1 | 0.1 | 0.2 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 7.2 | 6.7 | 8.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 12473 | 12482 | 12493 | 12391 | 12328 | 13231 | 12669 | 12392 | 3762 | 3840 | 3849 | 3858 | 3864 | 3875 | 3875 | 3876 | 3884 | 4002 | 4014 | 4022 | 3984 | 3998 | 3669 | 3804 | 3808 | 3831 | 3796 | 3725 | 3038 | 2954 | 2966 | 2436 | 2407 | 2201 | 2210 | 1664 | 1667 | 1312 | 1148 | 1156 | 1141 | 1148 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 97.6 | 95.1 | 93.4 | 99.3 | 73.5 | 76.2 | 72.9 | 69.7 | 57.4 | 57.9 | 58.6 | 58.2 | 58.7 | 58.2 | 57.1 | 58.0 | 61.8 | 63.4 | 67.3 | 68.6 | 68.9 | 69.6 | 67.5 | 69.4 | 70.8 | 70.7 | 69.6 | 70.4 | 72.7 | 71.9 | 71.5 | 67.3 | 72.0 | 80.5 | 81.0 | 74.1 | 77.2 | 74.1 | 73.1 | 74.0 | 76.2 | 77.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 8.0 | 9.0 | 10.0 | 15 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 3.7 | 3.7 | 4.3 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 31 | 32 | 33 | 35 | 36 | 37 | 32 | 33 | 34 | 35 | 36 | 37 | 35 | 39 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.9 | 0.9 | 0.9 | 1.0 | 0.9 | 1.0 |
| Percentage of Assets | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.5 | 0.5 | 0.6 | 0.6 | 0.5 | 0.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 8443 | 8448 | 8460 | 8363 | 8291 | 8529 | 8317 | 8333 | 365 | 383 | 381 | 379 | 381 | 381 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 67.7 | 67.7 | 67.7 | 67.5 | 67.3 | 64.5 | 65.6 | 67.2 | 9.7 | 10.0 | 9.9 | 9.8 | 9.9 | 9.8 |
| Percentage of Assets | 66.1 | 64.3 | 63.2 | 67.0 | 49.4 | 49.1 | 47.9 | 46.9 | 5.6 | 5.8 | 5.8 | 5.7 | 5.8 | 5.6 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 114.0 | 109.8 | 106.0 | 115.8 | 73.3 | 76.3 | 71.2 | 68.0 | 82.9 | 75.9 | 75.2 | 75.2 | 79.8 | 75.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.3 | 5.5 | 5.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 5.5 | 5.3 | 5.2 | 5.6 | 4.2 | 4.0 | 4.0 | 3.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 124.1 | 98.2 | 121.3 | 164.7 | 29.7 | 31.8 | 29.7 | 29.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 4324 | 4335 | 4337 | 4331 | 4336 | 4991 | 4348 | 4360 | 3693 | 3769 | 3775 | 3781 | 3787 | 3799 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 34.7 | 34.7 | 34.7 | 35.0 | 35.2 | 37.7 | 34.3 | 35.2 | 98.2 | 98.1 | 98.1 | 98.0 | 98.0 | 98.1 |
| Percentage of Assets | 33.8 | 33.0 | 32.4 | 34.7 | 25.9 | 28.7 | 25.0 | 24.5 | 56.4 | 56.8 | 57.4 | 57.1 | 57.5 | 56.0 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 74.8 | 74.4 | 74.7 | 76.9 | 80.1 | 81.5 | 77.7 | 79.4 | 68.5 | 69.8 | 68.6 | 68.6 | 67.7 | 68.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -1025.0 | -1033.0 | -1037.0 | -1038.0 | -1035.0 | -1026.0 | -1030.0 | -1034.0 | -330.504 | -347.656 | -344.062 | -340.494 | -340.936 | -333.243 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | -8.2 | -8.3 | -8.3 | -8.4 | -8.4 | -7.8 | -8.1 | -8.3 | -8.8 | -9.1 | -8.9 | -8.8 | -8.8 | -8.6 |
| Percentage of Assets | -8.0 | -7.9 | -7.7 | -8.3 | -6.2 | -5.9 | -5.9 | -5.8 | -5.0 | -5.2 | -5.2 | -5.1 | -5.2 | -4.9 |
| Percentage of Assets srt:ConsolidationEliminations | 16.6 | 16.0 | 16.2 | 16.7 | 13.7 | 13.7 | 13.4 | 13.4 | 5.3 | 5.6 | 5.4 | 5.4 | 5.3 | 5.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 11 | 13 | 15 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.1 | 0.1 | 0.1 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 4.6 | 4.9 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 5.0 | 6.0 | 6.0 | 7.0 | 7.0 | 8.0 | 9.0 | 9.0 | 9.6 | 10 | 10 | 11 | 11 | 12 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets srt:AffiliatedEntity | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 72 | 93 | 89 | 60 | 202 | 197 | 192 | 180 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16 | 9.365 | 10 | 10 | 9.813 | 7.834 | 7.845 | 8.341 |
| Percentage of MinorityInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.6 | 0.7 | 0.7 | 0.5 | 1.2 | 1.1 | 1.1 | 1.0 | -0.6 | -0.6 | -0.6 | -0.6 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.4 | -0.5 | -0.4 | -0.4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.6 | 0.4 | 0.5 | 0.6 | 0.6 | 0.5 | 0.5 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 68 | 89 | 85 | 56 | 198 | 193 | 188 | 176 | -43.685 | -43.806 | -42.954 | -42.428 | -40.205 | -39.013 |
| Percentage of MinorityInterest | 94.4 | 95.7 | 95.5 | 93.3 | 98.0 | 98.0 | 97.9 | 97.8 | 108.9 | 108.8 | 111.5 | 111.7 | 112.5 | 113.5 |
| Percentage of Assets | 0.5 | 0.7 | 0.6 | 0.4 | 1.2 | 1.1 | 1.1 | 1.0 | -0.7 | -0.7 | -0.7 | -0.6 | -0.6 | -0.6 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 0.9 | 1.2 | 1.1 | 0.8 | 1.8 | 1.7 | 1.6 | 1.4 | -9.9 | -8.7 | -8.5 | -8.4 | -8.4 | -7.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.569 | 3.558 | 4.438 | 4.449 | 4.456 | 4.641 |
| Percentage of MinorityInterest | 5.6 | 4.3 | 4.5 | 6.7 | 2.0 | 2.0 | 2.1 | 2.2 | -8.9 | -8.8 | -11.5 | -11.7 | -12.5 | -13.5 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets srt:ConsolidationEliminations | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 417 | 506 | 622 | 364 | 520 | 431 | 434 | 640 | 84 | 80 | 85 | 78 | 77 | 77 | 79 | 70 | 86 | 82 | 76 | 71 | 72 | 71 | 68 | 72 | 78 | 78 | 77 | 73 | 68 | 66 | 67 | 63 | 47 | 53 | 48 | 50 | 47 | 46 | 47 | 46 | 46 | 45 |
| Percentage of OtherLiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.3 | 3.9 | 4.6 | 2.9 | 3.1 | 2.5 | 2.5 | 3.6 | 1.3 | 1.2 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.4 | 1.3 | 1.3 | 1.2 | 1.3 | 1.2 | 1.3 | 1.3 | 1.5 | 1.4 | 1.4 | 1.4 | 1.6 | 1.6 | 1.6 | 1.8 | 1.4 | 1.9 | 1.8 | 2.3 | 2.2 | 2.6 | 3.0 | 3.0 | 3.1 | 3.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 4.0 | 11 | 17 | 1.0 |
| Percentage of OtherLiabilitiesNoncurrent | 1.0 | 2.2 | 2.7 | 0.2 |
| Percentage of Assets | 0.0 | 0.1 | 0.1 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 1.8 | 4.6 | 7.3 | 0.4 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 14 | 5.0 | 1.0 |
| Percentage of OtherLiabilitiesNoncurrent | 3.8 | 1.0 | 0.2 |
| Percentage of Assets | 0.1 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 5.9 | 1.9 | 0.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 187 | 194 | 198 | 203 | 211 | 216 | 217 | 213 | 194 | 193 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.5 | 1.5 | 1.5 | 1.6 | 1.3 | 1.2 | 1.2 | 1.2 | 3.0 | 2.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 5.0 | 5.0 | 5.0 | 6.0 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 2.7 | 2.6 | 2.5 | 2.8 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 2.3 | 2.1 | 2.1 | 2.6 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 5.0 | 6.0 | 6.0 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 2.5 | 2.8 | 2.8 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary | 2.1 | 2.2 | 2.6 |
| Period End | 2020-12-31 |
| Value | 36 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 |
| Percentage of Assets | 0.3 |
| Period End | 2020-12-31 |
| Value | 32 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 |
| Percentage of Assets | 0.2 |
| Period End | 2020-12-31 |
| Value | 26 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 |
| Percentage of Assets | 0.2 |
| Period End | 2020-12-31 |
| Value | 24 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 |
| Percentage of Assets | 0.2 |
| Period End | 2020-12-31 |
| Value | 142 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 |
| Percentage of Assets | 1.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 232 | 255 | 251 | 216 | 216 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.7 | 1.5 | 1.4 | 3.3 | 3.3 |
| Period End | 2020-12-31 |
| Value | 306 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 |
| Percentage of Assets | 2.3 |
| Period End | 2020-12-31 |
| Value | 74 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 |
| Percentage of Assets | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | -1624.0 | -1279.0 | -1274.0 | -1737.0 | 1609 | 1459 | 1502 | 1495 | 1569 | 1559 | 1638 | 1623 | 1621 | 1607 | 1568 | 1141 | 1158 | 1129 | 587 | 516 | 570 | 547 | 525 | 476 | 469 | 437 | 427 | 374 | 362 | 332 | 396 | 408 | 378 | -104.728 | -116.95 | -61.749 | -76.587 | -97.818 | -121.175 | -133.192 | -143.152 | -165.423 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -12.7 | -9.7 | -9.5 | -13.9 | 9.6 | 8.4 | 8.6 | 8.4 | 23.9 | 23.5 | 24.9 | 24.5 | 24.6 | 24.1 | 23.1 | 17.1 | 18.4 | 17.9 | 9.9 | 8.8 | 9.9 | 9.5 | 9.7 | 8.7 | 8.7 | 8.1 | 7.8 | 7.1 | 8.7 | 8.1 | 9.6 | 11.3 | 11.3 | -3.8 | -4.3 | -2.7 | -3.5 | -5.5 | -7.7 | -8.5 | -9.6 | -11.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 3421 | 3517 | 3546 | 3512 | 3494 | 3594 | 3554 | 3601 | 3578 | 3608 | 3652 | 3708 | 3757 | 4114 |
| Percentage of StockholdersEquity | -210.7 | -275.0 | -278.3 | -202.2 | 217.2 | 246.3 | 236.6 | 240.9 | 228.0 | 231.4 | 222.9 | 228.4 | 231.8 | 262.3 |
| Percentage of Assets | 26.8 | 26.8 | 26.5 | 28.1 | 20.8 | 20.7 | 20.5 | 20.3 | 54.6 | 54.4 | 55.6 | 56.0 | 57.1 | 60.6 |
| Percentage of Assets srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 65.6 | 65.8 | 65.5 | 64.6 | 66.4 | 66.9 | 65.5 | 66.9 | 67.1 | 67.3 | 69.7 | 69.8 | 71.4 | 71.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -2406.0 | -2107.0 | -2098.0 | -2338.0 | 1220 | 1020 | 1069 | 1145 | -145.44 | -101.131 | -107.825 | -124.742 | -135.558 | -82.051 |
| Percentage of StockholdersEquity | 148.2 | 164.7 | 164.7 | 134.6 | 75.8 | 69.9 | 71.2 | 76.6 | -9.3 | -6.5 | -6.6 | -7.7 | -8.4 | -5.2 |
| Percentage of Assets | -18.8 | -16.0 | -15.7 | -18.7 | 7.3 | 5.9 | 6.2 | 6.4 | -2.2 | -1.5 | -1.6 | -1.9 | -2.1 | -1.2 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -32.5 | -27.4 | -26.3 | -32.4 | 10.8 | 9.1 | 9.2 | 9.3 | -33.0 | -20.0 | -21.2 | -24.7 | -28.3 | -16.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -1624.0 | -1278.0 | -1273.0 | -1737.0 | 1610 | 1460 | 1503 | 1495 | 1569 | 1559 | 1638 | 1623 | 1621 | 1568 |
| Percentage of StockholdersEquity | 100.0 | 99.9 | 99.9 | 100.0 | 100.1 | 100.1 | 100.1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -12.7 | -9.7 | -9.5 | -13.9 | 9.6 | 8.4 | 8.7 | 8.4 | 23.9 | 23.5 | 24.9 | 24.5 | 24.6 | 23.1 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | -287.9 | -179.2 | -220.6 | -408.7 | 68.4 | 66.3 | 63.7 | 63.8 | 98.2 | 99.1 | 100.0 | 100.0 | 99.8 | 99.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 1254 | 1226 | 1261 | 1092 | 895 | 956 | 1060 | 977 | 1550 | 1485 | 1579 | 1580 | 1594 | 1498 |
| Percentage of StockholdersEquity | -77.2 | -95.9 | -99.0 | -62.9 | 55.6 | 65.5 | 70.6 | 65.4 | 98.8 | 95.3 | 96.4 | 97.3 | 98.4 | 95.5 |
| Percentage of Assets | 9.8 | 9.3 | 9.4 | 8.7 | 5.3 | 5.5 | 6.1 | 5.5 | 23.7 | 22.4 | 24.0 | 23.8 | 24.2 | 22.1 |
| Percentage of Assets srt:SubsidiaryIssuer srt:ReportableLegalEntities | 21.7 | 21.0 | 21.7 | 19.4 | 16.5 | 15.6 | 18.9 | 17.8 | 28.7 | 27.5 | 28.7 | 28.7 | 28.5 | 26.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | -2269.0 | -2637.0 | -2710.0 | -2266.0 | -5610.0 | -5571.0 | -5684.0 | -5723.0 | -4982.865 | -4992.428 | -5124.122 | -5163.947 | -5216.388 | -5530.847 |
| Percentage of StockholdersEquity | 139.7 | 206.2 | 212.7 | 130.5 | -348.7 | -381.8 | -378.4 | -382.8 | -317.6 | -320.2 | -312.7 | -318.1 | -321.8 | -352.6 |
| Percentage of Assets | -17.8 | -20.1 | -20.3 | -18.2 | -33.5 | -32.1 | -32.7 | -32.2 | -76.0 | -75.3 | -78.0 | -77.9 | -79.3 | -81.5 |
| Percentage of Assets srt:ConsolidationEliminations | 36.7 | 40.9 | 42.4 | 36.4 | 74.1 | 74.2 | 73.9 | 74.3 | 80.2 | 80.5 | 81.0 | 81.6 | 81.8 | 83.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | -1552.0 | -1186.0 | -1185.0 | -1677.0 | 1811 | 1656 | 1694 | 1675 | 1528 | 1519 | 1600 | 1585 | 1585 | 1571 | 1534 | 1108 | 1124 | 1096 | 557 | 486 | 542 | 519 | 499 | 451 | 446 | 412 | 405 | 354 | 370 | 342 | 405 | 416 | 386 | -97.287 | -100.053 | -52.384 | -66.282 | -87.211 | -111.362 | -125.358 | -135.307 | -157.082 | -202.222 | -58.7 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -12.1 | -9.0 | -8.9 | -13.4 | 10.8 | 9.5 | 9.8 | 9.4 | 23.3 | 22.9 | 24.4 | 23.9 | 24.1 | 23.6 | 22.6 | 16.6 | 17.9 | 17.4 | 9.4 | 8.3 | 9.4 | 9.0 | 9.2 | 8.2 | 8.3 | 7.6 | 7.4 | 6.7 | 8.9 | 8.3 | 9.8 | 11.5 | 11.5 | -3.6 | -3.7 | -2.3 | -3.1 | -4.9 | -7.1 | -8.0 | -9.0 | -10.6 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.67 | 0.662 | 0.689 | 0.75 | 0.766 | 0.765 | 0.761 | 0.76 | 0.77 | 0.769 | 0.646 | 0.655 | 0.687 | 0.691 | 0.688 | 0.688 | 0.695 | 0.695 | 0.696 | 0.705 | 0.714 | 0.713 | 0.741 | 0.739 | 0.735 | 0.529 | 0.523 | 0.523 | 0.523 | 0.522 | 0.52 | 0.52 | 0.52 | 0.503 | 0.474 | 0.465 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -0.1 | -0.1 | -0.1 | -0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | -0.5 | -0.5 | -1.0 | -0.8 | -0.6 | -0.5 | -0.4 | -0.4 | -0.3 | -0.2 | -0.8 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | -5.0 | -2.0 | -10.0 | -11.0 | -11.0 | -2.0 | -2.0 | -1.0 | -0.784 | -0.784 | -0.784 | -1.423 | -1.423 | -1.423 | -1.423 | -0.807 | -0.807 | -0.807 | -0.807 | -0.834 | -0.834 | -0.834 | -0.834 | -6.277 | -6.287 | -6.371 | -6.455 | -2.693 | -1.869 | -2.514 | -2.553 | -5.109 | -5.071 | -5.032 | -4.993 | -4.602 | -4.659 | -4.744 | -4.848 | -3.792 | -3.833 | -3.914 | -4.213 | -3.495 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 0.3 | 0.2 | 0.8 | 0.7 | -0.6 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.0 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.2 | -1.4 | -1.4 | -1.5 | -1.6 | -0.8 | -0.5 | -0.7 | -0.6 | -1.2 | -1.3 | 5.2 | 5.0 | 8.8 | 7.0 | 5.4 | 4.4 | 3.0 | 2.8 | 2.5 | 2.1 | 6.0 |
| Percentage of Assets | -0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.0 | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.2 | -0.2 | -0.3 | -0.3 | -0.2 | -0.3 | -0.3 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 740 | 735 | 721 | 711 | 787 | 864 | 1011 | 1028 | 1024 | 1038 | 1121 | 1293 | 1336 | 1332 | 1320 | 1318 | 1346 | 1343 | 843 | 876 | 964 | 973 | 962 | 961 | 981 | 979 | 979 | 1001 | 1021 | 1018 | 1094 | 1097 | 1088 | 608 | 600 | 622 | 621 | 620 | 617 | 617 | 617 | 609 | 605 | 605 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -47.7 | -62.0 | -60.8 | -42.4 | 43.5 | 52.2 | 59.7 | 61.4 | 67.0 | 68.3 | 70.1 | 81.6 | 84.3 | 84.8 | 86.0 | 118.9 | 119.7 | 122.5 | 151.2 | 180.2 | 177.7 | 187.3 | 192.7 | 213.1 | 220.0 | 237.6 | 241.6 | 282.7 | 275.9 | 297.6 | 269.9 | 263.6 | 282.0 | -625.2 | -600.6 | -1187.6 | -937.7 | -711.9 | -554.4 | -492.7 | -456.1 | -388.1 | -299.3 | -1032.1 |
| Percentage of Assets | 5.8 | 5.6 | 5.4 | 5.7 | 4.7 | 5.0 | 5.8 | 5.8 | 15.6 | 15.7 | 17.1 | 19.5 | 20.3 | 20.0 | 19.5 | 19.7 | 21.4 | 21.3 | 14.1 | 14.9 | 16.7 | 16.9 | 17.7 | 17.5 | 18.2 | 18.1 | 18.0 | 18.9 | 24.4 | 24.8 | 26.4 | 30.3 | 32.6 | 22.2 | 22.0 | 27.7 | 28.8 | 35.1 | 39.3 | 39.5 | 41.2 | 41.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 72 | 93 | 89 | 60 | 202 | 197 | 192 | 180 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16 | 9.365 | 10 | 10 | 9.813 | 7.834 | 7.845 | 8.341 | 9.728 | 16 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -4.6 | -7.8 | -7.5 | -3.6 | 11.2 | 11.9 | 11.3 | 10.7 | -2.6 | -2.6 | -2.4 | -2.4 | -2.3 | -2.3 | -2.2 | -3.0 | -3.0 | -2.9 | -5.4 | -6.1 | -5.1 | -5.2 | -5.2 | -5.7 | -5.1 | -6.0 | -5.6 | -5.7 | 2.0 | 2.8 | 2.3 | 1.9 | 1.9 | -7.6 | -16.9 | -17.9 | -15.5 | -12.2 | -8.8 | -6.2 | -5.8 | -5.3 | -4.8 | -27.8 |
| Percentage of Assets | 0.6 | 0.7 | 0.7 | 0.5 | 1.2 | 1.1 | 1.1 | 1.0 | -0.6 | -0.6 | -0.6 | -0.6 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.4 | -0.5 | -0.4 | -0.4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.6 | 0.4 | 0.5 | 0.6 | 0.6 | 0.5 | 0.5 | 0.6 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | -2360.0 | -2013.0 | -1986.0 | -2438.0 | 832 | 596 | 492 | 467 | 544 | 520 | 517 | 330 | 285 | 275 | 248 | -176.37 | -188.701 | -214.859 | -255.804 | -360.459 | -394.418 | -426.731 | -437.029 | -479.6 | -507.215 | -537.253 | -545.82 | -625.484 | -657.787 | -684.534 | -696.996 | -684.47 | -705.846 | -708.748 | -713.697 | -680.092 | -694.296 | -714.74 | -734.511 | -747.793 | -757.319 | -771.953 | -813.876 | -678.182 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 152.1 | 169.7 | 167.6 | 145.4 | 45.9 | 36.0 | 29.0 | 27.9 | 35.6 | 34.3 | 32.3 | 20.9 | 18.0 | 17.5 | 16.2 | -15.9 | -16.8 | -19.6 | -45.8 | -74.1 | -72.7 | -82.1 | -87.5 | -106.3 | -113.7 | -130.3 | -134.7 | -176.5 | -177.7 | -199.9 | -171.8 | -164.4 | -182.9 | 728.5 | 713.3 | 1298.3 | 1047.5 | 819.6 | 659.6 | 596.5 | 559.7 | 491.4 | 402.5 | 1155.3 |
| Percentage of Assets | -18.5 | -15.3 | -14.8 | -19.5 | 5.0 | 3.4 | 2.8 | 2.6 | 8.3 | 7.9 | 7.9 | 5.0 | 4.3 | 4.1 | 3.7 | -2.6 | -3.0 | -3.4 | -4.3 | -6.1 | -6.8 | -7.4 | -8.0 | -8.8 | -9.4 | -9.9 | -10.0 | -11.8 | -15.7 | -16.7 | -16.8 | -18.9 | -21.1 | -25.9 | -26.1 | -30.3 | -32.1 | -40.4 | -46.7 | -47.8 | -50.6 | -52.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 670000.0 | 662000.0 | 689000.0 | 750000.0 | 766000.0 | 765000.0 | 761000.0 | 760000.0 | 770000.0 | 769000.0 | 646000.0 | 655000.0 | 687000.0 | 691000.0 | 688000.0 | 688000.0 | 695000.0 | 695000.0 | 696000.0 | 705000.0 | 714000.0 | 713000.0 | 741000.0 | 739000.0 | 735000.0 | 529000.0 | 523000.0 | 523000.0 | 523000.0 | 522000.0 | 520000.0 | 520000.0 | 520000.0 | 503000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:CommonClassA | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 740 | 735 | 721 | 711 | 787 | 864 | 1011 | 1028 | 1024 | 1038 | 1121 | 1293 | 1336 | 1332 | 1320 | 1318 | 1346 | 1343 | 843 | 876 | 964 | 973 | 962 | 961 | 981 | 979 | 979 | 1001 | 1021 | 1018 | 1094 | 1097 | 1088 | 608 | 600 | 622 | 621 | 620 | 617 | 617 | 617 | 609 |
| Percentage of AdditionalPaidInCapitalCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 5.8 | 5.6 | 5.4 | 5.7 | 4.7 | 5.0 | 5.8 | 5.8 | 15.6 | 15.7 | 17.1 | 19.5 | 20.3 | 20.0 | 19.5 | 19.7 | 21.4 | 21.3 | 14.1 | 14.9 | 16.7 | 16.9 | 17.7 | 17.5 | 18.2 | 18.1 | 18.0 | 18.9 | 24.4 | 24.8 | 26.4 | 30.3 | 32.6 | 22.2 | 22.0 | 27.7 | 28.8 | 35.1 | 39.3 | 39.5 | 41.2 | 41.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | -2360.0 | -2013.0 | -1986.0 | -2438.0 | 832 | 596 | 492 | 467 | 544 | 520 | 517 | 330 | 285 | 275 | 248 | -176.37 | -188.701 | -214.859 | -255.804 | -360.459 | -394.418 | -426.731 | -437.029 | -479.6 | -507.215 | -537.253 | -545.82 | -625.484 | -657.787 | -684.534 | -696.996 | -684.47 | -705.846 | -708.748 | -713.697 | -680.092 | -694.296 | -714.74 | -734.511 | -747.793 | -757.319 | -771.953 |
| Percentage of RetainedEarningsAccumulatedDeficit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -18.5 | -15.3 | -14.8 | -19.5 | 5.0 | 3.4 | 2.8 | 2.6 | 8.3 | 7.9 | 7.9 | 5.0 | 4.3 | 4.1 | 3.7 | -2.6 | -3.0 | -3.4 | -4.3 | -6.1 | -6.8 | -7.4 | -8.0 | -8.8 | -9.4 | -9.9 | -10.0 | -11.8 | -15.7 | -16.7 | -16.8 | -18.9 | -21.1 | -25.9 | -26.1 | -30.3 | -32.1 | -40.4 | -46.7 | -47.8 | -50.6 | -52.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | -5000000.0 | -2000000.0 | -10000000.0 | -11000000.0 | -11000000.0 | -2000000.0 | -2000000.0 | -1000000.0 | -784000.0 | -784000.0 | -784000.0 | -1423000.0 | -1423000.0 | -1423000.0 | -1423000.0 | -807000.0 | -807000.0 | -807000.0 | -807000.0 | -834000.0 | -834000.0 | -834000.0 | -834000.0 | -6277000.0 | -6287000.0 | -6371000.0 | -6455000.0 | -2693000.0 | -1869000.0 | -2514000.0 | -2553000.0 | -5109000.0 | -5071000.0 | -5032000.0 | -4993000.0 | -4602000.0 | -4659000.0 | -4744000.0 | -4848000.0 | -3792000.0 | -3833000.0 | -3914000.0 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.0 | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.2 | -0.2 | -0.3 | -0.3 | -0.2 | -0.3 | -0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 72 | 93 | 89 | 60 | 202 | 197 | 192 | 180 | -40.116 | -40.248 | -38.516 | -37.979 | -35.749 | -36.164 | -34.372 | -33.696 | -33.204 | -32.254 | -30.047 | -29.85 | -27.618 | -27.15 | -26.132 | -25.518 | -22.8 | -24.804 | -22.539 | -20.292 | 7.395 | 9.573 | 9.334 | 7.717 | 7.289 | 7.441 | 16 | 9.365 | 10 | 10 | 9.813 | 7.834 | 7.845 | 8.341 |
| Percentage of MinorityInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.6 | 0.7 | 0.7 | 0.5 | 1.2 | 1.1 | 1.1 | 1.0 | -0.6 | -0.6 | -0.6 | -0.6 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.4 | -0.5 | -0.4 | -0.4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.6 | 0.4 | 0.5 | 0.6 | 0.6 | 0.5 | 0.5 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 68 | 89 | 85 | 56 | 198 | 193 | 188 | 176 | -43.685 | -43.806 | -42.954 | -42.428 | -40.205 | -39.013 |
| Percentage of MinorityInterest | 94.4 | 95.7 | 95.5 | 93.3 | 98.0 | 98.0 | 97.9 | 97.8 | 108.9 | 108.8 | 111.5 | 111.7 | 112.5 | 113.5 |
| Percentage of Assets | 0.5 | 0.7 | 0.6 | 0.4 | 1.2 | 1.1 | 1.1 | 1.0 | -0.7 | -0.7 | -0.7 | -0.6 | -0.6 | -0.6 |
| Percentage of Assets srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 0.9 | 1.2 | 1.1 | 0.8 | 1.8 | 1.7 | 1.6 | 1.4 | -9.9 | -8.7 | -8.5 | -8.4 | -8.4 | -7.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 |
| Value | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.569 | 3.558 | 4.438 | 4.449 | 4.456 | 4.641 |
| Percentage of MinorityInterest | 5.6 | 4.3 | 4.5 | 6.7 | 2.0 | 2.0 | 2.1 | 2.2 | -8.9 | -8.8 | -11.5 | -11.7 | -12.5 | -13.5 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets srt:ConsolidationEliminations | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | 20 | 30 | 13 | 12 | 4.0 | 3.0 | 12 | 11 | 0.954 | 2.831 | 2.03 | 3.355 | 0.853 | 2.663 | 1.947 | 2.421 | 2.34 | 15 | 2.359 | 3.993 | 1.657 | 2.713 | 3.263 | 4.191 | -0.355 | 2.819 | 3.89 | 0.342 | 2.444 | 0.26 | 0.317 | 0.225 | 0.385 | 9.329 | 0.408 | 0.272 | 0.374 | 0.088 | -0.076 | 0.104 | 0.039 |
| Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 |
| Value | 20 | 30 | 13 | 12 | 4.0 | 3.0 | 12 | 11 | 0.954 | 2.831 | 2.03 | 3.355 | 0.853 | 2.663 | 1.947 | 2.421 | 2.34 | 15 | 2.359 | 3.993 | 1.657 | 2.713 | 3.263 | 4.191 | -0.355 | 2.819 | 3.89 | 0.342 | 2.444 | 0.26 | 0.317 | 0.225 | 0.385 | 9.329 | 0.408 | 0.272 | 0.374 | 0.088 | -0.076 | 0.104 |
| Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:NoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 194 | -206.0 | 709 | 505 | 373 | -39.0 | 422 | 271 | 123 | 99 | 274 | 116 | 155 | 100 | 152 | 136 | 71 | 69 | 261 | 120 | 75 | 134 | 89 | 133 | 66 | 111 | 72 | 178 | 43 | 136 | 9.938 | 97 | 3.668 | 49 | 74 | 83 | 12 | 67 | 20 | 60 | 12 | 54 | 48 | 47 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 12.0 | -13.6 | 46.9 | 32.8 | 29.1 | -2.4 | 26.0 | 24.1 | 16.0 | 13.8 | 30.7 | 15.2 | 21.3 | 15.2 | 20.8 | 20.4 | 10.6 | 10.7 | 32.8 | 17.4 | 11.3 | 23.2 | 14.6 | 24.3 | 12.0 | 22.1 | 11.7 | 36.0 | 9.6 | 33.0 | 2.3 | 28.7 | 1.2 | 17.6 | 22.5 | 31.9 | 5.0 | 30.1 | 9.5 | 33.5 | 6.9 | 30.1 | 21.2 | 25.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 224 | 113 | 383 | 168 | 159 | 154 | 196 | 209 | 173 | 154 | 314 | 207 | 220 | 193 | 166 | 200 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 115.5 | -54.9 | 54.0 | 33.3 | 42.6 | -394.9 | 46.4 | 77.4 | 141.4 | 154.6 | 114.5 | 178.8 | 141.7 | 191.9 | 109.3 | 146.6 |
| Percentage of Revenues | 13.9 | 7.5 | 25.3 | 10.9 | 12.4 | 9.6 | 12.1 | 18.7 | 22.6 | 21.3 | 35.2 | 27.1 | 30.2 | 29.1 | 22.7 | 29.9 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 30.1 | 16.0 | 40.7 | 21.7 | 25.4 | 20.8 | 25.2 | 29.9 | 24.7 | 23.5 | 37.6 | 29.1 | 32.4 | 31.0 | 24.8 | 32.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 64 | -332.0 | 365 | 267 | 280 | -37.0 | 239 | 134 | 8.944 | 13 | -21.744 | -9.098 | 0.993 | -10.684 | 25 | -8.288 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 33.0 | 161.2 | 51.5 | 52.9 | 75.1 | 94.9 | 56.6 | 49.7 | 7.3 | 13.3 | -7.9 | -7.8 | 0.6 | -10.6 | 16.6 | -6.1 |
| Percentage of Revenues | 4.0 | -22.0 | 24.1 | 17.3 | 21.8 | -2.3 | 14.7 | 12.0 | 1.2 | 1.8 | -2.4 | -1.2 | 0.1 | -1.6 | 3.5 | -1.2 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 7.2 | -40.6 | 61.2 | 34.0 | 41.7 | -4.1 | 27.4 | 30.3 | 10.1 | 15.9 | -25.1 | -11.8 | 1.4 | -18.4 | 41.5 | -17.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 7.0 | -18.0 | -4.0 | 9.0 | -9.0 | -115.0 | -1.0 | -3.802 | -0.416 | 0.218 | -0.211 | -7.135 | -2.5 | 1.304 | -3.054 | -7.635 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 3.6 | 8.7 | -0.6 | 1.8 | -2.4 | 294.9 | -0.2 | -1.4 | -0.3 | 0.2 | -0.1 | -6.1 | -1.6 | 1.3 | -2.0 | -5.6 |
| Percentage of Revenues | 0.4 | -1.2 | -0.3 | 0.6 | -0.7 | -7.1 | -0.1 | -0.3 | -0.1 | 0.0 | -0.0 | -0.9 | -0.3 | 0.2 | -0.4 | -1.1 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -102.0 | 30 | -36.0 | 59 | -58.0 | -40.0 | -22.0 | -65.905 | -56.195 | -65.9 | -20.842 | -77.682 | -65.889 | -88.587 | -39.76 | -49.377 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | -52.6 | -14.6 | -5.1 | 11.7 | -15.5 | 102.6 | -5.2 | -24.3 | -45.7 | -66.1 | -7.6 | -66.8 | -42.3 | -87.8 | -26.0 | -36.1 |
| Percentage of Revenues | -6.3 | 2.0 | -2.4 | 3.8 | -4.5 | -2.5 | -1.4 | -5.9 | -7.3 | -9.1 | -2.3 | -10.1 | -9.0 | -13.3 | -5.4 | -7.4 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | -364.3 | 111.1 | -138.5 | 236.0 | -232.0 | -166.7 | -84.6 | -732.3 | 0.0 | -1647500.0 | 347366.7 | -1294700.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.0 | 1.0 | 1.0 | 2.0 | 1.0 | -1.0 | 10.0 | -3.8 | -3.242 | -1.958 | 2.705 | 2.336 | 2.497 | 5.185 | 3.765 | 1.471 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 0.5 | -0.5 | 0.1 | 0.4 | 0.3 | 2.6 | 2.4 | -1.4 | -2.6 | -2.0 | 1.0 | 2.0 | 1.6 | 5.1 | 2.5 | 1.1 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | -0.1 | 0.6 | -0.3 | -0.4 | -0.3 | 0.3 | 0.3 | 0.3 | 0.8 | 0.5 | 0.2 |
| Percentage of Revenues srt:ConsolidationEliminations | -2.2 | -2.6 | -2.0 | -4.3 | -2.5 | 2.1 | -19.2 | 12.3 | 14.4 | 11.2 | -9.5 | -9.4 | -11.5 | -28.3 | -16.6 | -8.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | -115.0 | -26.0 | -61.0 | -27.0 | -48.0 | -23.0 | -53.0 | -9395.551 | -34.294 | -47.155 | -31.723 | -29.073 | -36.465 | -20.95 | -36.863 | -262.529 | -53.792 | 155 | -48.476 | -29.077 | -73.814 | -454.636 | -23.778 | -37.64 | -61.98 | -27.913 | -250.494 | -1115.556 | -29.34 | -1.966 | -494.499 | -430.106 | -111.694 | -14.942 | -540.021 | -52.867 | -355.436 | -200.96 | -54.714 | -32.123 | -17.187 | -8.224 | -0.548 | 4.702 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -7.1 | -1.7 | -4.0 | -1.8 | -3.7 | -1.4 | -3.3 | -835.2 | -4.4 | -6.5 | -3.6 | -3.8 | -5.0 | -3.1 | -5.0 | -39.1 | -7.9 | 23.9 | -6.1 | -4.2 | -11.1 | -78.5 | -3.9 | -6.9 | -11.2 | -5.5 | -40.8 | -225.4 | -6.4 | -0.5 | -115.6 | -127.0 | -35.6 | -5.3 | -163.9 | -20.3 | -140.2 | -89.8 | -25.7 | -17.8 | -9.2 | -4.5 | -0.2 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -19.0 | 12 | -21.0 | -1.0 | -32.0 | -11.0 | -54.0 | -19.402 | -34.395 | -37.203 | -24.504 | -32.031 | -34.15 | -25.234 | 95 | -74.296 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 16.5 | -46.2 | 34.4 | 3.7 | 66.7 | 47.8 | 101.9 | 0.2 | 100.3 | 78.9 | 77.2 | 110.2 | 93.7 | 120.4 | -258.7 | 28.3 |
| Percentage of Revenues | -1.2 | 0.8 | -1.4 | -0.1 | -2.5 | -0.7 | -3.3 | -1.7 | -4.5 | -5.2 | -2.7 | -4.2 | -4.7 | -3.8 | 13.0 | -11.1 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | -2.6 | 1.7 | -2.2 | -0.1 | -5.1 | -1.5 | -6.9 | -2.8 | -4.9 | -5.7 | -2.9 | -4.5 | -5.0 | -4.0 | 14.1 | -12.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -93.0 | -27.0 | -21.0 | 0.0 | -13.0 | -9.0 | 7.0 | -9353.231 | -1.955 | -1.814 | -1.368 | 5.187 | 0.038 | 7.052 | -147.594 | 122 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 80.9 | 103.8 | 34.4 | -0.0 | 27.1 | 39.1 | -13.2 | 99.5 | 5.7 | 3.8 | 4.3 | -17.8 | -0.1 | -33.7 | 400.4 | -46.6 |
| Percentage of Revenues | -5.8 | -1.8 | -1.4 | 0.0 | -1.0 | -0.6 | 0.4 | -831.4 | -0.3 | -0.3 | -0.2 | 0.7 | 0.0 | 1.1 | -20.1 | 18.2 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -10.5 | -3.3 | -3.5 | 0.0 | -1.9 | -1.0 | 0.8 | -2101.8 | -2.2 | -2.2 | -1.6 | 6.8 | 0.1 | 12.2 | -241.1 | 256.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -4.0 | -2.0 | -41.0 | -1.0 | 0.0 | 0.0 | -4.0 | 0.299 | -0.399 | -1.9 | -0.82 | 2.197 | 1.094 | 1.339 | 2.694 | 1.623 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 3.5 | 7.7 | 67.2 | 3.7 | -0.0 | -0.0 | 7.5 | -0.0 | 1.2 | 4.0 | 2.6 | -7.6 | -3.0 | -6.4 | -7.3 | -0.6 |
| Percentage of Revenues | -0.2 | -0.1 | -2.7 | -0.1 | 0.0 | 0.0 | -0.2 | 0.0 | -0.1 | -0.3 | -0.1 | 0.3 | 0.1 | 0.2 | 0.4 | 0.2 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 0.0 | -10.0 | 21 | -26.0 | -4.0 | -7.0 | -4.0 | -27.263 | -0.537 | -8.2 | -6.331 | -5.867 | -4.695 | -4.107 | 12 | -2.338 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | -0.0 | 38.5 | -34.4 | 96.3 | 8.3 | 30.4 | 7.5 | 0.3 | 1.6 | 17.4 | 20.0 | 20.2 | 12.9 | 19.6 | -33.2 | 0.9 |
| Percentage of Revenues | 0.0 | -0.7 | 1.4 | -1.7 | -0.3 | -0.4 | -0.2 | -2.4 | -0.1 | -1.1 | -0.7 | -0.8 | -0.6 | -0.6 | 1.7 | -0.3 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 0.0 | -37.0 | 80.8 | -104.0 | -16.0 | -29.2 | -15.4 | -302.9 | 0.0 | -205000.0 | 105516.7 | -97783.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 4.0 | 2.0 | 4.046 | 2.992 | 1.962 | 0.958 | 1.441 | 1.248 | 0.0 | 1.699 | 0.997 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | -0.9 | -3.8 | -1.6 | -3.7 | -2.1 | -17.4 | -3.8 | -0.0 | -8.7 | -4.2 | -3.0 | -5.0 | -3.4 | -0.0 | -4.6 | -0.4 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.4 | 0.4 | 0.3 | 0.1 | 0.2 | 0.2 | 0.0 | 0.2 | 0.1 |
| Percentage of Revenues srt:ConsolidationEliminations | -2.2 | -2.6 | -2.0 | -2.2 | -2.5 | -8.5 | -3.8 | -13.1 | -13.3 | -11.3 | -3.3 | -5.8 | -5.7 | -0.0 | -7.5 | -5.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | -56.0 | -85.0 | -19.0 | -467.0 | -1045.0 | 71 | -435.0 | 9594 | -135.031 | -137.503 | -206.942 | -78.876 | -141.361 | -37.638 | -36.697 | -68.254 | -37.701 | 330 | -57.591 | -90.707 | -39.626 | 312 | -34.846 | -41.022 | 2.319 | -43.545 | 96 | 640 | 63 | -96.587 | 535 | 11 | 633 | -31.8 | 444 | -16.615 | 346 | 147 | -13.849 | -17.883 | -68.94 | 55 | -67.001 | -52.795 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -3.5 | -5.6 | -1.3 | -30.3 | -81.4 | 4.4 | -26.8 | 852.8 | -17.5 | -19.0 | -23.2 | -10.3 | -19.4 | -5.7 | -5.0 | -10.2 | -5.6 | 50.9 | -7.2 | -13.1 | -5.9 | 53.9 | -5.7 | -7.5 | 0.4 | -8.6 | 15.8 | 129.5 | 13.9 | -23.4 | 125.2 | 3.3 | 201.5 | -11.3 | 134.8 | -6.4 | 136.8 | 65.8 | -6.5 | -9.9 | -36.9 | 30.3 | -29.6 | -28.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -207.0 | -120.0 | -366.0 | -166.0 | -127.0 | -143.0 | -148.0 | -183.916 | -139.966 | -133.118 | -281.767 | -174.532 | -410.89 | -257.012 | -148.824 | 67 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 369.6 | 141.2 | 1926.3 | 35.5 | 12.2 | -201.4 | 34.0 | -1.9 | 103.7 | 96.8 | 136.2 | 221.3 | 290.7 | 682.9 | 405.5 | -98.6 |
| Percentage of Revenues | -12.8 | -7.9 | -24.2 | -10.8 | -9.9 | -8.9 | -9.1 | -16.3 | -18.2 | -18.4 | -31.5 | -22.8 | -56.3 | -38.6 | -20.3 | 10.0 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | -27.8 | -17.0 | -38.9 | -21.4 | -20.3 | -19.4 | -19.0 | -26.2 | -19.9 | -20.3 | -33.7 | -24.4 | -60.4 | -41.1 | -22.1 | 10.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 21 | -9.0 | 93 | -351.0 | -315.0 | -428.0 | -425.0 | 10335 | -74.886 | 11 | 35 | 20 | 35 | -10.592 | -6.194 | 13 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | -37.5 | 10.6 | -489.5 | 75.2 | 30.1 | -602.8 | 97.7 | 107.7 | 55.5 | -8.7 | -17.3 | -26.1 | -25.3 | 28.1 | 16.9 | -20.0 |
| Percentage of Revenues | 1.3 | -0.6 | 6.2 | -22.8 | -24.6 | -26.6 | -26.2 | 918.7 | -9.7 | 1.7 | 4.0 | 2.7 | 4.9 | -1.6 | -0.8 | 2.0 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 2.4 | -1.1 | 15.6 | -44.7 | -46.9 | -47.9 | -48.8 | 2322.7 | -84.4 | 14.4 | 41.4 | 26.8 | 49.9 | -18.3 | -10.1 | 28.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -3.0 | 20 | 45 | -8.0 | 9.0 | 115 | 5.0 | 3.503 | 0.815 | 1.682 | 1.031 | 4.938 | 1.406 | -2.643 | 0.36 | 6.012 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 5.4 | -23.5 | -236.8 | 1.7 | -0.9 | 162.0 | -1.1 | 0.0 | -0.6 | -1.2 | -0.5 | -6.3 | -1.0 | 7.0 | -1.0 | -8.8 |
| Percentage of Revenues | -0.2 | 1.3 | 3.0 | -0.5 | 0.7 | 7.1 | 0.3 | 0.3 | 0.1 | 0.2 | 0.1 | 0.6 | 0.2 | -0.4 | 0.0 | 0.9 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 135 | 26 | 211 | 61 | -610.0 | 530 | 145 | -560.734 | 78 | -18.022 | 42 | 73 | 236 | 237 | 122 | -152.777 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | -241.1 | -30.6 | -1110.5 | -13.1 | 58.4 | 746.5 | -33.3 | -5.8 | -58.3 | 13.1 | -20.4 | -93.7 | -167.0 | -631.8 | -333.8 | 223.8 |
| Percentage of Revenues | 8.4 | 1.7 | 14.0 | 4.0 | -47.5 | 32.9 | 8.9 | -49.8 | 10.2 | -2.5 | 4.7 | 9.6 | 32.3 | 35.7 | 16.7 | -22.8 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 482.1 | 96.3 | 811.5 | 244.0 | -2440.0 | 2208.3 | 557.7 | -6230.4 | 0.0 | -450550.0 | -704050.0 | 1231633.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -2.0 | -2.0 | -2.0 | -3.0 | -2.0 | -3.0 | -12.0 | -0.246 | 0.25 | -0.004 | -3.663 | -3.777 | -3.745 | -5.185 | -5.464 | -2.468 |
| Percentage of NetCashProvidedByUsedInFinancingActivities | 3.6 | 2.4 | 10.5 | 0.6 | 0.2 | -4.2 | 2.8 | -0.0 | -0.2 | 0.0 | 1.8 | 4.8 | 2.6 | 13.8 | 14.9 | 3.6 |
| Percentage of Revenues | -0.1 | -0.1 | -0.1 | -0.2 | -0.2 | -0.2 | -0.7 | -0.0 | 0.0 | -0.0 | -0.4 | -0.5 | -0.5 | -0.8 | -0.7 | -0.4 |
| Percentage of Revenues srt:ConsolidationEliminations | 4.3 | 5.1 | 3.9 | 6.5 | 5.0 | 6.4 | 23.1 | 0.8 | -1.1 | 0.0 | 12.8 | 15.1 | 17.2 | 28.3 | 24.1 | 13.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 23 | -317.0 | 629 | 11 | -720.0 | 9.0 | -66.0 | 470 | -46.309 | -84.983 | 35 | 8.258 | -22.071 | 42 | 79 | 116 | -20.851 | 560 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 1.4 | -21.0 | 41.6 | 0.7 | -56.1 | 0.6 | -4.1 | 41.8 | -6.0 | -11.8 | 4.0 | 1.1 | -3.0 | 6.4 | 10.8 | 17.4 | -3.1 | 86.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -2.0 | 5.0 | -4.0 | 1.0 | 0.0 | 0.0 | -6.0 | 6.653 | -0.436 | -16.217 | 7.949 | 1.223 | -224.386 | -88.521 | 113 | 193 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | -8.7 | -1.6 | -0.6 | 9.1 | -0.0 | 0.0 | 9.1 | 1.4 | 0.9 | 19.1 | 22.2 | 14.8 | 1016.7 | -209.0 | 142.7 | 165.7 |
| Percentage of Revenues | -0.1 | 0.3 | -0.3 | 0.1 | 0.0 | 0.0 | -0.4 | 0.6 | -0.1 | -2.2 | 0.9 | 0.2 | -30.7 | -13.3 | 15.4 | 28.9 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | -0.3 | 0.7 | -0.4 | 0.1 | 0.0 | 0.0 | -0.8 | 0.9 | -0.1 | -2.5 | 1.0 | 0.2 | -33.0 | -14.1 | 16.8 | 31.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -8.0 | -368.0 | 437 | -84.0 | -48.0 | -474.0 | -179.0 | 1117 | -67.897 | 23 | 12 | 16 | 36 | -14.224 | -128.405 | 127 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | -34.8 | 116.1 | 69.5 | -763.6 | 6.7 | -5266.7 | 271.2 | 237.6 | 146.6 | -27.5 | 35.4 | 202.1 | -166.9 | -33.6 | -161.6 | 109.2 |
| Percentage of Revenues | -0.5 | -24.4 | 28.9 | -5.5 | -3.7 | -29.5 | -11.0 | 99.3 | -8.8 | 3.2 | 1.4 | 2.2 | 5.0 | -2.1 | -17.5 | 19.0 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -0.9 | -45.0 | 73.3 | -10.7 | -7.2 | -53.1 | -20.6 | 251.1 | -76.5 | 28.1 | 14.7 | 21.7 | 51.4 | -24.5 | -209.7 | 267.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 33 | 46 | 196 | 94 | -672.0 | 483 | 119 | -653.902 | 22 | -92.122 | 15 | -9.651 | 165 | 145 | 94 | -204.492 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | 143.5 | -14.5 | 31.2 | 854.5 | 93.3 | 5366.7 | -180.3 | -139.0 | -47.6 | 108.4 | 42.0 | -116.9 | -749.8 | 342.6 | 119.5 | -174.8 |
| Percentage of Revenues | 2.0 | 3.0 | 13.0 | 6.1 | -52.4 | 30.0 | 7.3 | -58.1 | 2.9 | -12.8 | 1.7 | -1.3 | 22.7 | 21.8 | 12.9 | -30.5 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 117.9 | 170.4 | 753.8 | 376.0 | -2688.0 | 2012.5 | 457.7 | -7265.6 | 0.0 | -2303050.0 | -251166.7 | -160850.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 147 | 153 | 150 | 174 | 176 | 174 | 172 | 120 | 65 | 66 | 74 | 70 | 66 | 70 |
| Percentage of DepreciationDepletionAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 6.0 | 8.0 | 7.0 | 6.0 |
| Percentage of DepreciationDepletionAndAmortization | 4.1 | 5.2 | 4.0 | 3.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | -1.0 | -1.0 | -1.0 | -1.0 | 0.0 | 0.0 | 0.0 | -1.0 | 0.0 | 0.0 |
| Percentage of DepreciationDepletionAndAmortization | -0.7 | -0.7 | -0.7 | -0.6 | 0.0 | 0.0 | 0.0 | -0.8 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 64 | 62 | 61 | 60 | 60 | 58 | 63 | 61 | 60 |
| Percentage of DepreciationDepletionAndAmortization | 43.5 | 40.5 | 40.7 | 34.5 | 34.1 | 33.3 | 36.6 | 50.8 | 91.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 78 | 84 | 82 | 109 | 109 | 110 | 103 | 54 | 0.0 |
| Percentage of DepreciationDepletionAndAmortization | 53.1 | 54.9 | 54.7 | 62.6 | 61.9 | 63.2 | 59.9 | 45.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 8.0 | 6.0 | 7.0 | 6.0 | 6.0 | 6.0 | 6.0 | 3.0 |
| Percentage of DepreciationDepletionAndAmortization | 5.3 | 3.4 | 4.0 | 3.4 | 3.5 | 5.0 | 9.1 | 4.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 96 | -6.0 | -46.0 | 124 | -114.0 | -34.0 | -7.0 | -57.514 | 10 | -15.987 | -11.243 | 44 | 29 | -26.504 | 44 | -28.462 | 27 | -1.543 | -5.4 | 30 | 73 | -26.918 | 39 | 2.87 | 16 | -19.619 | 61 | -10.214 | 10 | -17.498 | 53 | 9.235 | 14 | 13 | 33 | -8.825 | 7.394 | -8.37 | 15 | -4.183 | 8.308 | -7.579 | 15 | -6.674 |
| Percentage of IncreaseDecreaseInAccountsReceivable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 194 | -206.0 | 709 | 505 | 373 | -39.0 | 422 | 271 | 123 | 99 | 274 | 116 | 155 | 100 | 152 | 136 | 71 | 69 | 261 | 120 | 75 | 134 | 89 | 133 | 66 | 111 | 72 | 178 | 43 | 136 | 9.938 | 97 | 3.668 | 49 | 74 | 83 | 12 | 67 | 20 | 60 | 12 | 54 | 48 | 47 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 12.0 | -13.6 | 46.9 | 32.8 | 29.1 | -2.4 | 26.0 | 24.1 | 16.0 | 13.8 | 30.7 | 15.2 | 21.3 | 15.2 | 20.8 | 20.4 | 10.6 | 10.7 | 32.8 | 17.4 | 11.3 | 23.2 | 14.6 | 24.3 | 12.0 | 22.1 | 11.7 | 36.0 | 9.6 | 33.0 | 2.3 | 28.7 | 1.2 | 17.6 | 22.5 | 31.9 | 5.0 | 30.1 | 9.5 | 33.5 | 6.9 | 30.1 | 21.2 | 25.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 224 | 113 | 383 | 168 | 159 | 154 | 196 | 209 | 173 | 154 | 314 | 207 | 220 | 193 | 166 | 200 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 115.5 | -54.9 | 54.0 | 33.3 | 42.6 | -394.9 | 46.4 | 77.4 | 141.4 | 154.6 | 114.5 | 178.8 | 141.7 | 191.9 | 109.3 | 146.6 |
| Percentage of Revenues | 13.9 | 7.5 | 25.3 | 10.9 | 12.4 | 9.6 | 12.1 | 18.7 | 22.6 | 21.3 | 35.2 | 27.1 | 30.2 | 29.1 | 22.7 | 29.9 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 30.1 | 16.0 | 40.7 | 21.7 | 25.4 | 20.8 | 25.2 | 29.9 | 24.7 | 23.5 | 37.6 | 29.1 | 32.4 | 31.0 | 24.8 | 32.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 64 | -332.0 | 365 | 267 | 280 | -37.0 | 239 | 134 | 8.944 | 13 | -21.744 | -9.098 | 0.993 | -10.684 | 25 | -8.288 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 33.0 | 161.2 | 51.5 | 52.9 | 75.1 | 94.9 | 56.6 | 49.7 | 7.3 | 13.3 | -7.9 | -7.8 | 0.6 | -10.6 | 16.6 | -6.1 |
| Percentage of Revenues | 4.0 | -22.0 | 24.1 | 17.3 | 21.8 | -2.3 | 14.7 | 12.0 | 1.2 | 1.8 | -2.4 | -1.2 | 0.1 | -1.6 | 3.5 | -1.2 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | 7.2 | -40.6 | 61.2 | 34.0 | 41.7 | -4.1 | 27.4 | 30.3 | 10.1 | 15.9 | -25.1 | -11.8 | 1.4 | -18.4 | 41.5 | -17.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 7.0 | -18.0 | -4.0 | 9.0 | -9.0 | -115.0 | -1.0 | -3.802 | -0.416 | 0.218 | -0.211 | -7.135 | -2.5 | 1.304 | -3.054 | -7.635 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 3.6 | 8.7 | -0.6 | 1.8 | -2.4 | 294.9 | -0.2 | -1.4 | -0.3 | 0.2 | -0.1 | -6.1 | -1.6 | 1.3 | -2.0 | -5.6 |
| Percentage of Revenues | 0.4 | -1.2 | -0.3 | 0.6 | -0.7 | -7.1 | -0.1 | -0.3 | -0.1 | 0.0 | -0.0 | -0.9 | -0.3 | 0.2 | -0.4 | -1.1 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -102.0 | 30 | -36.0 | 59 | -58.0 | -40.0 | -22.0 | -65.905 | -56.195 | -65.9 | -20.842 | -77.682 | -65.889 | -88.587 | -39.76 | -49.377 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | -52.6 | -14.6 | -5.1 | 11.7 | -15.5 | 102.6 | -5.2 | -24.3 | -45.7 | -66.1 | -7.6 | -66.8 | -42.3 | -87.8 | -26.0 | -36.1 |
| Percentage of Revenues | -6.3 | 2.0 | -2.4 | 3.8 | -4.5 | -2.5 | -1.4 | -5.9 | -7.3 | -9.1 | -2.3 | -10.1 | -9.0 | -13.3 | -5.4 | -7.4 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | -364.3 | 111.1 | -138.5 | 236.0 | -232.0 | -166.7 | -84.6 | -732.3 | 0.0 | -1647500.0 | 347366.7 | -1294700.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.0 | 1.0 | 1.0 | 2.0 | 1.0 | -1.0 | 10.0 | -3.8 | -3.242 | -1.958 | 2.705 | 2.336 | 2.497 | 5.185 | 3.765 | 1.471 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 0.5 | -0.5 | 0.1 | 0.4 | 0.3 | 2.6 | 2.4 | -1.4 | -2.6 | -2.0 | 1.0 | 2.0 | 1.6 | 5.1 | 2.5 | 1.1 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | -0.1 | 0.6 | -0.3 | -0.4 | -0.3 | 0.3 | 0.3 | 0.3 | 0.8 | 0.5 | 0.2 |
| Percentage of Revenues srt:ConsolidationEliminations | -2.2 | -2.6 | -2.0 | -4.3 | -2.5 | 2.1 | -19.2 | 12.3 | 14.4 | 11.2 | -9.5 | -9.4 | -11.5 | -28.3 | -16.6 | -8.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2011-06-30 | 2010-06-30 |
| Value | -332.0 | -12.0 | -3256.0 | 252 | 123 | -60.0 | 42 | 22 | 64 | 28 | 18 | 17 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | -0.8 | -211.6 | 19.6 | 7.6 | -5.3 | 5.5 | 3.0 | 8.4 | 3.8 | 10.0 | 9.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 117 | 89 | 304 | 67 | 176 | 203 | 119 | 91 | 156 | 129 |
| Percentage of NetIncomeLoss | -35.2 | -741.7 | -9.3 | 26.6 | 143.1 | -338.3 | 281.8 | 413.6 | 243.8 | 461.1 |
| Percentage of Revenues | 7.3 | 5.9 | 19.8 | 5.2 | 10.9 | 18.0 | 15.5 | 12.6 | 20.4 | 17.7 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 15.7 | 12.6 | 39.3 | 10.7 | 23.8 | 28.9 | 16.9 | 13.9 | 21.8 | 19.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | -337.0 | -73.0 | -3568.0 | 240 | 3.0 | -105.0 | 0.151 | -3.0 | -9.0 | -9.883 |
| Percentage of NetIncomeLoss | 101.5 | 608.3 | 109.6 | 95.2 | 2.4 | 175.0 | 0.4 | -13.6 | -14.1 | -35.2 |
| Percentage of Revenues | -20.9 | -4.8 | -231.8 | 18.7 | 0.2 | -9.3 | 0.0 | -0.4 | -1.2 | -1.4 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -38.0 | -8.9 | -453.9 | 35.8 | 0.3 | -23.6 | 0.2 | -3.6 | -11.7 | -13.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | -332.0 | -12.0 | -3256.0 | 252 | 123 | -60.0 | 42 | 22 | 64 | 28 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.6 | -0.8 | -211.6 | 19.6 | 7.6 | -5.3 | 5.5 | 3.0 | 8.4 | 3.8 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 90 | 24 | 314 | 14 | 124 | 140 | 54 | 22 | 70 | 35 |
| Percentage of NetIncomeLoss | -27.1 | -200.0 | -9.6 | 5.6 | 100.8 | -233.3 | 128.3 | 100.0 | 109.4 | 125.3 |
| Percentage of Revenues | 5.6 | 1.6 | 20.4 | 1.1 | 7.7 | 12.4 | 7.0 | 3.0 | 9.1 | 4.8 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 321.4 | 88.9 | 1256.0 | 56.0 | 516.7 | 1555.6 | 0.0 | 550000.0 | 1166666.7 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 |
| Value | 130 | -40.0 | 2950 | -321.0 | -303.0 | -238.0 | -173.627 | -110.0 | -217.0 | -154.55 |
| Percentage of NetIncomeLoss | -39.2 | 333.3 | -90.6 | -127.4 | -246.3 | 396.7 | -410.5 | -500.0 | -339.1 | -551.2 |
| Percentage of Revenues | 8.1 | -2.6 | 191.7 | -25.0 | -18.8 | -21.2 | -22.5 | -15.2 | -28.3 | -21.2 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | -6413.0 | 802.5 | 644.7 | 767.7 | 771.5 | 630.8 | 869.4 | 711.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | -328.0 | 26 | 514 | -3367.0 | 273 | 151 | 87 | -49.0 | 43 | 22 | 207 | 65 | 29 | 43 | 444 | 32 | 46 | 70 | 122 | 52 | 50 | 25 | 60 | 44 | 46 | 24 | 97 | 48 | 41 | 27 | 4.237 | 36 | 18 | 16 | 59 | 26 | 30 | 29 | 23 | 19 | 18 | 15 | 32 | 14 | 16 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -20.3 | 1.7 | 34.0 | -218.8 | 21.3 | 9.4 | 5.4 | -4.4 | 5.6 | 3.2 | 23.2 | 8.5 | 4.0 | 6.6 | 60.6 | 4.9 | 6.8 | 10.9 | 15.4 | 7.5 | 7.6 | 4.4 | 9.9 | 8.0 | 8.4 | 4.9 | 15.8 | 9.9 | 9.1 | 6.7 | 1.0 | 10.8 | 5.7 | 6.0 | 18.0 | 10.1 | 11.9 | 13.0 | 10.9 | 10.7 | 9.9 | 8.3 | 14.6 | 7.6 | 9.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 117 | 89 | 340 | 304 | 67 | 176 | 169 | 203 | 119 | 90 | 271 | 156 | 129 | 172 | 522 | 90 | 98 |
| Percentage of ProfitLoss | -35.7 | 342.3 | 66.1 | -9.0 | 24.5 | 116.6 | 194.3 | -414.3 | 274.8 | 398.3 | 130.9 | 240.5 | 441.2 | 393.2 | 117.4 | 277.7 | 212.9 |
| Percentage of Revenues | 7.3 | 5.9 | 22.5 | 19.8 | 5.2 | 10.9 | 10.4 | 18.0 | 15.5 | 12.6 | 30.4 | 20.4 | 17.7 | 26.0 | 71.1 | 13.5 | 14.4 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | 15.7 | 12.6 | 36.1 | 39.3 | 10.7 | 23.8 | 21.8 | 28.9 | 16.9 | 13.8 | 32.5 | 21.9 | 19.0 | 27.6 | 77.5 | 14.7 | 15.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -333.0 | -35.0 | 240 | -3679.0 | 261 | 31 | -22.0 | -94.0 | 1.223 | -0.797 | -14.393 | -7.617 | -8.615 | -56.787 | -19.288 | -11.704 | -5.673 |
| Percentage of ProfitLoss | 101.5 | -134.6 | 46.7 | 109.3 | 95.6 | 20.5 | -25.3 | 191.8 | 2.8 | -3.5 | -6.9 | -11.7 | -29.4 | -129.1 | -4.3 | -35.9 | -12.3 |
| Percentage of Revenues | -20.7 | -2.3 | 15.9 | -239.1 | 20.3 | 1.9 | -1.4 | -8.4 | 0.2 | -0.1 | -1.6 | -1.0 | -1.2 | -8.5 | -2.6 | -1.7 | -0.8 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -37.6 | -4.3 | 40.3 | -468.1 | 38.9 | 3.5 | -2.5 | -21.1 | 1.4 | -1.0 | -16.6 | -9.9 | -12.0 | -97.9 | -31.5 | -24.5 | -11.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -332.0 | -12.0 | 467 | -3256.0 | 252 | 123 | 43 | -60.0 | 42 | 21 | 206 | 63 | 28 | 43 | 443 | 30 | 44 |
| Percentage of ProfitLoss | 101.2 | -46.2 | 90.9 | 96.7 | 92.3 | 81.5 | 49.4 | 122.4 | 97.5 | 95.2 | 99.3 | 98.3 | 95.7 | 98.0 | 99.7 | 94.1 | 97.0 |
| Percentage of Revenues | -20.6 | -0.8 | 30.9 | -211.6 | 19.6 | 7.6 | 2.7 | -5.3 | 5.5 | 3.0 | 23.1 | 8.3 | 3.8 | 6.5 | 60.4 | 4.6 | 6.6 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 90 | 24 | 256 | 314 | 14 | 124 | 112 | 140 | 54 | 22 | 219 | 69 | 35 | 98 | 456 | 42 | 48 |
| Percentage of ProfitLoss | -27.4 | 92.3 | 49.8 | -9.3 | 5.1 | 82.1 | 128.7 | -285.7 | 125.1 | 96.7 | 105.5 | 106.8 | 119.8 | 223.4 | 102.7 | 129.9 | 106.3 |
| Percentage of Revenues | 5.6 | 1.6 | 16.9 | 20.4 | 1.1 | 7.7 | 6.9 | 12.4 | 7.0 | 3.0 | 24.5 | 9.1 | 4.8 | 14.8 | 62.2 | 6.3 | 7.2 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 321.4 | 88.9 | 984.6 | 1256.0 | 56.0 | 516.7 | 430.8 | 1555.6 | 0.0 | 550225.0 | -3652450.0 | 1157350.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 130 | -40.0 | -789.0 | 2950 | -321.0 | -303.0 | -215.0 | -238.0 | -173.613 | -110.816 | -474.916 | -216.999 | -154.55 | -213.604 | -958.333 | -119.12 | -139.886 |
| Percentage of ProfitLoss | -39.6 | -153.8 | -153.5 | -87.6 | -117.6 | -200.7 | -247.1 | 485.7 | -400.2 | -486.7 | -228.7 | -333.8 | -527.3 | -485.5 | -215.5 | -365.8 | -303.9 |
| Percentage of Revenues | 8.1 | -2.6 | -52.2 | 191.7 | -25.0 | -18.8 | -13.3 | -21.2 | -22.5 | -15.3 | -53.2 | -28.3 | -21.2 | -32.1 | -130.6 | -17.8 | -20.6 |
| Percentage of Revenues srt:ConsolidationEliminations | -282.6 | 102.6 | 1547.1 | -6413.0 | 802.5 | 644.7 | 413.5 | 767.7 | 771.5 | 635.4 | 1660.5 | 869.4 | 711.7 | 1164.6 | 4224.3 | 660.9 | 665.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2012-12-31 |
| Value | 10.0 | 33 | 13 | 10.0 | 12 | 17 | 7.0 | 6.364 | 8.817 | 10 | 5.684 | 7.092 | 6.784 | 6.956 | 2.981 | 1.457 | 3.877 | 7.571 | 3.469 | 3.501 | 3.641 | 6.328 | 3.537 | 3.201 | 4.52 | 7.057 | 2.863 | 3.003 | 3.661 | 4.769 | 2.252 | 1.525 | 1.099 |
| Percentage of ShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | -115.0 | -26.0 | -61.0 | -27.0 | -48.0 | -23.0 | -53.0 | -9395.551 | -34.294 | -47.155 | -31.723 | -29.073 | -36.465 | -20.95 | -36.863 | -262.529 | -53.792 | 155 | -48.476 | -29.077 | -73.814 | -454.636 | -23.778 | -37.64 | -61.98 | -27.913 | -250.494 | -1115.556 | -29.34 | -1.966 | -494.499 | -430.106 | -111.694 | -14.942 | -540.021 | -52.867 | -355.436 | -200.96 | -54.714 | -32.123 | -17.187 | -8.224 | -0.548 | 4.702 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -7.1 | -1.7 | -4.0 | -1.8 | -3.7 | -1.4 | -3.3 | -835.2 | -4.4 | -6.5 | -3.6 | -3.8 | -5.0 | -3.1 | -5.0 | -39.1 | -7.9 | 23.9 | -6.1 | -4.2 | -11.1 | -78.5 | -3.9 | -6.9 | -11.2 | -5.5 | -40.8 | -225.4 | -6.4 | -0.5 | -115.6 | -127.0 | -35.6 | -5.3 | -163.9 | -20.3 | -140.2 | -89.8 | -25.7 | -17.8 | -9.2 | -4.5 | -0.2 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -19.0 | 12 | -21.0 | -1.0 | -32.0 | -11.0 | -54.0 | -19.402 | -34.395 | -37.203 | -24.504 | -32.031 | -34.15 | -25.234 | 95 | -74.296 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 16.5 | -46.2 | 34.4 | 3.7 | 66.7 | 47.8 | 101.9 | 0.2 | 100.3 | 78.9 | 77.2 | 110.2 | 93.7 | 120.4 | -258.7 | 28.3 |
| Percentage of Revenues | -1.2 | 0.8 | -1.4 | -0.1 | -2.5 | -0.7 | -3.3 | -1.7 | -4.5 | -5.2 | -2.7 | -4.2 | -4.7 | -3.8 | 13.0 | -11.1 |
| Percentage of Revenues srt:GuarantorSubsidiaries srt:ReportableLegalEntities | -2.6 | 1.7 | -2.2 | -0.1 | -5.1 | -1.5 | -6.9 | -2.8 | -4.9 | -5.7 | -2.9 | -4.5 | -5.0 | -4.0 | 14.1 | -12.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -93.0 | -27.0 | -21.0 | 0.0 | -13.0 | -9.0 | 7.0 | -9353.231 | -1.955 | -1.814 | -1.368 | 5.187 | 0.038 | 7.052 | -147.594 | 122 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 80.9 | 103.8 | 34.4 | -0.0 | 27.1 | 39.1 | -13.2 | 99.5 | 5.7 | 3.8 | 4.3 | -17.8 | -0.1 | -33.7 | 400.4 | -46.6 |
| Percentage of Revenues | -5.8 | -1.8 | -1.4 | 0.0 | -1.0 | -0.6 | 0.4 | -831.4 | -0.3 | -0.3 | -0.2 | 0.7 | 0.0 | 1.1 | -20.1 | 18.2 |
| Percentage of Revenues srt:NonGuarantorSubsidiaries srt:ReportableLegalEntities | -10.5 | -3.3 | -3.5 | 0.0 | -1.9 | -1.0 | 0.8 | -2101.8 | -2.2 | -2.2 | -1.6 | 6.8 | 0.1 | 12.2 | -241.1 | 256.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | -4.0 | -2.0 | -41.0 | -1.0 | 0.0 | 0.0 | -4.0 | 0.299 | -0.399 | -1.9 | -0.82 | 2.197 | 1.094 | 1.339 | 2.694 | 1.623 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 3.5 | 7.7 | 67.2 | 3.7 | -0.0 | -0.0 | 7.5 | -0.0 | 1.2 | 4.0 | 2.6 | -7.6 | -3.0 | -6.4 | -7.3 | -0.6 |
| Percentage of Revenues | -0.2 | -0.1 | -2.7 | -0.1 | 0.0 | 0.0 | -0.2 | 0.0 | -0.1 | -0.3 | -0.1 | 0.3 | 0.1 | 0.2 | 0.4 | 0.2 |
| Percentage of Revenues srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 0.0 | -10.0 | 21 | -26.0 | -4.0 | -7.0 | -4.0 | -27.263 | -0.537 | -8.2 | -6.331 | -5.867 | -4.695 | -4.107 | 12 | -2.338 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | -0.0 | 38.5 | -34.4 | 96.3 | 8.3 | 30.4 | 7.5 | 0.3 | 1.6 | 17.4 | 20.0 | 20.2 | 12.9 | 19.6 | -33.2 | 0.9 |
| Percentage of Revenues | 0.0 | -0.7 | 1.4 | -1.7 | -0.3 | -0.4 | -0.2 | -2.4 | -0.1 | -1.1 | -0.7 | -0.8 | -0.6 | -0.6 | 1.7 | -0.3 |
| Percentage of Revenues srt:SubsidiaryIssuer srt:ReportableLegalEntities | 0.0 | -37.0 | 80.8 | -104.0 | -16.0 | -29.2 | -15.4 | -302.9 | 0.0 | -205000.0 | 105516.7 | -97783.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 4.0 | 2.0 | 4.046 | 2.992 | 1.962 | 0.958 | 1.441 | 1.248 | 0.0 | 1.699 | 0.997 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | -0.9 | -3.8 | -1.6 | -3.7 | -2.1 | -17.4 | -3.8 | -0.0 | -8.7 | -4.2 | -3.0 | -5.0 | -3.4 | -0.0 | -4.6 | -0.4 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.4 | 0.4 | 0.3 | 0.1 | 0.2 | 0.2 | 0.0 | 0.2 | 0.1 |
| Percentage of Revenues srt:ConsolidationEliminations | -2.2 | -2.6 | -2.0 | -2.2 | -2.5 | -8.5 | -3.8 | -13.1 | -13.3 | -11.3 | -3.3 | -5.8 | -5.7 | -0.0 | -7.5 | -5.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 18 | 20 | 27 | 33 | 51 | 46 | 60 | 34 | 32 | 29 | 27 | 25 | 30 | 22 | 28 | 21 | 12 | 20 | 25 | 18 | 23 | 25 | 18 | 25 | 23 | 23 | 23 | 31 | 14 | 11 | 14 | 11 | 9.684 | 7.482 | 13 | 11 | 11 | 6.736 | 9.041 | 6.138 | 14 | 6.085 | 1.896 | 5.136 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquip |