| 2021-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ███████▇▇▇▇▇▇▆▆▆▅▃▂▂▁▁▁▁▁ | 0.872 | 0.868 | 0.859 | 0.858 | 0.855 | 0.855 | 0.846 | 0.838 | 0.838 | 0.794 | 0.792 | 0.784 | 0.776 | 0.77 | 0.747 | 0.747 | 0.658 | 0.57 | 0.506 | 0.448 | 0.426 | 0.426 | 0.415 | 0.415 | 0.415 | NA | 0.001 | NA | NA | NA |
| us-gaap:SharesIssued us-gaap:StatementClassOfStock,us-gaap:StatementEquityComponents us-gaap:CommonClassA,us-gaap:CommonStock | ███████▇▇▇▇▇▇▆▆▆▅▃▃▂▁▁▁▁▁ | 87.195 | 86.779 | 85.895 | 85.757 | 85.457 | 85.45 | 84.589 | 83.826 | 83.815 | 79.429 | 79.172 | 78.392 | 77.578 | 76.979 | 74.723 | 74.658 | 65.765 | 57.026 | 52.587 | 45.029 | 42.669 | 42.565 | 41.491 | 41.475 | 41.462 | NA | 4.048 | NA | NA | NA |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | █▁ | 85.448 | 84.67 | NA | NA | 85.349 | 84.793 | NA | NA | NA | NA | NA | 77.999 | 77.209 | 75.375 | NA | 70.328 | 59.478 | 52.599 | NA | 43.11 | 42.594 | 42.185 | NA | 41.468 | 36.643 | 2.988 | NA | 2.506 | 2.272 | NA |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | █▁ | 85.448 | 84.67 | NA | NA | 85.349 | 84.793 | NA | NA | NA | NA | NA | 77.999 | 77.209 | 75.375 | NA | 70.328 | 59.478 | 52.599 | NA | 43.11 | 42.594 | 42.185 | NA | 41.468 | 13.976 | 2.988 | NA | 2.506 | 2.272 | NA |
| us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted | NA | NA | NA | 85.172 | 85.349 | 84.793 | NA | 83.819 | 82.289 | 79.335 | NA | 77.999 | 77.209 | 75.375 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | █▁ | 16.549 | 16.092 | NA | 12.193 | 11.626 | 11.532 | NA | 12.449 | 13.921 | 16.56 | NA | 9.862 | 9.592 | 10.131 | NA | 11.408 | 17.686 | 23.948 | NA | 20.754 | 19.036 | 0.469 | NA | 19.427 | 0.0 | 23.892 | NA | 22.59 | 23.382 | NA |
| us-gaap:EarningsPerShareBasic | █▁ | -0.11 | -0.12 | NA | NA | -2.38 | -0.93 | NA | -0.3 | -0.38 | -0.59 | NA | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 | -0.33 | -0.26 | -0.2 | -2.91 | -0.1 | -0.29 | 25.69 | -4.22 | -4.37 | -2.07 | -3.17 | -3.35 |
| us-gaap:EarningsPerShareDiluted | █▁ | -0.11 | -0.12 | NA | NA | -2.38 | -0.93 | NA | -0.3 | -0.38 | -0.59 | NA | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 | -0.33 | -0.26 | -0.2 | -2.91 | -0.1 | -0.29 | 9.73 | -4.22 | -4.37 | -2.07 | -3.17 | -3.35 |
| us-gaap:EarningsPerShareBasicAndDiluted | NA | NA | -0.17 | -0.44 | -2.38 | -0.93 | -2.36 | -0.3 | -0.38 | -0.59 | -0.21 | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:IncomeLossFromContinuingOperationsPerBasicShare | █▁ | -1.1e-07 | -1.3e-07 | NA | NA | -2.37e-06 | -9.300000000000001e-07 | 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:IncomeLossFromContinuingOperationsPerDilutedShare | █▁ | -1.1e-07 | -1.3e-07 | NA | NA | -2.37e-06 | -9.300000000000001e-07 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net profit Margin us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 71.154 | 501.211 | 575.793 | NA | 97.451 | 100.534 | 30.003 | 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:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 71.154 | 501.211 | 575.793 | NA | 97.451 | 100.534 | 30.003 | 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 |
|---|
| 2021-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AllocatedShareBasedCompensationExpense | ▄▄▄▃▄▄▁▅▅▄▅▄▅▄▄▅▅▅█▅▅▄▄▄▆ | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 0.573 | 5.758 | 4.75 | 4.537 | 5.049 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 8.657 | 4.799 | 4.709 | 4.436 | 4.194 | 4.382 | 6.154 | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTax | ███▇▁▅▁▇▇▇████████ | -9.165 | -9.838 | -14.583 | -37.277 | -203.525 | -78.905 | -198.115 | -25.589 | -31.604 | -46.715 | -16.605 | -12.545 | -10.064 | -13.626 | -13.159 | -12.588 | -16.905 | -18.012 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | NA | NA | NA | -0.822 | 0.0 | 0.0 | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | ███▇▁▅▁▇▇▇███████▇ | -9.165 | -9.838 | -13.761 | -38.099 | -203.525 | -78.905 | -199.312 | -25.806 | -31.889 | -48.625 | -17.458 | -12.671 | -10.179 | -14.065 | -13.79 | -13.129 | -19.698 | -23.149 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:GainsLossesOnExtinguishmentOfDebt | █▁█▆ | 0.0 | -19.158 | 0.0 | -4.789 | NA | NA | 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 us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:CreditAgreement,us-gaap:LineOfCredit | NA | NA | NA | NA | NA | NA | 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:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | ▃▃▃▃▁▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃█▃▃▄▃ | -9.016 | -10.579 | -14.225 | -37.667 | -207.425 | -78.482 | -220.882 | -26.587 | -30.502 | -49.145 | -17.529 | -12.42 | -10.14 | -14.062 | -18.418 | -14.843 | -20.398 | -22.744 | -34.334 | -16.031 | -12.37 | -174.9 | -13.961 | -17.192 | 385.761 | -11.319 | -10.698 | -3.167 | -5.939 | NA |
| us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | █▁ | -9.107 | -11.19 | NA | NA | -202.013 | -78.487 | 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 | ▄▄▄▄▃▄▁▄▄▄▄▄▄▄▃▄▄▄▃▄▄▄▃▄█▄▄▄▄ | 0.091 | 0.611 | -0.422 | 0.503 | -3.904 | 0.27 | -21.589 | -0.849 | 1.398 | -0.496 | 0.011 | 0.135 | -0.109 | 0.003 | -4.637 | -1.7 | -0.7 | 0.4 | -9.155 | -0.256 | -0.371 | -0.988 | -5.694 | -0.104 | 29.273 | 0.0 | 0.0 | 0.0 | 0.0 | NA |
| us-gaap:InterestExpense | ▆▆█▇▆▆▄▄▄▄▃▂▂▂▂▂▂▂▁▁▁▁ | 6.274 | 6.337 | 8.34 | 7.419 | 6.293 | 6.285 | 3.722 | 3.63 | 3.62 | 3.562 | 2.923 | 0.853 | 0.855 | 0.853 | 0.855 | 0.88 | 0.947 | 0.954 | 0.247 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:ConvertibleSeniorNotesdue2021,us-gaap:SeniorNotes | ▂▁▂▄██████ | 0.2 | 0.1 | 0.2 | 0.3 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | NA | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:SeniorConvertibleNotesDue2024,us-gaap:SeniorNotes | ███▁ | 1.0 | 1.0 | 1.0 | 0.5 | NA | NA | 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:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:SeniorConvertibleNotesDue2025,us-gaap:SeniorNotes | ▂▁█▁▂ | 0.7 | 0.6 | 2.0 | 0.6 | 0.7 | NA | 0.7 | 0.6 | 0.7 | 0.6 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:InterestPaidNet us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:CreditAgreement,us-gaap:LineOfCredit | NA | NA | NA | NA | NA | NA | 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:InterestPaidNet us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:SeniorCreditFacilities,us-gaap:SecuredDebt | NA | NA | NA | NA | NA | NA | 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:InterestPaidNet us-gaap:DebtInstrument,us-gaap:SubsequentEventType evh:CreditAgreement,us-gaap:SubsequentEvent | NA | NA | NA | NA | NA | NA | 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 | NA | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.16 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359.912 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 | |
| us-gaap:NetIncomeLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 0.957 | 11.123 | -25.327 | NA | 14.729 | 8.272 | -0.075 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:NetIncomeLossAttributableToNoncontrollingInterest | NA | NA | 0.822 | -0.822 | 0.0 | 0.0 | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 | -7.786 | -4.567 | -3.612 | -51.1 | -4.148 | -5.108 | -3.424 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | NA | 0.822 | 0.0 | 0.0 | 6.021 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 | -7.786 | -4.567 | -3.612 | -51.1 | -4.148 | -5.108 | -3.424 | NA | NA | NA | NA | NA | |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic | ▄ | -9.107 | NA | NA | NA | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359.018 | -12.609 | -11.994 | -5.196 | -7.21 | NA |
| us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted | ▄ | -9.107 | NA | NA | NA | -203.521 | NA | NA | NA | NA | NA | NA | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -8.267 | -11.98 | 356.488 | -12.609 | -11.994 | -5.196 | -7.21 | NA |
| us-gaap:OperatingExpenses | ▄▄▅▅█▅█▅▄▅▄▃▃▃▃▃▃▃▃▂▂▄▂▂▁▁▁▁▁▁ | 229.728 | 231.016 | 276.659 | 282.301 | 466.101 | 272.785 | 451.12 | 240.281 | 217.192 | 244.402 | 206.456 | 160.977 | 153.264 | 153.846 | 131.977 | 121.932 | 126.188 | 127.693 | 121.884 | 76.049 | 69.147 | 224.628 | 60.245 | 57.652 | 21.953 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| us-gaap:OperatingIncomeLoss | ███▇▁▇▁▇▇▇████▇█▇▇▇██▃█▇█████ | -7.671 | -15.945 | 0.053 | -17.708 | -227.469 | -25.5 | -214.595 | -20.138 | -25.233 | -46.646 | -13.352 | -11.03 | -8.966 | -14.132 | -18.247 | -14.02 | -19.117 | -21.455 | -33.873 | -15.839 | -12.629 | -175.179 | -14.187 | -17.246 | -11.539 | 0.0 | 0.0 | 0.0 | 0.0 | NA |
| us-gaap:OperatingIncomeLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 6.081 | 19.887 | -40.065 | NA | 48.251 | 6.447 | -0.254 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | ▄▅▇█▆▁▅▄▆▇█▂▁▆▆▆▆▆ | -0.058 | -0.031 | 0.042 | 0.071 | -0.004 | -0.153 | -0.019 | -0.068 | 0.011 | 0.024 | 0.064 | -0.116 | -0.148 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest | ▄▅▇█▅▁▅▄▆▆█▂▁▆ | -0.058 | -0.031 | 0.042 | 0.071 | -0.004 | -0.153 | -0.019 | -0.068 | 0.011 | 0.024 | 0.082 | -0.116 | -0.148 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:Parent | ▄▅▇█▆▁ | -0.058 | -0.031 | 0.042 | 0.071 | -0.004 | -0.153 | 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:OtherNonoperatingIncomeExpense | ▅▅▃▄▇▅▃▄▁█▆▄▆▅▆▅▅▅▅▅▅▅ | -0.018 | -0.014 | -0.289 | -0.111 | 0.352 | -0.071 | -0.248 | -0.084 | -0.587 | 0.427 | 0.173 | -0.124 | 0.078 | -0.018 | 0.15 | 0.015 | 0.003 | 0.002 | 0.0 | 0.001 | 0.001 | 0.0 | NA | 0.0 | 0.0 | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss | ▃▃▃▃▁▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▃▃█▃▃▄▃▃ | -9.107 | -9.807 | -13.803 | -38.17 | -203.521 | -78.752 | -199.293 | -25.738 | -31.9 | -48.649 | -17.54 | -12.555 | -10.031 | -14.065 | -13.791 | -13.129 | -19.698 | -23.149 | -25.193 | -15.775 | -11.999 | -173.912 | -8.267 | -17.088 | 356.488 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| us-gaap:ProfitLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 6.08 | 14.957 | -39.263 | NA | 53.142 | 8.358 | -0.34 | 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:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | NA | -0.822 | NA | NA | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent | ███▇▁▅ | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | 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:StatementEquityComponents us-gaap:RetainedEarnings | ███▇▁▅▁▇▇▇████████ | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.906 | -18.012 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | ▇▇██▇▇▇▇▆▆▆▅▅▅▄▄▄▄▃▃▂▂▂▂▁▁▁▁▁▁ | 222.057 | 215.071 | 271.923 | 264.593 | 238.632 | 247.285 | 236.525 | 220.143 | 191.959 | 197.756 | 193.104 | 149.947 | 144.298 | 139.714 | 113.729 | 107.912 | 107.071 | 106.238 | 88.011 | 60.21 | 56.518 | 49.449 | 46.058 | 40.406 | 10.414 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| us-gaap:Revenues | ▇▇██▇▇▇▇▆▆▆▅▅▅▄▄▄▄▃▃▂▂▂▂▁▁▁▁▁▁ | 222.057 | 215.071 | 271.923 | 264.593 | 217.299 | 221.232 | 236.525 | 220.143 | 191.959 | 197.756 | 193.104 | 149.947 | 144.298 | 139.714 | 113.729 | 107.912 | 107.071 | 106.238 | 88.011 | 60.21 | 56.518 | 49.449 | 46.058 | 40.406 | 10.414 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| us-gaap:SellingGeneralAndAdministrativeExpense | ▅▆▇▆▆▆▆▇▇█▇▇▆▆▆▅▆▆▆▅▄▄▄▄▂▁▁▁▁ | 42.699 | 58.591 | 61.633 | 55.758 | 50.511 | 54.698 | 56.468 | 58.808 | 66.932 | 74.838 | 62.923 | 59.566 | 57.403 | 55.526 | 55.196 | 45.834 | 51.09 | 53.55 | 57.591 | 38.398 | 32.756 | 32.095 | 32.37 | 29.834 | 13.082 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
|---|
| 2021-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | ▅▅▅▅▄▆▆█▇▇█▅▅▅▅▅▃▃▄▁▁▁▂▃▃ | 1293.367 | 1305.584 | 1370.185 | 1391.789 | 1270.134 | 1450.754 | 1498.015 | 1713.901 | 1652.256 | 1629.374 | 1722.281 | 1322.676 | 1321.62 | 1306.31 | 1312.697 | 1299.03 | 1138.352 | 1154.446 | 1199.839 | 851.28 | 852.801 | 856.463 | 1015.514 | 1056.181 | 1039.837 | NA | 38.277 | NA | NA | NA |
| us-gaap:Liabilities | ▇▇██▇▆▆▆▅▅▆▃▃▃▃▃▃▃▃▁▁▁▁▁▁ | 679.177 | 688.286 | 750.585 | 737.044 | 623.27 | 603.682 | 568.968 | 589.553 | 505.5 | 479.248 | 532.925 | 274.103 | 270.239 | 251.396 | 266.391 | 243.251 | 243.903 | 257.706 | 287.725 | 91.423 | 84.657 | 80.801 | 80.935 | 120.129 | 91.133 | NA | 1.074 | NA | NA | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | ▅▅▅▅▄▆▆█▇▇█▅▅▅▅▅▃▃▄▁▁▁▂▃▃ | 1293.367 | 1305.584 | 1370.185 | 1391.789 | 1270.134 | 1450.754 | 1498.015 | 1713.901 | 1652.256 | 1629.374 | 1722.281 | 1322.676 | 1321.62 | 1306.31 | 1312.697 | 1299.03 | 1138.352 | 1154.446 | 1199.839 | 851.28 | 852.801 | 856.463 | 1015.514 | 1056.181 | 1039.837 | NA | 38.277 | NA | NA | NA |
| us-gaap:StockholdersEquity | ▂▂▂▂▂▅▅██▇█▇▇▇▆▇▅▃▃▁▁▁▂▂▂ | 614.19 | 617.298 | 619.6 | 629.818 | 646.864 | 847.072 | 922.358 | 1108.46 | 1130.678 | 1100.026 | 1143.824 | 1038.565 | 1041.233 | 1043.142 | 1010.879 | 1019.847 | 859.769 | 750.471 | 702.526 | 562.228 | 537.728 | 541.524 | 649.341 | 646.666 | 654.21 | NA | -2.07 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsCurrent | ▇▇██▃▃▂▄▂▄▇▄▄▄▅▄▁▂▃▁▁▁▁▂▃ | 505.552 | 508.31 | 546.134 | 548.545 | 274.658 | 258.473 | 228.801 | 308.012 | 240.864 | 321.186 | 487.966 | 348.591 | 353.254 | 337.279 | 378.182 | 352.329 | 192.62 | 217.538 | 264.966 | 191.429 | 170.557 | 167.566 | 184.463 | 246.221 | 251.64 | NA | 1.074 | NA | NA | NA |
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▅▅▇█▃▂▃▃▃▄▅▅▅▅▆▆▃▃▄▃▃▃▄▅▅▁▁▁▁ | 207.273 | 236.032 | 340.49 | 370.514 | 98.272 | 67.944 | 101.008 | 96.734 | 92.821 | 170.8 | 228.32 | 221.8 | 197.983 | 200.3 | 238.433 | 287.143 | 99.975 | 104.295 | 134.563 | 109.777 | 105.138 | 111.292 | 145.726 | 208.157 | 219.367 | 0.0 | 0.0 | 0.0 | 0.0 | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | ▄▆▇█▂▁▁▃▂▄█▅▄▄▅▅▁▁▂ | 238.41 | 303.769 | 361.581 | 400.551 | 153.21 | 129.798 | 128.531 | 205.753 | 137.167 | 227.454 | 388.325 | 266.847 | 254.325 | 236.362 | 295.363 | 295.925 | 113.944 | 131.26 | 170.029 | NA | NA | NA | 152.011 | NA | NA | NA | 0.0 | NA | NA | NA |
| us-gaap:AccountsReceivableNetCurrent | █▆▄▃▃▄▃▃▃▂▃▂▃▂▂▂▂▂▂▁▁▁▁▁▁ | 242.505 | 185.103 | 125.986 | 95.317 | 95.839 | 107.506 | 75.667 | 74.874 | 71.379 | 65.626 | 80.208 | 60.054 | 70.846 | 66.138 | 48.947 | 43.972 | 45.804 | 44.638 | 40.635 | 21.986 | 30.337 | 25.216 | 20.381 | 30.541 | 24.039 | NA | 0.0 | NA | NA | NA |
| us-gaap:PrepaidExpenseAndOtherAssetsCurrent | ▅▅█▇▄▄▄▄▅▄▃▂▃▃▂▃▂▂▂▁▁▁▁▁▁ | 38.032 | 33.696 | 61.034 | 55.381 | 30.473 | 25.449 | 28.488 | 29.749 | 32.81 | 30.495 | 22.618 | 14.667 | 15.757 | 17.369 | 8.404 | 16.144 | 12.556 | 11.667 | 11.011 | 4.983 | 5.3 | 4.215 | 4.208 | 3.52 | 3.179 | NA | 0.0 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 3.859 | 3.909 | 4.612 | NA | 43.744 | 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 | ███▇▇▆▆▆▅▅▅▄▄▄▃▃▃▂▂▂▁▁▁▁▁ | 187.2 | 181.123 | 175.096 | 170.451 | 157.389 | 147.58 | 140.169 | 131.805 | 122.854 | 114.371 | 105.366 | 94.957 | 86.585 | 78.453 | 65.38 | 58.209 | 49.139 | 42.476 | 36.415 | 24.77 | 21.191 | 17.472 | 14.029 | 11.456 | 8.617 | NA | 0.0 | NA | NA | NA |
| us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | █▇▇▇▆▅▅▄▄▃▃▃▂▂▂▂▂▁▁▁▁▁▁ | 104.204 | 96.684 | 88.856 | 82.379 | 68.834 | 61.772 | 55.014 | 48.641 | 42.637 | 36.992 | 31.738 | 26.265 | 21.955 | 18.023 | 14.458 | 11.279 | 8.945 | 7.017 | 5.236 | 3.647 | 2.723 | 1.935 | 1.233 | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:AmortizationOfIntangibleAssets | ▆▆▆▆▇██████▅▅▅▇▅▅▄▄▃▃▃▃▃▂▁ | 7.2 | 7.5 | 7.5 | 7.4 | 8.7 | 9.3 | 9.6 | 9.4 | 9.6 | 9.1 | 9.2 | 6.1 | 6.0 | 5.9 | 7.8 | 5.3 | 4.9 | 4.8 | 4.6 | 2.7 | 2.6 | 2.6 | 2.5 | 2.5 | 0.8 | 0.0 | NA | NA | NA | NA |
| us-gaap:PropertyPlantAndEquipmentNet | ████████▇▇▇▆▆▆▅▄▄▃▃▂▂▂▁▁▁ | 82.996 | 84.439 | 86.24 | 88.072 | 88.555 | 85.808 | 85.155 | 83.164 | 80.217 | 77.379 | 73.628 | 68.692 | 64.63 | 60.43 | 50.922 | 46.93 | 40.194 | 35.459 | 31.179 | 21.123 | 18.468 | 15.537 | 12.796 | 10.755 | 8.463 | NA | 0.0 | NA | NA | NA |
| us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | ▂▁▁▁▇▅█▄▄▁▁▁▁▁▁▁▁▁▁▁▁ | 9.788 | 4.909 | 6.498 | 7.473 | 100.216 | 75.074 | 122.618 | 55.528 | 59.167 | 6.188 | 6.276 | 5.672 | 4.246 | 5.521 | 1.531 | 0.712 | 1.081 | 1.636 | 2.159 | 2.538 | 2.986 | NA | 0.0 | 0.0 | 0.0 | NA | 37.203 | NA | NA | NA |
| us-gaap:Goodwill | ▁▁▁▁▁▅▅████▆▆▆▆▆▆▆▆▃▃▃▅▅▅ | 349.009 | 349.022 | 354.734 | 354.722 | 354.695 | 569.797 | 572.064 | 771.887 | 772.164 | 770.334 | 768.124 | 635.088 | 635.282 | 635.246 | 628.186 | 628.341 | 628.653 | 627.204 | 626.569 | 459.703 | 459.703 | 459.703 | 608.903 | 608.903 | 608.903 | NA | 0.0 | NA | NA | NA |
| us-gaap:IntangibleAssetsNetExcludingGoodwill | ▅▅▅▆▆▆▇▇███▄▄▄▄▄▅▅▅▁▁▁▁▁▁ | 252.045 | 259.42 | 268.072 | 275.492 | 282.913 | 291.627 | 308.459 | 317.2 | 326.586 | 336.231 | 335.036 | 230.806 | 236.819 | 242.863 | 241.261 | 249.492 | 254.46 | 254.166 | 258.923 | 162.789 | 165.442 | 168.072 | 163.152 | 165.661 | 168.17 | NA | 0.0 | NA | NA | NA |
| us-gaap:FiniteLivedIntangibleAssetsNet | ▅▅▅▆▆▆▇▇███▄▄▄▄▄▅▅▅▁▁▁▁▁▁ | 252.045 | 259.42 | 268.072 | 275.492 | 282.913 | 291.627 | 308.459 | 317.2 | 326.586 | 336.231 | 335.036 | 230.806 | 236.819 | 242.863 | 241.261 | 249.492 | 254.46 | 254.166 | 258.923 | 162.789 | 165.442 | 168.072 | 163.152 | 165.661 | 168.17 | NA | 0.0 | NA | NA | NA |
| us-gaap:OperatingLeaseRightOfUseAsset | ▆▆▆▆▇▇███▇▁ | 51.904 | 53.686 | 57.799 | 60.24 | 66.113 | 63.038 | 72.173 | 75.768 | 76.712 | 63.855 | 0.0 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AccountsPayableCurrent | ▂▄▂▂▄▅▂▇▂▂█▂▂▂▃▂▂▂▃▁▁▁▁▁▁ | 39.879 | 78.574 | 32.068 | 32.177 | 73.691 | 80.035 | 37.488 | 120.024 | 28.758 | 39.007 | 146.76 | 30.535 | 34.258 | 22.445 | 42.93 | 27.292 | 26.28 | 39.613 | 43.892 | 14.486 | 12.375 | 17.042 | 16.699 | 12.642 | 13.53 | NA | 0.0 | NA | NA | NA |
| us-gaap:AccruedLiabilitiesCurrent | ▅▆█▇▄▃▃▄▅▅▅▅▄▄▃▂▃▂▃▂▁▁▁▂▂ | 52.339 | 61.069 | 84.507 | 76.979 | 35.305 | 28.203 | 33.343 | 41.632 | 52.631 | 53.018 | 48.957 | 47.189 | 39.477 | 37.955 | 29.572 | 21.094 | 25.919 | 22.32 | 29.16 | 11.839 | 8.513 | 7.551 | 6.047 | 21.682 | 20.091 | NA | 0.0 | NA | NA | NA |
| us-gaap:ContractWithCustomerLiabilityCurrent | ▁▁▂▁▁▃▄▅▇▅▄▅█ | 13.173 | 13.367 | 14.327 | 12.459 | 13.247 | 17.023 | 19.828 | 22.701 | 26.923 | 22.32 | 20.584 | 22.36 | 29.818 | NA | 24.807 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LiabilitiesCurrent | ███▇▅▅▄▅▃▃▅▃▃▂▃▂▂▂▃▁▁▁▁▂▁ | 403.268 | 414.508 | 401.779 | 365.496 | 245.122 | 236.251 | 192.769 | 259.851 | 172.873 | 163.675 | 269.356 | 139.411 | 136.187 | 116.935 | 132.699 | 105.467 | 101.76 | 104.439 | 131.941 | 65.329 | 56.727 | 52.545 | 59.506 | 89.838 | 60.806 | NA | 0.0 | NA | NA | NA |
| us-gaap:LongTermDebtCurrent | █▅▁ | 26.655 | 26.606 | 26.557 | NA | NA | NA | 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 | ▇█▇██▁▃ | 7.265 | 7.539 | 7.357 | 7.438 | 7.474 | 5.785 | 6.269 | NA | NA | NA | 0.0 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 20.693 | 17.008 | 16.894 | NA | 57.599 | 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 | NA | 285.213 | 299.746 | 296.676 | 293.667 | 227.996 | 225.642 | 223.32 | 221.041 | 122.082 | 121.853 | 121.623 | 121.394 | 121.164 | 120.935 | 120.706 | 120.283 | NA | NA | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType evh:SeniorConvertibleNotesDue2024,us-gaap:SeniorNotes | NA | NA | NA | NA | NA | NA | 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 us-gaap:LongtermDebtType,us-gaap:RelatedPartyTransactionsByRelatedParty us-gaap:LineOfCredit,us-gaap:EquityMethodInvestee | NA | NA | NA | 1.4 | 1.4 | 1.4 | 1.0 | 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:LongTermDebtNoncurrent | ▂▁█ | 206.55 | 202.132 | 263.343 | NA | NA | NA | 293.667 | 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:DeferredIncomeTaxLiabilitiesNet | ▁▁▁▁▁▁▁████▁▁ | 0.957 | 1.085 | 0.728 | 1.39 | 1.326 | 2.13 | 1.942 | 24.593 | 25.766 | 24.566 | 25.438 | 1.725 | 1.533 | NA | 2.437 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:MinorityInterest | NA | NA | NA | 24.927 | 0.0 | 0.0 | 6.689 | 15.888 | 16.078 | 50.1 | 45.532 | 10.008 | 10.148 | 11.772 | 35.427 | 35.932 | 34.68 | 146.269 | 209.588 | 197.629 | 230.416 | 234.138 | 285.238 | 289.386 | 294.494 | NA | 0.0 | NA | NA | NA | |
| us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 2.671 | 3.638 | 97.315 | NA | 70.535 | 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:MinorityInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | NA | 24.927 | 0.0 | 0.0 | 6.689 | 15.888 | 16.078 | 50.1 | 45.532 | 10.008 | 10.148 | 11.772 | 35.427 | 35.932 | 34.68 | 146.269 | 209.588 | 197.629 | 230.416 | 234.138 | 285.238 | 289.386 | 294.494 | 0.0 | 0.0 | NA | NA | NA | |
| us-gaap:OtherLiabilitiesNoncurrent | ▄▄█▇▄▃▅▃▄▄▆▄▄▅▄▄▄▅▆▄▃▃▁▁ | 9.784 | 10.269 | 22.209 | 20.207 | 10.101 | 7.664 | 11.732 | 6.553 | 10.423 | 10.49 | 17.09 | 10.885 | 10.666 | 11.368 | 9.861 | 9.982 | 10.024 | 14.091 | 14.655 | 7.997 | 7.972 | 7.927 | 0.111 | 0.067 | NA | NA | 0.0 | NA | NA | NA |
| us-gaap:OperatingLeaseLiabilityNoncurrent | ▁▂▄▅▇▃█ | 58.618 | 60.292 | 62.526 | 64.738 | 66.975 | 60.961 | 68.858 | NA | NA | NA | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | ▁▁▇█ | 8.645 | 8.65 | 9.562 | 9.647 | NA | NA | 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 | ▁▁▇█ | 8.378 | 8.378 | 9.012 | 9.105 | NA | NA | 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 | ▁▁▇█ | 8.145 | 8.145 | 8.733 | 8.833 | NA | NA | 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 | 8.265 | NA | NA | NA | 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 | 47.759 | NA | NA | NA | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquity | ▂▂▂▂▂▅▅██▇█▇▇▇▆▇▅▃▃▁▁▁▂▂▂ | 614.19 | 617.298 | 619.6 | 629.818 | 646.864 | 847.072 | 922.358 | 1108.46 | 1130.678 | 1100.026 | 1143.824 | 1038.565 | 1041.233 | 1043.142 | 1010.879 | 1019.847 | 859.769 | 750.471 | 702.526 | 562.228 | 537.728 | 541.524 | 649.341 | 646.666 | 654.21 | NA | -2.07 | NA | NA | NA |
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | ▁▁▁▁▁▄▅▇▇██▆▆▆▆▆▄▄▅▃▃▃▅▅▅ | 614.19 | 617.298 | 619.6 | 654.745 | 646.864 | 847.072 | 929.047 | 1124.348 | 1146.756 | 1150.126 | 1189.356 | 1048.573 | 1051.381 | 1054.914 | 1046.306 | 1055.779 | 894.449 | 896.74 | 912.114 | 759.857 | 768.144 | 775.662 | 934.579 | 936.052 | 948.704 | NA | -2.07 | NA | NA | NA |
| us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA | ███████▇▇▇▇▇▇▆▆▆▅▃▂▂▁▁▁▁▁ | 0.872 | 0.868 | 0.859 | 0.858 | 0.855 | 0.855 | 0.846 | 0.838 | 0.838 | 0.794 | 0.792 | 0.784 | 0.776 | 0.77 | 0.747 | 0.747 | 0.658 | 0.57 | 0.506 | 0.448 | 0.426 | 0.426 | 0.415 | 0.415 | 0.415 | NA | 0.001 | NA | NA | NA |
| us-gaap:AdditionalPaidInCapital | ██████▇▇▇▇▇▆▆▆▆▆▄▃▃▂▁▁▁▁▁ | 1242.9 | 1236.847 | 1229.32 | 1224.956 | 1183.605 | 1180.288 | 1173.708 | 1161.696 | 1158.325 | 1096.089 | 1093.174 | 971.341 | 961.472 | 953.322 | 924.153 | 919.962 | 747.385 | 621.187 | 555.25 | 397.603 | 361.895 | 357.047 | 342.063 | 335.269 | 330.833 | NA | 23.733 | NA | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit | ▁▁▁▁▂▃▄▅▅▆▆▆▆▆▆▆▆▇▇▇▇▇███ | -608.092 | -598.985 | -589.178 | -574.553 | -537.205 | -333.684 | -251.962 | -53.866 | -28.345 | 3.27 | 50.009 | 66.696 | 79.125 | 89.041 | 85.952 | 99.111 | 111.699 | 128.605 | 146.617 | 164.024 | 175.232 | 183.876 | 306.688 | 310.807 | 322.787 | NA | -25.806 | NA | NA | NA |
| us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax | ▁▂▃▂▁▁▄▄▅▅▅▃▅██ | -0.367 | -0.309 | -0.278 | -0.32 | -0.391 | -0.387 | -0.234 | -0.215 | -0.147 | -0.158 | -0.182 | -0.264 | -0.148 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:MinorityInterest | NA | NA | NA | 24.927 | 0.0 | 0.0 | 6.689 | 15.888 | 16.078 | 50.1 | 45.532 | 10.008 | 10.148 | 11.772 | 35.427 | 35.932 | 34.68 | 146.269 | 209.588 | 197.629 | 230.416 | 234.138 | 285.238 | 289.386 | 294.494 | NA | 0.0 | NA | NA | NA | |
| us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 2.671 | 3.638 | 97.315 | NA | 70.535 | 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:MinorityInterest us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | NA | 24.927 | 0.0 | 0.0 | 6.689 | 15.888 | 16.078 | 50.1 | 45.532 | 10.008 | 10.148 | 11.772 | 35.427 | 35.932 | 34.68 | 146.269 | 209.588 | 197.629 | 230.416 | 234.138 | 285.238 | 289.386 | 294.494 | 0.0 | 0.0 | NA | NA | NA | |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | ▄▄▅▃▄▃▅▃▅▅▆▅▆▄▅█▇▇▁▆▆▅▅▅ | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 4.139 | 3.352 | 4.362 | 4.152 | 4.661 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 2.303 | 4.799 | 4.609 | 4.436 | 4.194 | 4.382 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▃▁▄▃█▃▆▄▄▃▃▇▅▃▅▆▄▂▃▆▅▃▄▄▄▅▅▅ | -24.247 | -48.163 | -12.851 | -20.499 | 37.666 | -20.541 | 13.187 | -16.59 | -13.533 | -25.709 | -24.968 | 22.321 | 6.701 | -24.705 | 6.035 | 10.719 | -9.947 | -34.765 | -21.505 | 7.913 | -1.114 | -20.804 | -6.311 | -6.349 | -5.808 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▃▄▃█▃▃▂▃▂▃▁▃▃▃▃▃▃▃▂▃▃▃▂▃▄▃▃▃ | -5.571 | 45.951 | -2.225 | 281.679 | -7.575 | -10.807 | -79.174 | -11.644 | -65.338 | -25.478 | -135.442 | -5.557 | -6.691 | -12.685 | -29.268 | 9.264 | 3.117 | 4.622 | -74.974 | -4.357 | -4.811 | -13.655 | -54.819 | -4.915 | 16.05 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▂▃▃▃▄▃▅▃▁█▃▃▃▃▆▃▃▅▃▃▃▃▃▇▃▃▃ | -35.503 | -55.584 | -23.916 | -13.856 | -6.664 | 32.574 | -11.246 | 96.772 | -11.406 | -109.665 | 281.959 | -4.27 | 17.942 | -21.607 | -4.013 | 167.185 | 2.51 | -0.125 | 121.265 | 1.083 | -0.229 | 0.025 | -1.301 | 0.054 | 209.125 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | ▃▃▃█▄▄▂▅▂▁▆▄▄▃▄▇▃▃ | -65.376 | -57.795 | -38.97 | 247.341 | 23.412 | 1.267 | -77.222 | 68.586 | -90.287 | -160.871 | 121.478 | 12.522 | 17.963 | -59.001 | -0.562 | 181.981 | -17.316 | -38.769 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AmortizationOfFinancingCosts | ███▇▆▅▅▅▄▄▄▁▁▁▁▁▁▁▁▁▁▁ | 4.467 | 4.37 | 4.687 | 4.014 | 3.07 | 3.009 | 2.416 | 2.354 | 2.321 | 2.279 | 1.767 | 0.229 | 0.23 | 0.229 | 0.229 | 0.229 | 0.227 | 0.229 | 0.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:DepreciationDepletionAndAmortization | ▇█▇▇█████▇▇▅▅▅▆▄▄▄▄▃▃▂▂▂▁▁▁▁ | 14.916 | 15.347 | 14.865 | 14.694 | 15.778 | 16.138 | 15.947 | 15.408 | 15.292 | 14.266 | 14.633 | 10.352 | 10.034 | 9.496 | 11.132 | 7.717 | 6.904 | 6.615 | 6.496 | 3.745 | 3.612 | 3.371 | 3.126 | 3.056 | 0.984 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:IncreaseDecreaseInAccountsPayable | ▄▇▅▁▅▇▄▃▅▄▅▆▄▅▃█▂▆▄▄▄▄▅▅▄▄▄▄ | 0.509 | 9.395 | 3.941 | -12.084 | 0.622 | 11.068 | -1.487 | -5.018 | 1.229 | -0.204 | 1.147 | 6.793 | -2.676 | 2.334 | -5.028 | 13.105 | -6.736 | 4.222 | -2.679 | -0.717 | -0.079 | -2.896 | 1.691 | 2.186 | -1.113 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▃▁▄▃█▃▆▄▄▃▃▇▅▃▅▆▄▂▃▆▅▃▄▄▄▅▅▅ | -24.247 | -48.163 | -12.851 | -20.499 | 37.666 | -20.541 | 13.187 | -16.59 | -13.533 | -25.709 | -24.968 | 22.321 | 6.701 | -24.705 | 6.035 | 10.719 | -9.947 | -34.765 | -21.505 | 7.913 | -1.114 | -20.804 | -6.311 | -6.349 | -5.808 | 0.0 | 0.0 | 0.0 | NA | NA |
| us-gaap:NetIncomeLoss | NA | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.16 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359.912 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 | |
| us-gaap:NetIncomeLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 0.957 | 11.123 | -25.327 | NA | 14.729 | 8.272 | -0.075 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:ProfitLoss | ▃▃▃▃▁▃▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▃▃█▃▃▄▃▃ | -9.107 | -9.807 | -13.803 | -38.17 | -203.521 | -78.752 | -199.293 | -25.738 | -31.9 | -48.649 | -17.54 | -12.555 | -10.031 | -14.065 | -13.791 | -13.129 | -19.698 | -23.149 | -25.193 | -15.775 | -11.999 | -173.912 | -8.267 | -17.088 | 356.488 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| us-gaap:ProfitLoss us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | NA | NA | 6.08 | 14.957 | -39.263 | NA | 53.142 | 8.358 | -0.34 | 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:StatementEquityComponents us-gaap:NoncontrollingInterest | NA | NA | NA | -0.822 | NA | NA | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent | ███▇▁▅ | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | 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:StatementEquityComponents us-gaap:RetainedEarnings | ███▇▁▅▁▇▇▇████████ | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.906 | -18.012 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ShareBasedCompensation | ▅▅▆▅▅▅▂█▆▆▇▆▆▅▆▇▇▇▆▆▇▆▆▆█▁▁▁ | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 0.573 | 5.758 | 4.75 | 4.537 | 5.049 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 4.76 | 4.331 | 5.077 | 4.436 | 4.194 | 4.382 | 6.154 | 0.0 | 0.0 | 0.0 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▃▄▃█▃▃▂▃▂▃▁▃▃▃▃▃▃▃▂▃▃▃▂▃▄▃▃▃ | -5.571 | 45.951 | -2.225 | 281.679 | -7.575 | -10.807 | -79.174 | -11.644 | -65.338 | -25.478 | -135.442 | -5.557 | -6.691 | -12.685 | -29.268 | 9.264 | 3.117 | 4.622 | -74.974 | -4.357 | -4.811 | -13.655 | -54.819 | -4.915 | 16.05 | 0.0 | 0.0 | 0.0 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▂▃▃▃▄▃▅▃▁█▃▃▃▃▆▃▃▅▃▃▃▃▃▇▃▃▃ | -35.503 | -55.584 | -23.916 | -13.856 | -6.664 | 32.574 | -11.246 | 96.772 | -11.406 | -109.665 | 281.959 | -4.27 | 17.942 | -21.607 | -4.013 | 167.185 | 2.51 | -0.125 | 121.265 | 1.083 | -0.229 | 0.025 | -1.301 | 0.054 | 209.125 | 0.0 | 0.0 | 0.0 | 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 |
|---|
| 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 | 2014-12-31 |
| Value | 872000.0 | 868000.0 | 859000.0 | 858000.0 | 855000.0 | 855000.0 | 846000.0 | 838000.0 | 838000.0 | 794000.0 | 792000.0 | 784000.0 | 776000.0 | 770000.0 | 747000.0 | 747000.0 | 658000.0 | 570000.0 | 506000.0 | 448000.0 | 426000.0 | 426000.0 | 415000.0 | 415000.0 | 415000.0 | 1000.0 |
| 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 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 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 |
| 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 87 | 86 | 85 | 85 | 85 | 85 | 84 | 83 | 83 | 79 | 79 | 78 | 77 | 76 | 74 | 74 | 65 | 57 | 52 | 45 | 42 | 42 | 41 | 41 | 41 | 4.048 | 3.824 | 3.772 |
| Percentage of SharesIssued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 |
| Value | 85 | 84 | 85 | 84 | 77 | 77 | 75 | 70 | 59 | 52 | 43 | 42 | 42 | 41 | 36 | 2.988 | 2.506 | 2.272 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 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 |
| Value | 85 | 84 | 85 | 84 | 77 | 77 | 75 | 70 | 59 | 52 | 43 | 42 | 42 | 41 | 13 | 2.988 | 2.506 | 2.272 |
| 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 |
| Period End | 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 |
| Value | 85 | 85 | 84 | 83 | 82 | 79 | 77 | 77 | 75 |
| Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 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 |
| Value | 16 | 16 | 12 | 11 | 11 | 12 | 13 | 16 | 9.862 | 9.592 | 10 | 11 | 17 | 23 | 20 | 19 | 0.469 | 19 | 0.0 | 23 | 22 | 23 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 |
| Value | 2.052 | 1.531 | 1.042 | 0.554 | 0.199 | 0.548 | 0.985 | 1.043 | 1.197 | 0.938 | 0.627 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 12.4 | 9.5 | 8.5 | 4.8 | 1.7 | 4.4 | 7.1 | 6.3 | 12.1 | 9.8 | 6.2 |
| 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 |
| Value | 12 | 12 | 9.789 | 10 | 10 | 10 | 10 | 10 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 76.7 | 78.9 | 80.3 | 89.1 | 89.8 | 83.2 | 74.4 | 62.6 |
| 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 | 1.801 | 1.865 | 1.362 | 0.711 | 0.972 | 0.834 | 1.495 | 1.966 |
| Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 10.9 | 11.6 | 11.2 | 6.1 | 8.4 | 6.7 | 10.7 | 11.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 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 |
| Value | -0.11 | -0.12 | -2.38 | -0.93 | -0.3 | -0.38 | -0.59 | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 | -0.33 | -0.26 | -0.2 | -2.91 | -0.1 | -0.29 | 25.69 | -4.22 | -4.37 | -2.07 | -3.17 | -3.35 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 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 |
| Value | -0.11 | -0.12 | -2.38 | -0.93 | -0.3 | -0.38 | -0.59 | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 | -0.33 | -0.26 | -0.2 | -2.91 | -0.1 | -0.29 | 9.73 | -4.22 | -4.37 | -2.07 | -3.17 | -3.35 |
| 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 |
| 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 |
| Value | -0.17 | -0.44 | -2.38 | -0.93 | -2.36 | -0.3 | -0.38 | -0.59 | -0.21 | -0.16 | -0.13 | -0.18 | -0.18 | -0.18 | -0.28 | -0.34 |
| Percentage of EarningsPerShareBasicAndDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -0.11 | -0.13 | -2.37 | -0.93 |
| Percentage of IncomeLossFromContinuingOperationsPerBasicShare | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -0.11 | -0.13 | -2.37 | -0.93 |
| Percentage of IncomeLossFromContinuingOperationsPerDilutedShare | 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 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 0.573 | 5.758 | 4.75 | 4.537 | 5.049 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 8.657 | 4.799 | 4.709 | 4.436 | 4.194 | 4.382 | 6.154 |
| Percentage of AllocatedShareBasedCompensationExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | 1.6 | 1.7 | 1.6 | 1.2 | 1.6 | 1.4 | 0.2 | 2.6 | 2.5 | 2.3 | 2.6 | 2.7 | 3.3 | 2.7 | 3.8 | 5.3 | 5.0 | 4.8 | 9.8 | 8.0 | 8.3 | 9.0 | 9.1 | 10.8 | 59.1 |
| 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 |
| Value | 0.222 | 1.085 | 1.079 | 0.876 | 1.059 | 0.827 | 0.737 | 0.737 | 0.717 | 0.253 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of AllocatedShareBasedCompensationExpense | 6.1 | 29.3 | 25.5 | 27.7 | 28.6 | 23.6 | 128.6 | 12.8 | 15.1 | 5.6 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.5 | 0.4 | 0.3 | 0.4 | 0.3 | 0.3 | 0.3 | 0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:LeveragedStockUnitsLSUs | 0.0 | 0.0 | 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 | 2020-06-30 | 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 | 0.737 | 0.243 | 0.0 | 0.0 | -3.566 | 2.406 | 0.388 | 0.384 | 0.388 | 0.0 | 0.0 | 0.0 |
| Percentage of AllocatedShareBasedCompensationExpense | 20.2 | 6.6 | 0.0 | 0.0 | -622.3 | 41.8 | 8.2 | 8.5 | 7.7 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.3 | 0.1 | 0.0 | 0.0 | -1.5 | 1.1 | 0.2 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PerformanceBasedRestrictedStockUnitsPBRSUs | 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 |
| Value | 0.267 | 0.404 | 0.955 | 0.584 | 0.638 | 0.75 | 1.751 | 0.223 | 0.903 | 1.36 | 1.999 | 2.139 | 2.639 | 2.231 | 3.035 | 4.291 | 4.108 | 4.053 | 3.686 | 4.074 | 4.044 | 3.929 | 3.765 | 3.982 | 1.166 |
| Percentage of AllocatedShareBasedCompensationExpense | 7.3 | 10.9 | 22.6 | 18.5 | 17.2 | 21.4 | 305.6 | 3.9 | 19.0 | 30.0 | 39.6 | 52.9 | 55.9 | 58.8 | 71.2 | 75.2 | 76.6 | 79.4 | 42.6 | 84.9 | 85.9 | 88.6 | 89.8 | 90.9 | 18.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.2 | 0.4 | 0.2 | 0.3 | 0.3 | 0.7 | 0.1 | 0.5 | 0.7 | 1.0 | 1.4 | 1.8 | 1.6 | 2.7 | 4.0 | 3.8 | 3.8 | 4.2 | 6.8 | 7.2 | 7.9 | 8.2 | 9.9 | 11.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EmployeeStockOption | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 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 |
| Value | 0.0 | 0.0 | 0.0 | 0.075 | 0.114 | 0.112 | 0.112 | 0.11 | 0.113 | 0.113 | 0.111 | 0.11 | 0.112 | 0.113 | 0.112 | 0.11 | 0.113 | 0.113 | 0.123 | 0.025 |
| Percentage of AllocatedShareBasedCompensationExpense | 0.0 | 0.0 | 0.0 | 2.1 | 19.9 | 1.9 | 2.4 | 2.4 | 2.2 | 2.8 | 2.4 | 2.9 | 2.6 | 2.0 | 2.1 | 2.2 | 1.3 | 2.4 | 2.6 | 0.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 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 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:PerformanceShares | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 2.427 | 1.974 | 2.197 | 1.704 | 2.006 | 1.856 | 1.537 | 2.28 | 2.63 | 2.43 | 2.549 | 1.795 | 1.968 | 1.454 | 1.118 | 1.304 | 1.14 | 0.941 | 0.7 | 0.725 | 0.665 | 0.507 | 0.429 | 0.4 | 0.113 |
| Percentage of AllocatedShareBasedCompensationExpense | 66.4 | 53.3 | 51.9 | 53.9 | 54.2 | 52.9 | 268.2 | 39.6 | 55.4 | 53.6 | 50.5 | 44.4 | 41.7 | 38.3 | 26.2 | 22.8 | 21.3 | 18.4 | 8.1 | 15.1 | 14.1 | 11.4 | 10.2 | 9.1 | 1.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.1 | 0.9 | 0.8 | 0.6 | 0.8 | 0.8 | 0.6 | 1.0 | 1.4 | 1.2 | 1.3 | 1.2 | 1.4 | 1.0 | 1.0 | 1.2 | 1.1 | 0.9 | 0.8 | 1.2 | 1.2 | 1.0 | 0.9 | 1.0 | 1.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RestrictedStockUnitsRSU | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 0.892 | 0.595 | 0.457 | 0.436 | 0.526 | 0.392 | -0.606 | 1.597 | 0.891 | 0.791 | 0.345 | 0.376 | 0.438 | 0.316 | 0.228 | 0.401 | 0.391 | 0.349 | 1.451 | 0.369 | 0.406 | 0.395 | 0.351 | 0.384 | 0.409 |
| Percentage of AllocatedShareBasedCompensationExpense | 24.4 | 16.1 | 10.8 | 13.8 | 14.2 | 11.2 | -105.8 | 27.7 | 18.8 | 17.4 | 6.8 | 9.3 | 9.3 | 8.3 | 5.3 | 7.0 | 7.3 | 6.8 | 16.8 | 7.7 | 8.6 | 8.9 | 8.4 | 8.8 | 6.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | -0.3 | 0.7 | 0.5 | 0.4 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.4 | 0.4 | 0.3 | 1.6 | 0.6 | 0.7 | 0.8 | 0.8 | 1.0 | 3.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CostOfSales | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 2.761 | 3.111 | 3.774 | 2.728 | 3.177 | 3.116 | 1.179 | 4.161 | 3.859 | 3.746 | 4.704 | 3.671 | 4.28 | 3.479 | 4.037 | 5.307 | 4.969 | 4.755 | 7.206 | 4.43 | 4.303 | 4.041 | 3.843 | 3.998 | 5.745 |
| Percentage of AllocatedShareBasedCompensationExpense | 75.6 | 83.9 | 89.2 | 86.2 | 85.8 | 88.8 | 205.8 | 72.3 | 81.2 | 82.6 | 93.2 | 90.7 | 90.7 | 91.7 | 94.7 | 93.0 | 92.7 | 93.2 | 83.2 | 92.3 | 91.4 | 91.1 | 91.6 | 91.2 | 93.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 1.4 | 1.4 | 1.0 | 1.3 | 1.3 | 0.5 | 1.9 | 2.0 | 1.9 | 2.4 | 2.4 | 3.0 | 2.5 | 3.5 | 4.9 | 4.6 | 4.5 | 8.2 | 7.4 | 7.6 | 8.2 | 8.3 | 9.9 | 55.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SellingGeneralAndAdministrativeExpenses | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | -9165000.0 | -9838000.0 | -14583000.0 | -37277000.0 | -203520000.0 | -78905000.0 | -198120000.0 | -25589000.0 | -31604000.0 | -46715000.0 | -16605000.0 | -12545000.0 | -10064000.0 | -13626000.0 | -13159000.0 | -12588000.0 | -16905000.0 | -18012000.0 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.4 | -14.1 | -85.3 | -31.9 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.4 | -7.0 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 |
| 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | -822000.0 | 0 | 0 | -1197000.0 | -217000.0 | -285000.0 | -1910000.0 | -853000.0 | -126000.0 | -115000.0 | -439000.0 | -631000.0 | -541000.0 | -2793000.0 | -5137000.0 |
| Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | 100.0 | 0.0 | 0.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | -0.3 | 0.0 | 0.0 | -0.5 | -0.1 | -0.1 | -1.0 | -0.4 | -0.1 | -0.1 | -0.3 | -0.6 | -0.5 | -2.6 | -4.8 |
| 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 |
| Value | -9165000.0 | -9838000.0 | -13761000.0 | -38099000.0 | -203520000.0 | -78905000.0 | -199310000.0 | -25806000.0 | -31889000.0 | -48625000.0 | -17458000.0 | -12671000.0 | -10179000.0 | -14065000.0 | -13790000.0 | -13129000.0 | -19698000.0 | -23149000.0 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.1 | -14.4 | -85.3 | -31.9 | -84.3 | -11.7 | -16.6 | -24.6 | -9.0 | -8.5 | -7.1 | -10.1 | -12.1 | -12.2 | -18.4 | -21.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 0.0 | -19.158 | 0.0 | -4.789 |
| Percentage of GainsLossesOnExtinguishmentOfDebt | 0.0 | 100.0 | 0.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | -8.9 | 0.0 | -1.8 |
| Period End | 2021-01-08 |
| Value | 19 |
| Percentage of GainsLossesOnExtinguishmentOfDebt | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:CreditAgreement us-gaap:LineOfCredit | 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 |
| Value | -9.016 | -10.579 | -14.225 | -37.667 | -207.425 | -78.482 | -220.882 | -26.587 | -30.502 | -49.145 | -17.529 | -12.42 | -10.14 | -14.062 | -18.418 | -14.843 | -20.398 | -22.744 | -34.334 | -16.031 | -12.37 | -174.9 | -13.961 | -17.192 | 385 | -11.319 | -10.698 | -3.167 | -5.939 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.9 | -5.2 | -14.2 | -86.9 | -31.7 | -93.4 | -12.1 | -15.9 | -24.9 | -9.1 | -8.3 | -7.0 | -10.1 | -16.2 | -13.8 | -19.1 | -21.4 | -39.0 | -26.6 | -21.9 | -353.7 | -30.3 | -42.5 | 3704.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -9107000.0 | -11190000.0 | -202010000.0 | -78487000.0 |
| Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -5.2 | -84.7 | -31.7 |
| 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 |
| Value | 0.091 | 0.611 | -0.422 | 0.503 | -3.904 | 0.27 | -21.589 | -0.849 | 1.398 | -0.496 | 0.011 | 0.135 | -0.109 | 0.003 | -4.637 | -1.7 | -0.7 | 0.4 | -9.155 | -0.256 | -0.371 | -0.988 | -5.694 | -0.104 | 29 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.3 | -0.2 | 0.2 | -1.6 | 0.1 | -9.1 | -0.4 | 0.7 | -0.3 | 0.0 | 0.1 | -0.1 | 0.0 | -4.1 | -1.6 | -0.7 | 0.4 | -10.4 | -0.4 | -0.7 | -2.0 | -12.4 | -0.3 | 281.1 | 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 |
| Value | 6.274 | 6.337 | 8.34 | 7.419 | 6.293 | 6.285 | 3.722 | 3.63 | 3.62 | 3.562 | 2.923 | 0.853 | 0.855 | 0.853 | 0.855 | 0.88 | 0.947 | 0.954 | 0.247 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.8 | 2.9 | 3.1 | 2.8 | 2.6 | 2.5 | 1.6 | 1.6 | 1.9 | 1.8 | 1.5 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.9 | 0.9 | 0.3 | 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 200000.0 | 100000.0 | 200000.0 | 300000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 | 600000.0 |
| Percentage of InterestExpenseDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.0 | 0.1 | 0.1 | 0.3 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.6 | 0.6 | 0.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:ConvertibleSeniorNotesdue2021 us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 1000000.0 | 1000000.0 | 1000000.0 | 500000.0 |
| Percentage of InterestExpenseDebt | 500.0 | 1000.0 | 500.0 | 166.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.5 | 0.5 | 0.4 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:SeniorConvertibleNotesDue2024 us-gaap:SeniorNotes | 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 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 700000.0 | 600000.0 | 2000000.0 | 600000.0 | 700000.0 | 700000.0 | 600000.0 | 700000.0 | 600000.0 |
| Percentage of InterestExpenseDebt | 350.0 | 600.0 | 1000.0 | 200.0 | 116.7 | 116.7 | 100.0 | 116.7 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.3 | 0.3 | 0.7 | 0.2 | 0.3 | 0.3 | 0.3 | 0.4 | 0.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:SeniorConvertibleNotesDue2025 us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-01-08 |
| Value | 0.2 |
| Percentage of InterestPaidNet | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:CreditAgreement us-gaap:LineOfCredit | 0.0 |
| Period End | 2021-01-08 |
| Value | 0.2 |
| Percentage of InterestPaidNet | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:SeniorCreditFacilities us-gaap:SecuredDebt | 0.0 |
| Period End | 2021-01-08 |
| Value | 0.2 |
| Percentage of InterestPaidNet | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:CreditAgreement us-gaap:SubsequentEvent | 0.0 |
| Period End | 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 |
| Value | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.16 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 | -19.8 | -18.6 | -14.8 | -248.4 | -8.9 | -29.6 | 3456.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 0.957 | 11 | -25.327 | 14 | 8.272 | -0.075 |
| Percentage of NetIncomeLoss | -6.5 | -29.8 | 12.4 | -7.4 | -32.4 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 4.2 | -10.6 | 6.2 | 3.8 | -0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 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 |
| Value | 822000.0 | -822000.0 | 0 | 0 | -1197000.0 | -217000.0 | -285000.0 | -1910000.0 | -853000.0 | -126000.0 | -115000.0 | -439000.0 | -631000.0 | -541000.0 | -2793000.0 | -5137000.0 | -7786000.0 | -4567000.0 | -3612000.0 | -51100000.0 | -4148000.0 | -5108000.0 | -3424000.0 | 0 | 0 | 0 | 0 | 0 |
| Percentage of NetIncomeLossAttributableToNoncontrollingInterest | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.3 | -0.3 | 0.0 | 0.0 | -0.5 | -0.1 | -0.1 | -1.0 | -0.4 | -0.1 | -0.1 | -0.3 | -0.6 | -0.5 | -2.6 | -4.8 | -8.8 | -7.6 | -6.4 | -103.3 | -9.0 | -12.6 | -32.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 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 |
| Value | 822000.0 | 0 | 0 | 6021000.0 | -217000.0 | -285000.0 | -1910000.0 | -853000.0 | -126000.0 | -115000.0 | -439000.0 | -631000.0 | -541000.0 | -2793000.0 | -5137000.0 | -7786000.0 | -4567000.0 | -3612000.0 | -51100000.0 | -4148000.0 | -5108000.0 | -3424000.0 |
| Percentage of NetIncomeLossAttributableToNoncontrollingInterest | -100.0 | 0.0 | 0.0 | -503.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | 0.3 | 0.0 | 0.0 | 2.5 | -0.1 | -0.1 | -1.0 | -0.4 | -0.1 | -0.1 | -0.3 | -0.6 | -0.5 | -2.6 | -4.8 | -8.8 | -7.6 | -6.4 | -103.3 | -9.0 | -12.6 | -32.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 |
| Period End | 2021-06-30 | 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 |
| Value | -9.107 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359 | -12.609 | -11.994 | -5.196 | -7.21 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -85.3 | -31.8 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 | -19.8 | -18.6 | -14.8 | -248.4 | -8.9 | -29.6 | 3447.5 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2020-06-30 | 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 |
| Value | -9.107 | -203.521 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -8.267 | -11.98 | 356 | -12.609 | -11.994 | -5.196 | -7.21 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -85.3 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 | -19.8 | -18.6 | -14.8 | -248.4 | -17.9 | -29.6 | 3423.2 | 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 |
| Value | 229 | 231 | 276 | 282 | 466 | 272 | 451 | 240 | 217 | 244 | 206 | 160 | 153 | 153 | 131 | 121 | 126 | 127 | 121 | 76 | 69 | 224 | 60 | 57 | 21 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 103.5 | 107.4 | 101.7 | 106.7 | 195.3 | 110.3 | 190.7 | 109.1 | 113.1 | 123.6 | 106.9 | 107.4 | 106.2 | 110.1 | 116.0 | 113.0 | 117.9 | 120.2 | 138.5 | 126.3 | 122.3 | 454.3 | 130.8 | 142.7 | 210.8 | 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 |
| Value | -7.671 | -15.945 | 0.053 | -17.708 | -227.469 | -25.5 | -214.595 | -20.138 | -25.233 | -46.646 | -13.352 | -11.03 | -8.966 | -14.132 | -18.247 | -14.02 | -19.117 | -21.455 | -33.873 | -15.839 | -12.629 | -175.179 | -14.187 | -17.246 | -11.539 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -3.5 | -7.4 | 0.0 | -6.7 | -95.3 | -10.3 | -90.7 | -9.1 | -13.1 | -23.6 | -6.9 | -7.4 | -6.2 | -10.1 | -16.0 | -13.0 | -17.9 | -20.2 | -38.5 | -26.3 | -22.3 | -354.3 | -30.8 | -42.7 | -110.8 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 6.081 | 19 | -40.065 | 48 | 6.447 | -0.254 |
| Percentage of OperatingIncomeLoss | 11473.6 | -112.3 | 17.6 | -22.5 | -32.0 | 1.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.2 | 7.5 | -16.8 | 20.4 | 2.9 | -0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 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 |
| Value | -58000.0 | -31000.0 | 42000.0 | 71000.0 | -4000.0 | -153000.0 | -19000.0 | -68000.0 | 11000.0 | 24000.0 | 64000.0 | -116000.0 | -148000.0 | 0 | 0 | 0 | 0 | 0 |
| Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.0 | -0.0 | 0.0 | 0.0 | -0.0 | -0.1 | -0.0 | -0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -0.1 | 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 |
| Value | -58000.0 | -31000.0 | 42000.0 | 71000.0 | -4000.0 | -153000.0 | -19000.0 | -68000.0 | 11000.0 | 24000.0 | 82000.0 | -116000.0 | -148000.0 | 0 |
| Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 128.1 | 100.0 | 100.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.0 | -0.0 | 0.0 | 0.0 | -0.0 | -0.1 | -0.0 | -0.0 | 0.0 | 0.0 | 0.0 | -0.1 | -0.1 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.0 | 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 |
| Value | -58000.0 | -31000.0 | 42000.0 | 71000.0 | -4000.0 | -153000.0 |
| Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.0 | -0.0 | 0.0 | 0.0 | -0.0 | -0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent | 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 | 2015-09-30 | 2015-06-30 |
| Value | -18000.0 | -14000.0 | -289000.0 | -111000.0 | 352000.0 | -71000.0 | -248000.0 | -84000.0 | -587000.0 | 427000.0 | 173000.0 | -124000.0 | 78000.0 | -18000.0 | 150000.0 | 15000.0 | 3000.0 | 2000.0 | 0 | 1000.0 | 1000.0 | 0 | 0 | 0 |
| 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 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.0 | -0.0 | -0.1 | -0.0 | 0.1 | -0.0 | -0.1 | -0.0 | -0.3 | 0.2 | 0.1 | -0.1 | 0.1 | -0.0 | 0.1 | 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 |
| Value | -9.107 | -9.807 | -13.803 | -38.17 | -203.521 | -78.752 | -199.293 | -25.738 | -31.9 | -48.649 | -17.54 | -12.555 | -10.031 | -14.065 | -13.791 | -13.129 | -19.698 | -23.149 | -25.193 | -15.775 | -11.999 | -173.912 | -8.267 | -17.088 | 356 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.1 | -14.4 | -85.3 | -31.8 | -84.3 | -11.7 | -16.6 | -24.6 | -9.1 | -8.4 | -7.0 | -10.1 | -12.1 | -12.2 | -18.4 | -21.8 | -28.6 | -26.2 | -21.2 | -351.7 | -17.9 | -42.3 | 3423.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 6.08 | 14 | -39.263 | 53 | 8.358 | -0.34 |
| Percentage of ProfitLoss | -44.0 | -39.2 | 19.3 | -26.7 | -32.5 | 1.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.2 | 5.7 | -16.5 | 22.5 | 3.8 | -0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 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 | -0.822 | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 |
| Percentage of ProfitLoss | 2.2 | 0.6 | 0.8 | 0.9 | 3.9 | 4.9 | 1.0 | 1.1 | 3.1 | 4.6 | 4.1 | 14.2 | 22.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.3 | -0.5 | -0.1 | -0.1 | -1.0 | -0.4 | -0.1 | -0.1 | -0.3 | -0.6 | -0.5 | -2.6 | -4.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 106.0 | 97.8 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent | 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 |
| Value | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.906 | -18.012 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 106.0 | 97.8 | 100.0 | 100.0 | 99.4 | 99.2 | 99.1 | 96.1 | 95.1 | 99.0 | 98.9 | 96.9 | 95.4 | 95.9 | 85.8 | 77.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 |
| 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 |
| Value | 222 | 215 | 271 | 264 | 238 | 247 | 236 | 220 | 191 | 197 | 193 | 149 | 144 | 139 | 113 | 107 | 107 | 106 | 88 | 60 | 56 | 49 | 46 | 40 | 10 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | -4.783 | -4.615 | -4.208 | -6.535 | -3.295 | -3.494 | -3.348 | -3.324 | -3.58 | -3.743 | -3.817 | -3.991 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.8 | -2.6 | -1.4 | -1.6 | -1.7 | -1.7 | -1.9 | -2.5 | -2.6 | -2.9 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.8 | -2.6 | -1.4 | -1.6 | -1.7 | -1.7 | -1.9 | -2.5 | -2.6 | -2.9 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -4.86 | -4.615 | -4.169 | -6.295 | -3.095 | -3.25 | -3.077 | -3.059 | -3.376 | -3.537 | -3.615 | -3.797 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.7 | -2.5 | -1.3 | -1.5 | -1.6 | -1.5 | -1.7 | -2.4 | -2.5 | -2.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.7 | -2.5 | -1.3 | -1.5 | -1.6 | -1.5 | -1.7 | -2.4 | -2.5 | -2.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination evh:PlatformsAndOperationsServices | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.077 | 0.0 | -0.039 | -0.24 | -0.2 | -0.244 | -0.271 | -0.265 | -0.204 | -0.206 | -0.202 | -0.194 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | -0.0 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination evh:PremiumsRevenue | 100.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -4.86 | -4.615 | -4.169 | -6.295 | -3.095 | -3.25 | -3.077 | -3.059 | -3.376 | -3.537 | -3.615 | -3.797 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.7 | -2.5 | -1.3 | -1.5 | -1.6 | -1.5 | -1.7 | -2.4 | -2.5 | -2.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -1.8 | -1.7 | -1.7 | -2.5 | -1.3 | -1.5 | -1.6 | -1.5 | -1.7 | -2.4 | -2.5 | -2.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination us-gaap:Service | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 245 | 234 | 216 | 216 | 199 | 174 | 147 | 150 | 162 | 121 | 116 | 113 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.2 | 88.8 | 90.7 | 87.4 | 84.3 | 79.4 | 76.9 | 76.0 | 84.1 | 81.1 | 81.1 | 81.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.2 | 88.8 | 90.7 | 87.4 | 84.3 | 79.4 | 76.9 | 76.0 | 84.1 | 81.1 | 81.1 | 81.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:PlatformsAndOperationsServices evh:ServicesSegment | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 30 | 29 | 25 | 32 | 35 | 43 | 45 | 47 | 25 | 22 | 22 | 23 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.1 | 15.1 | 19.9 | 23.8 | 24.0 | 13.2 | 15.2 | 15.9 | 16.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.1 | 15.1 | 19.9 | 23.8 | 24.0 | 13.2 | 15.2 | 15.9 | 16.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:PremiumsRevenue evh:TrueHealthSegment | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 1.19 | 4.807 | 0.755 | 5.238 | 4.722 | 5.184 | 1.944 | 3.353 | 8.966 | 9.23 | 8.215 | 6.505 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:TransformationServices evh:ServicesSegment | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 246 | 239 | 217 | 221 | 204 | 179 | 149 | 153 | 171 | 130 | 125 | 120 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.7 | 90.6 | 91.1 | 89.5 | 86.3 | 81.7 | 77.9 | 77.7 | 88.7 | 87.3 | 86.7 | 86.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.7 | 90.6 | 91.1 | 89.5 | 86.3 | 81.7 | 77.9 | 77.7 | 88.7 | 87.3 | 86.7 | 86.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Service evh:ServicesSegment | 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 | 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 | 246 | 239 | 217 | 221 | 204 | 179 | 149 | 153 | 171 | 130 | 125 | 120 | 113 | 107 | 107 | 106 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.7 | 90.6 | 91.1 | 89.5 | 86.3 | 81.7 | 77.9 | 77.7 | 88.7 | 87.3 | 86.7 | 86.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 90.7 | 90.6 | 91.1 | 89.5 | 86.3 | 81.7 | 77.9 | 77.7 | 88.7 | 87.3 | 86.7 | 86.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:ServicesSegment | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 30 | 29 | 25 | 32 | 35 | 43 | 45 | 47 | 25 | 22 | 22 | 23 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.1 | 15.1 | 19.9 | 23.8 | 24.0 | 13.2 | 15.2 | 15.9 | 16.9 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.1 | 15.1 | 19.9 | 23.8 | 24.0 | 13.2 | 15.2 | 15.9 | 16.9 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:TrueHealthSegment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 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 | 52 | 49 | 50 | 50 | 49 | 49 | 49 | 50 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 19.4 | 18.6 | 21.2 | 20.2 | 20.8 | 22.6 | 25.6 | 25.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 19.4 | 18.6 | 21.2 | 20.2 | 20.8 | 22.6 | 25.6 | 25.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:AdministrativeSolutions evh:PlatformsAndOperationsServices evh:ServicesSegment | 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 | 187 | 181 | 161 | 159 | 146 | 121 | 94 | 96 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 69.0 | 68.4 | 67.8 | 64.6 | 61.9 | 55.1 | 49.3 | 48.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 69.0 | 68.4 | 67.8 | 64.6 | 61.9 | 55.1 | 49.3 | 48.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:ClinicalSolutions evh:PlatformsAndOperationsServices evh:ServicesSegment | 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 | 2.785 | 1.111 | 2.522 | 2.039 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 0.5 | 1.1 | 0.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 0.5 | 1.1 | 0.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:CommercialAndOtherCustomers evh:ClinicalSolutionsSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 16 | 15 | 16 | 22 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 7.4 | 7.2 | 7.1 | 9.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 7.4 | 7.2 | 7.1 | 9.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:CommercialAndOtherCustomers evh:EvolentHealthServicesSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 53 | 43 | 64 | 60 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 24.2 | 20.2 | 26.8 | 24.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 24.2 | 20.2 | 26.8 | 24.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:MedicaidCustomers evh:ClinicalSolutionsSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 52 | 60 | 55 | 58 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 23.4 | 28.3 | 23.3 | 23.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 23.4 | 28.3 | 23.3 | 23.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:MedicaidCustomers evh:EvolentHealthServicesSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 90 | 85 | 64 | 62 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 40.9 | 39.9 | 26.9 | 25.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 40.9 | 39.9 | 26.9 | 25.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:MedicareCustomers evh:ClinicalSolutionsSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 6.346 | 8.338 | 14 | 15 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.9 | 3.9 | 5.9 | 6.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.9 | 3.9 | 5.9 | 6.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:MedicareCustomers evh:EvolentHealthServicesSegment | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 240 | 230 | 212 | 209 | 196 | 171 | 144 | 147 | 158 | 118 | 113 | 109 | 108 | 99 | 101 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 88.4 | 87.0 | 89.0 | 84.9 | 82.9 | 77.9 | 75.3 | 74.5 | 82.3 | 78.8 | 78.5 | 78.6 | 95.0 | 92.4 | 95.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 88.4 | 87.0 | 89.0 | 84.9 | 82.9 | 77.9 | 75.3 | 74.5 | 82.3 | 78.8 | 78.5 | 78.6 | 95.0 | 92.4 | 95.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 30 | 29 | 25 | 32 | 35 | 43 | 45 | 47 | 25 | 22 | 22 | 23 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.0 | 15.1 | 19.8 | 23.7 | 23.8 | 13.1 | 15.1 | 15.8 | 16.7 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 11.1 | 11.1 | 10.7 | 13.0 | 15.1 | 19.8 | 23.7 | 23.8 | 13.1 | 15.1 | 15.8 | 16.7 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PremiumsRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 1.19 | 4.807 | 0.755 | 5.238 | 4.722 | 5.184 | 1.944 | 3.353 | 8.966 | 9.23 | 8.215 | 6.505 | 5.667 | 8.204 | 5.361 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 | 5.0 | 7.6 | 5.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 | 5.0 | 7.6 | 5.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:TransformationServices | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 241 | 235 | 213 | 215 | 200 | 176 | 146 | 150 | 167 | 127 | 121 | 116 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 88.9 | 88.9 | 89.3 | 87.0 | 84.9 | 80.2 | 76.3 | 76.2 | 86.9 | 84.9 | 84.2 | 83.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 88.9 | 88.9 | 89.3 | 87.0 | 84.9 | 80.2 | 76.3 | 76.2 | 86.9 | 84.9 | 84.2 | 83.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 12 | 72 | 73 | 67 | 15 | 15 | 16 | 12 | 10 | 12 | 7.601 | 7.291 | 7.571 | 9.411 | 8.575 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 4.5 | 27.4 | 31.0 | 27.5 | 6.5 | 6.9 | 8.8 | 6.5 | 5.4 | 8.1 | 5.3 | 5.2 | 6.7 | 8.7 | 8.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 4.5 | 27.4 | 31.0 | 27.5 | 6.5 | 6.9 | 8.8 | 6.5 | 5.4 | 8.1 | 5.3 | 5.2 | 6.7 | 8.7 | 8.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices srt:AffiliatedEntity | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 |
| Value | 0.0 | 3.716 | 0.0 | 1.7 | 0.709 | 2.1 | 0.041 | 1.159 | 4.428 | 5.332 | 0.748 | 0.032 | 0.0 | 0.352 | 0.048 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 1.4 | 0.0 | 0.7 | 0.3 | 1.0 | 0.0 | 0.6 | 2.3 | 3.6 | 0.5 | 0.0 | 0.0 | 0.3 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 1.4 | 0.0 | 0.7 | 0.3 | 1.0 | 0.0 | 0.6 | 2.3 | 3.6 | 0.5 | 0.0 | 0.0 | 0.3 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:TransformationServices srt:AffiliatedEntity | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 1.19 | 4.807 | 0.755 | 5.238 | 4.722 | 5.184 | 1.944 | 3.353 | 8.966 | 9.23 | 8.215 | 6.505 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:TransformationServices evh:ServicesSegment | 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 | 147 | 130 | 130 | 124 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 66.3 | 60.6 | 54.8 | 50.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 66.3 | 60.6 | 54.8 | 50.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:ClinicalSolutionsSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 74 | 84 | 86 | 96 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 33.7 | 39.4 | 36.3 | 39.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 33.7 | 39.4 | 36.3 | 39.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:EvolentHealthServicesSegment | 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 |
| Value | 222 | 215 | 271 | 264 | 217 | 221 | 236 | 220 | 191 | 197 | 193 | 149 | 144 | 139 | 113 | 107 | 107 | 106 | 88 | 60 | 56 | 49 | 46 | 40 | 10 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 100.0 | 100.0 | 100.0 | 100.0 | 91.1 | 89.5 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 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 | -0.46 | -0.438 | -4.783 | -4.615 | -0.668 | -0.668 | -3.295 | -3.494 | -3.348 | -3.324 | -3.58 | -3.743 | -3.817 | -3.991 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Revenues | -0.2 | -0.2 | -1.8 | -1.7 | -0.3 | -0.3 | -1.4 | -1.6 | -1.7 | -1.7 | -1.9 | -2.5 | -2.6 | -2.9 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.2 | -0.2 | -1.8 | -1.7 | -0.3 | -0.3 | -1.4 | -1.6 | -1.7 | -1.7 | -1.9 | -2.5 | -2.6 | -2.9 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination | 0.0 | 0.0 | 100.0 | 100.0 | 15.9 | 10.2 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 222 | 215 | 217 | 221 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 100.0 | 100.0 | 91.1 | 89.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -0.46 | -0.438 | -0.668 | -0.668 |
| Percentage of Revenues | -0.2 | -0.2 | -0.3 | -0.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.2 | -0.2 | -0.3 | -0.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination evh:PlatformsAndOperationsServices | 0.0 | 0.0 | 16.0 | 10.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 219 | 214 | 216 | 215 |
| Percentage of Revenues | 98.8 | 99.8 | 99.7 | 97.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 98.8 | 99.8 | 90.7 | 87.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:PlatformsAndOperationsServices | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 2.564 | 0.345 | 0.755 | 5.238 |
| Percentage of Revenues | 1.2 | 0.2 | 0.3 | 2.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 0.2 | 0.3 | 2.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments evh:TransformationServices | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 71 | 501 | 575 | 97 | 100 | 30 |
| Percentage of Revenues | 26.2 | 189.4 | 265.0 | 41.2 | 45.7 | 15.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 26.2 | 189.4 | 241.3 | 41.2 | 45.7 | 15.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 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 | 219 | 214 | 216 | 215 |
| Percentage of Revenues | 98.8 | 99.8 | 99.7 | 97.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 98.8 | 99.8 | 90.7 | 87.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices | 0.0 | 0.0 | 102.0 | 102.9 |
| 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 |
| Value | 2.564 | 0.345 | 1.19 | 4.807 | 0.755 | 5.238 | 4.722 | 5.184 | 1.944 | 3.353 | 8.966 | 9.23 | 8.215 | 6.505 | 5.667 | 8.204 | 5.361 |
| Percentage of Revenues | 1.2 | 0.2 | 0.4 | 1.8 | 0.3 | 2.4 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 | 5.0 | 7.6 | 5.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 0.2 | 0.4 | 1.8 | 0.3 | 2.1 | 2.0 | 2.4 | 1.0 | 1.7 | 4.6 | 6.2 | 5.7 | 4.7 | 5.0 | 7.6 | 5.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:TransformationServices | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 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 | 10 | 15 | 12 | 72 | 73 | 74 | 15 | 15 | 16 | 12 | 10 | 12 | 7.601 | 7.291 | 7.571 | 9.411 | 8.575 |
| Percentage of Revenues | 4.7 | 7.2 | 4.5 | 27.4 | 34.0 | 33.5 | 6.5 | 6.9 | 8.8 | 6.5 | 5.4 | 8.1 | 5.3 | 5.2 | 6.7 | 8.7 | 8.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 4.7 | 7.2 | 4.5 | 27.4 | 31.0 | 30.0 | 6.5 | 6.9 | 8.8 | 6.5 | 5.4 | 8.1 | 5.3 | 5.2 | 6.7 | 8.7 | 8.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices srt:AffiliatedEntity | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 109.0 | 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 | 147 | 130 | 130 | 124 |
| Percentage of Revenues | 66.3 | 60.5 | 60.2 | 56.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 66.3 | 60.5 | 54.8 | 50.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices evh:ClinicalSolutionsSegment | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 72 | 84 | 86 | 91 |
| Percentage of Revenues | 32.8 | 39.5 | 39.8 | 41.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 32.8 | 39.5 | 36.2 | 37.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:PlatformsAndOperationsServices evh:EvolentHealthServicesSegment | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 2.564 | 0.345 | 0.755 | 5.238 |
| Percentage of Revenues | 1.2 | 0.2 | 0.3 | 2.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 0.2 | 0.3 | 2.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:TransformationServices evh:EvolentHealthServicesSegment | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 147 | 130 | 130 | 124 |
| Percentage of Revenues | 66.3 | 60.5 | 60.2 | 56.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 66.3 | 60.5 | 54.8 | 50.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:ClinicalSolutionsSegment | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 75 | 85 | 87 | 97 |
| Percentage of Revenues | 33.9 | 39.7 | 40.1 | 43.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 33.9 | 39.7 | 36.5 | 39.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax evh:EvolentHealthServicesSegment | 100.6 | 100.5 | 100.8 | 100.7 |
| 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 |
| Value | 42 | 58 | 61 | 55 | 50 | 54 | 56 | 58 | 66 | 74 | 62 | 59 | 57 | 55 | 55 | 45 | 51 | 53 | 57 | 38 | 32 | 32 | 32 | 29 | 13 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 19.2 | 27.2 | 22.7 | 21.1 | 21.2 | 22.1 | 23.9 | 26.7 | 34.9 | 37.8 | 32.6 | 39.7 | 39.8 | 39.7 | 48.5 | 42.5 | 47.7 | 50.4 | 65.4 | 63.8 | 58.0 | 64.9 | 70.3 | 73.8 | 125.6 | 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 |
| Value | 0.081 | 0.031 | 0.016 | 0.0 | 0.027 | 0.07 | 0.219 | 0.229 | 0.386 | 0.156 | 0.297 | 0.241 | 0.28 | 0.099 | 0.115 | 0.514 | 0.119 |
| Percentage of SellingGeneralAndAdministrativeExpense | 0.2 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.4 | 0.4 | 0.6 | 0.2 | 0.5 | 0.4 | 0.5 | 0.2 | 0.2 | 1.1 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.5 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 | 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 | 2014-12-31 |
| Value | 1293 | 1305 | 1370 | 1391 | 1270 | 1450 | 1498 | 1713 | 1652 | 1629 | 1722 | 1322 | 1321 | 1306 | 1312 | 1299 | 1138 | 1154 | 1199 | 851 | 852 | 856 | 1015 | 1056 | 1039 | 38 |
| 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 |
| 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 |
| 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 | 2014-12-31 |
| Value | 679 | 688 | 750 | 737 | 623 | 603 | 568 | 589 | 505 | 479 | 532 | 274 | 270 | 251 | 266 | 243 | 243 | 257 | 287 | 91 | 84 | 80 | 80 | 120 | 91 | 1.074 |
| 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 |
| Percentage of Assets | 52.5 | 52.7 | 54.8 | 53.0 | 49.1 | 41.6 | 38.0 | 34.4 | 30.6 | 29.4 | 30.9 | 20.7 | 20.4 | 19.2 | 20.3 | 18.7 | 21.4 | 22.3 | 24.0 | 10.7 | 9.9 | 9.4 | 8.0 | 11.4 | 8.8 | 2.8 |
| 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 | 2014-12-31 |
| Value | 1293 | 1305 | 1370 | 1391 | 1270 | 1450 | 1498 | 1713 | 1652 | 1629 | 1722 | 1322 | 1321 | 1306 | 1312 | 1299 | 1138 | 1154 | 1199 | 851 | 852 | 856 | 1015 | 1056 | 1039 | 38 |
| 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 |
| 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 |
| 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 | 2014-12-31 |
| Value | 614 | 617 | 619 | 629 | 646 | 847 | 922 | 1108 | 1130 | 1100 | 1143 | 1038 | 1041 | 1043 | 1010 | 1019 | 859 | 750 | 702 | 562 | 537 | 541 | 649 | 646 | 654 | -2.07 |
| 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 |
| Percentage of Assets | 47.5 | 47.3 | 45.2 | 45.3 | 50.9 | 58.4 | 61.6 | 64.7 | 68.4 | 67.5 | 66.4 | 78.5 | 78.8 | 79.9 | 77.0 | 78.5 | 75.5 | 65.0 | 58.6 | 66.0 | 63.1 | 63.2 | 63.9 | 61.2 | 62.9 | -5.4 |
| 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 | 2014-12-31 |
| Value | 505 | 508 | 546 | 548 | 274 | 258 | 228 | 308 | 240 | 321 | 487 | 348 | 353 | 337 | 378 | 352 | 192 | 217 | 264 | 191 | 170 | 167 | 184 | 246 | 251 | 1.074 |
| 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 |
| Percentage of Assets | 39.1 | 38.9 | 39.9 | 39.4 | 21.6 | 17.8 | 15.3 | 18.0 | 14.6 | 19.7 | 28.3 | 26.4 | 26.7 | 25.8 | 28.8 | 27.1 | 16.9 | 18.8 | 22.1 | 22.5 | 20.0 | 19.6 | 18.2 | 23.3 | 24.2 | 2.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 69 | 46 | 351 | 356 |
| Percentage of AssetsCurrent | 12.7 | 8.4 | 128.1 | 155.6 |
| Percentage of Assets | 5.1 | 3.3 | 27.7 | 23.8 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 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 | 2013-12-31 | 2012-12-31 |
| Value | 207 | 236 | 340 | 370 | 98 | 67 | 101 | 96 | 92 | 170 | 228 | 221 | 197 | 200 | 238 | 287 | 99 | 104 | 134 | 109 | 105 | 111 | 145 | 208 | 219 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5.252 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Percentage of Assets | 16.0 | 18.1 | 24.8 | 26.6 | 7.7 | 4.7 | 6.7 | 5.6 | 5.6 | 10.5 | 13.3 | 16.8 | 15.0 | 15.3 | 18.2 | 22.1 | 8.8 | 9.0 | 11.2 | 12.9 | 12.3 | 13.0 | 14.3 | 19.7 | 21.1 | 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 | 2015-12-31 | 2014-12-31 |
| Value | 238 | 303 | 361 | 400 | 153 | 129 | 128 | 205 | 137 | 227 | 388 | 266 | 254 | 236 | 295 | 295 | 113 | 131 | 170 | 152 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 18.4 | 23.3 | 26.4 | 28.8 | 12.1 | 8.9 | 8.6 | 12.0 | 8.3 | 14.0 | 22.5 | 20.2 | 19.2 | 18.1 | 22.5 | 22.8 | 10.0 | 11.4 | 14.2 | 15.0 | 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 | 2014-12-31 |
| Value | 242 | 185 | 125 | 95 | 95 | 107 | 75 | 74 | 71 | 65 | 80 | 60 | 70 | 66 | 48 | 43 | 45 | 44 | 40 | 21 | 30 | 25 | 20 | 30 | 24 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 18.7 | 14.2 | 9.2 | 6.8 | 7.5 | 7.4 | 5.1 | 4.4 | 4.3 | 4.0 | 4.7 | 4.5 | 5.4 | 5.1 | 3.7 | 3.4 | 4.0 | 3.9 | 3.4 | 2.6 | 3.6 | 2.9 | 2.0 | 2.9 | 2.3 | 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 |
| Value | 4.45 | 8.615 | 9.474 | 8.193 | 7.597 | 12 | 8.781 | 8.519 |
| Percentage of AccountsReceivableNetCurrent | 1.8 | 4.7 | 7.5 | 8.6 | 7.9 | 11.2 | 11.6 | 10.6 |
| Percentage of Assets | 0.3 | 0.7 | 0.7 | 0.6 | 0.6 | 0.8 | 0.6 | 0.5 |
| Percentage of Assets srt:AffiliatedEntity | 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 | 2014-12-31 |
| Value | 38 | 33 | 61 | 55 | 30 | 25 | 28 | 29 | 32 | 30 | 22 | 14 | 15 | 17 | 8.404 | 16 | 12 | 11 | 11 | 4.983 | 5.3 | 4.215 | 4.208 | 3.52 | 3.179 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 2.9 | 2.6 | 4.5 | 4.0 | 2.4 | 1.8 | 1.9 | 1.7 | 2.0 | 1.9 | 1.3 | 1.1 | 1.2 | 1.3 | 0.6 | 1.2 | 1.1 | 1.0 | 0.9 | 0.6 | 0.6 | 0.5 | 0.4 | 0.3 | 0.3 | 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 |
| Value | 0.017 | 0.05 | 0.051 | 0.161 | 0.801 | 1.552 | 1.592 | 0.085 |
| Percentage of PrepaidExpenseAndOtherAssetsCurrent | 0.0 | 0.1 | 0.1 | 0.3 | 2.6 | 6.1 | 5.6 | 0.4 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.0 |
| Percentage of Assets srt:AffiliatedEntity | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 3.859 | 3.909 | 4.612 | 43 |
| Percentage of AssetsNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.3 | 0.3 | 0.4 | 2.9 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 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 | 2014-12-31 | 2013-12-31 |
| Value | 187 | 181 | 175 | 170 | 157 | 147 | 140 | 131 | 122 | 114 | 105 | 94 | 86 | 78 | 65 | 58 | 49 | 42 | 36 | 24 | 21 | 17 | 14 | 11 | 8.617 | 0.0 | 0.0 |
| Percentage of PropertyPlantAndEquipmentGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Percentage of Assets | 14.5 | 13.9 | 12.8 | 12.2 | 12.4 | 10.2 | 9.4 | 7.7 | 7.4 | 7.0 | 6.1 | 7.2 | 6.6 | 6.0 | 5.0 | 4.5 | 4.3 | 3.7 | 3.0 | 2.9 | 2.5 | 2.0 | 1.4 | 1.1 | 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 | 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 |
| Value | 19 | 19 | 18 | 18 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 8.602 | 7.256 | 6.473 | 5.667 | 5.436 | 5.026 | 4.674 | 4.474 | 0.266 | 0.251 | 0.251 | 0.232 | 0.228 | 0.228 |
| Percentage of PropertyPlantAndEquipmentGross | 10.6 | 10.7 | 10.8 | 10.7 | 7.7 | 8.0 | 8.3 | 8.6 | 9.1 | 9.5 | 9.9 | 9.1 | 8.4 | 8.3 | 8.7 | 9.3 | 10.2 | 11.0 | 12.3 | 1.1 | 1.2 | 1.4 | 1.7 | 2.0 | 2.6 |
| Percentage of Assets | 1.5 | 1.5 | 1.4 | 1.3 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.7 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:ComputerEquipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 3.545 | 3.553 | 3.559 | 4.359 | 3.588 | 3.59 | 3.649 | 3.439 | 3.255 | 3.226 | 3.187 | 3.038 | 3.011 | 3.033 | 2.448 | 2.448 | 2.448 | 2.448 | 2.448 | 1.609 | 1.604 | 1.604 | 1.604 | 1.604 | 1.604 |
| Percentage of PropertyPlantAndEquipmentGross | 1.9 | 2.0 | 2.0 | 2.6 | 2.3 | 2.4 | 2.6 | 2.6 | 2.6 | 2.8 | 3.0 | 3.2 | 3.5 | 3.9 | 3.7 | 4.2 | 5.0 | 5.8 | 6.7 | 6.5 | 7.6 | 9.2 | 11.4 | 14.0 | 18.6 |
| Percentage of Assets | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| 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 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 15 | 15 | 15 | 15 | 15 | 12 | 12 | 10 | 9.945 | 10 | 10 | 9.638 | 9.668 | 9.849 | 8.708 | 8.446 | 8.199 | 8.117 | 8.108 | 5.83 | 5.83 | 5.83 | 5.83 | 5.822 | 5.822 |
| Percentage of PropertyPlantAndEquipmentGross | 8.3 | 8.6 | 8.9 | 9.4 | 9.9 | 8.4 | 8.9 | 7.9 | 8.1 | 8.8 | 9.6 | 10.1 | 11.2 | 12.6 | 13.3 | 14.5 | 16.7 | 19.1 | 22.3 | 23.5 | 27.5 | 33.4 | 41.6 | 50.8 | 67.6 |
| Percentage of Assets | 1.2 | 1.2 | 1.1 | 1.1 | 1.2 | 0.9 | 0.8 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 |
| 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 | 0.0 | 0.0 | 0.0 | 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 | 2015-06-30 |
| Value | 148 | 142 | 137 | 131 | 126 | 119 | 112 | 81 | 0.963 |
| Percentage of PropertyPlantAndEquipmentGross | 79.2 | 78.7 | 78.3 | 77.3 | 80.2 | 81.2 | 80.3 | 77.5 | 11.2 |
| Percentage of Assets | 11.5 | 10.9 | 10.0 | 9.5 | 9.9 | 8.3 | 7.5 | 4.7 | 0.1 |
| Percentage of Assets us-gaap:SoftwareDevelopment | 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 |
| Value | 104 | 96 | 88 | 82 | 68 | 61 | 55 | 48 | 42 | 36 | 31 | 26 | 21 | 18 | 14 | 11 | 8.945 | 7.017 | 5.236 | 3.647 | 2.723 | 1.935 | 1.233 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 7.4 | 6.5 | 5.9 | 5.4 | 4.3 | 3.7 | 2.8 | 2.6 | 2.3 | 1.8 | 2.0 | 1.7 | 1.4 | 1.1 | 0.9 | 0.8 | 0.6 | 0.4 | 0.4 | 0.3 | 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 | 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 |
| Value | 7.2 | 7.5 | 7.5 | 7.4 | 8.7 | 9.3 | 9.6 | 9.4 | 9.6 | 9.1 | 9.2 | 6.1 | 6.0 | 5.9 | 7.8 | 5.3 | 4.9 | 4.8 | 4.6 | 2.7 | 2.6 | 2.6 | 2.5 | 2.5 | 0.8 | 0.0 |
| 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 | 0.0 |
| 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 |
| 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 | 2015-06-04 | 2015-05-31 | 2014-12-31 |
| Value | 82 | 84 | 86 | 88 | 88 | 85 | 85 | 83 | 80 | 77 | 73 | 68 | 64 | 60 | 50 | 46 | 40 | 35 | 31 | 21 | 18 | 15 | 12 | 10 | 8.463 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets | 6.4 | 6.5 | 6.3 | 6.3 | 7.0 | 5.9 | 5.7 | 4.9 | 4.9 | 4.7 | 4.3 | 5.2 | 4.9 | 4.6 | 3.9 | 3.6 | 3.5 | 3.1 | 2.6 | 2.5 | 2.2 | 1.8 | 1.3 | 1.0 | 0.8 | 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 | 2015-06-30 |
| Value | 73 | 74 | 75 | 76 | 77 | 76 | 74 | 62 | 1.0 |
| Percentage of PropertyPlantAndEquipmentNet | 88.0 | 87.8 | 87.3 | 86.7 | 87.1 | 89.3 | 88.0 | 85.3 | 11.8 |
| Percentage of Assets | 5.6 | 5.7 | 5.5 | 5.5 | 6.1 | 5.3 | 5.0 | 3.6 | 0.1 |
| Percentage of Assets us-gaap:SoftwareDevelopment | 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 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 |
| Value | 9.788 | 4.909 | 6.498 | 7.473 | 100 | 75 | 122 | 55 | 59 | 6.188 | 6.276 | 5.672 | 4.246 | 5.521 | 1.531 | 0.712 | 1.081 | 1.636 | 2.159 | 2.538 | 2.986 | 0.0 | 0.0 | 0.0 | 37 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Percentage of Assets | 0.8 | 0.4 | 0.5 | 0.5 | 7.9 | 5.2 | 8.2 | 3.2 | 3.6 | 0.4 | 0.4 | 0.4 | 0.3 | 0.4 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.3 | 0.4 | 0.0 | 0.0 | 0.0 | 97.2 |
| 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 | 2015-06-05 | 2014-12-31 |
| Value | 349 | 349 | 354 | 354 | 354 | 569 | 572 | 771 | 772 | 770 | 768 | 635 | 635 | 635 | 628 | 628 | 628 | 627 | 626 | 459 | 459 | 459 | 608 | 608 | 608 | 608 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 27.0 | 26.7 | 25.9 | 25.5 | 27.9 | 39.3 | 38.2 | 45.0 | 46.7 | 47.3 | 44.6 | 48.0 | 48.1 | 48.6 | 47.9 | 48.4 | 55.2 | 54.3 | 52.2 | 54.0 | 53.9 | 53.7 | 60.0 | 57.7 | 58.6 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 214 | 214 | 214 | 214 | 435 | 437 |
| Percentage of Goodwill | 61.4 | 61.4 | 60.4 | 60.4 | 76.4 | 76.5 |
| Percentage of Assets | 16.6 | 16.4 | 15.6 | 16.9 | 30.0 | 29.2 |
| Percentage of Assets evh:EvolentHealthServicesSegment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2016-12-31 |
| Value | 349 | 349 | 348 | 564 | 566 | 766 | 766 | 764 | 762 | 629 | 629 | 629 | 628 | 626 |
| Percentage of Goodwill | 98.4 | 98.4 | 98.4 | 99.0 | 99.0 | 99.3 | 99.3 | 99.3 | 99.3 | 99.1 | 99.1 | 99.1 | 100.0 | 100.0 |
| Percentage of Assets | 25.5 | 25.1 | 27.5 | 38.9 | 37.8 | 44.7 | 46.4 | 46.9 | 44.3 | 47.6 | 47.6 | 48.2 | 47.9 | 52.2 |
| Percentage of Assets evh:ServicesSegment | 0.0 | 0.0 | 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 | 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 | 2016-12-31 |
| Value | 5.705 | 5.705 | 5.705 | 5.705 | 5.705 | 5.705 | 5.705 | 5.705 | 5.705 | 5.826 | 5.826 | 5.826 | 0.0 | 0.0 |
| Percentage of Goodwill | 1.6 | 1.6 | 1.6 | 1.0 | 1.0 | 0.7 | 0.7 | 0.7 | 0.7 | 0.9 | 0.9 | 0.9 | 0.0 | 0.0 |
| Percentage of Assets | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.4 | 0.3 | 0.4 | 0.4 | 0.4 | 0.0 | 0.0 |
| Percentage of Assets evh:TrueHealthSegment | 0.0 | 0.0 | 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 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 214 | 214 | 214 | 431 | 431 |
| Percentage of Goodwill | 60.4 | 60.4 | 60.4 | 75.8 | 75.5 |
| Percentage of Assets | 15.6 | 15.4 | 16.9 | 29.8 | 28.8 |
| Percentage of Assets us-gaap:IncomeApproachValuationTechnique | 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 | 2015-06-05 | 2014-12-31 |
| Value | 252 | 259 | 268 | 275 | 282 | 291 | 308 | 317 | 326 | 336 | 335 | 230 | 236 | 242 | 241 | 249 | 254 | 254 | 258 | 162 | 165 | 168 | 163 | 165 | 168 | 168 | 0.0 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 19.5 | 19.9 | 19.6 | 19.8 | 22.3 | 20.1 | 20.6 | 18.5 | 19.8 | 20.6 | 19.5 | 17.4 | 17.9 | 18.6 | 18.4 | 19.2 | 22.4 | 22.0 | 21.6 | 19.1 | 19.4 | 19.6 | 16.1 | 15.7 | 16.2 | 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 | 2015-05-31 | 2014-12-31 |
| Value | 252 | 259 | 268 | 275 | 282 | 291 | 308 | 317 | 326 | 336 | 335 | 230 | 236 | 242 | 241 | 249 | 254 | 254 | 258 | 162 | 165 | 168 | 163 | 165 | 168 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 |
| Percentage of Assets | 19.5 | 19.9 | 19.6 | 19.8 | 22.3 | 20.1 | 20.6 | 18.5 | 19.8 | 20.6 | 19.5 | 17.4 | 17.9 | 18.6 | 18.4 | 19.2 | 22.4 | 22.0 | 21.6 | 19.1 | 19.4 | 19.6 | 16.1 | 15.7 | 16.2 | 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 |
| Value | 0.369 | 0.419 | 0.47 | 0.519 | 0.57 | 0.62 | 0.714 | 1.094 | 1.535 | 4.199 |
| Percentage of FiniteLivedIntangibleAssetsNet | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.6 | 1.6 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.3 |
| Percentage of Assets evh:BelowMarketLeases | 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 |
| Value | 7.599 | 8.339 | 8.195 | 8.935 | 9.675 | 10 | 9.405 | 9.175 | 9.77 | 10 | 10 | 1.955 | 2.07 | 2.185 |
| Percentage of FiniteLivedIntangibleAssetsNet | 3.0 | 3.2 | 3.1 | 3.2 | 3.4 | 3.6 | 3.0 | 2.9 | 3.0 | 3.1 | 3.3 | 0.8 | 0.9 | 0.9 |
| Percentage of Assets | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.7 | 0.6 | 0.5 | 0.6 | 0.6 | 0.6 | 0.1 | 0.2 | 0.2 |
| Percentage of Assets us-gaap:ContractBasedIntangibleAssets | 0.0 | 0.0 | 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 |
| Value | 213 | 217 | 222 | 226 | 230 | 233 | 246 | 250 | 254 | 258 | 252 | 183 | 185 | 188 | 185 | 187 | 189 | 192 | 194 | 120 | 122 | 123 | 117 | 118 | 119 |
| Percentage of FiniteLivedIntangibleAssetsNet | 84.8 | 83.7 | 83.2 | 82.3 | 81.4 | 80.2 | 80.0 | 79.0 | 77.9 | 76.9 | 75.2 | 79.4 | 78.4 | 77.4 | 76.8 | 75.2 | 74.6 | 75.6 | 75.1 | 74.2 | 73.8 | 73.4 | 71.8 | 71.5 | 71.1 |
| Percentage of Assets | 16.5 | 16.6 | 16.3 | 16.3 | 18.1 | 16.1 | 16.5 | 14.6 | 15.4 | 15.9 | 14.6 | 13.8 | 14.0 | 14.4 | 14.1 | 14.4 | 16.7 | 16.6 | 16.2 | 14.2 | 14.3 | 14.4 | 11.5 | 11.2 | 11.5 |
| 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 | 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 |
| Value | 14 | 16 | 19 | 22 | 24 | 28 | 33 | 37 | 42 | 46 | 51 | 28 | 31 | 34 | 37 | 41 | 43 | 40 | 42 | 24 | 25 | 26 | 27 | 28 | 29 |
| Percentage of FiniteLivedIntangibleAssetsNet | 5.6 | 6.5 | 7.2 | 8.0 | 8.7 | 9.8 | 10.8 | 11.9 | 12.9 | 13.9 | 15.3 | 12.4 | 13.4 | 14.4 | 15.7 | 16.6 | 17.2 | 16.0 | 16.5 | 14.9 | 15.3 | 15.7 | 16.9 | 17.2 | 17.6 |
| Percentage of Assets | 1.1 | 1.3 | 1.4 | 1.6 | 1.9 | 2.0 | 2.2 | 2.2 | 2.6 | 2.9 | 3.0 | 2.2 | 2.4 | 2.7 | 2.9 | 3.2 | 3.8 | 3.5 | 3.6 | 2.9 | 3.0 | 3.1 | 2.7 | 2.7 | 2.9 |
| Percentage of Assets us-gaap:DevelopedTechnologyRights | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 19 | 15 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 |
| Percentage of FiniteLivedIntangibleAssetsNet | 6.5 | 6.4 | 6.4 | 6.3 | 6.3 | 6.2 | 6.0 | 5.9 | 5.8 | 5.8 | 5.9 | 6.9 | 6.8 | 6.7 | 6.9 | 6.7 | 6.7 | 6.8 | 6.8 | 10.9 | 10.9 | 10.8 | 11.3 | 11.3 | 11.3 |
| Percentage of Assets | 1.3 | 1.3 | 1.2 | 1.2 | 1.4 | 1.2 | 1.2 | 1.1 | 1.2 | 1.2 | 1.1 | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 | 1.5 | 1.5 | 1.5 | 2.1 | 2.1 | 2.1 | 1.8 | 1.8 | 1.8 |
| Percentage of Assets us-gaap:TradeNames | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 51 | 53 | 57 | 60 | 66 | 63 | 72 | 75 | 76 | 63 | 0.0 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 4.0 | 4.1 | 4.2 | 4.3 | 5.2 | 4.3 | 4.8 | 4.4 | 4.6 | 3.9 | 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 | 2014-12-31 |
| Value | 39 | 78 | 32 | 32 | 73 | 80 | 37 | 120 | 28 | 39 | 146 | 30 | 34 | 22 | 42 | 27 | 26 | 39 | 43 | 14 | 12 | 17 | 16 | 12 | 13 | 0.0 |
| Percentage of AccountsPayableCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 3.1 | 6.0 | 2.3 | 2.3 | 5.8 | 5.5 | 2.5 | 7.0 | 1.7 | 2.4 | 8.5 | 2.3 | 2.6 | 1.7 | 3.3 | 2.1 | 2.3 | 3.4 | 3.7 | 1.7 | 1.5 | 2.0 | 1.6 | 1.2 | 1.3 | 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 |
| Value | 1.923 | 1.898 | 2.509 | 2.521 | 7.132 | 6.867 | 6.429 | 1.564 |
| Percentage of AccountsPayableCurrent | 4.8 | 2.4 | 7.8 | 7.8 | 9.7 | 8.6 | 17.1 | 1.1 |
| Percentage of Assets | 0.1 | 0.1 | 0.2 | 0.2 | 0.6 | 0.5 | 0.4 | 0.1 |
| Percentage of Assets srt:AffiliatedEntity | 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 | 2014-12-31 |
| Value | 52 | 61 | 84 | 76 | 35 | 28 | 33 | 41 | 52 | 53 | 48 | 47 | 39 | 37 | 29 | 21 | 25 | 22 | 29 | 11 | 8.513 | 7.551 | 6.047 | 21 | 20 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 4.0 | 4.7 | 6.2 | 5.5 | 2.8 | 1.9 | 2.2 | 2.4 | 3.2 | 3.3 | 2.8 | 3.6 | 3.0 | 2.9 | 2.3 | 1.6 | 2.3 | 1.9 | 2.4 | 1.4 | 1.0 | 0.9 | 0.6 | 2.1 | 1.9 | 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 |
| Value | 1.22 | 0.988 | 1.52 | 1.062 | 4.267 | 5.322 | 2.583 | 0.798 |
| Percentage of AccruedLiabilitiesCurrent | 2.3 | 1.6 | 1.8 | 1.4 | 12.1 | 18.9 | 7.7 | 1.6 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.3 | 0.4 | 0.2 | 0.0 |
| Percentage of Assets srt:AffiliatedEntity | 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 | 2018-01-01 | 2017-12-31 |
| Value | 13 | 13 | 14 | 12 | 13 | 17 | 19 | 22 | 26 | 22 | 20 | 22 | 29 | 26 | 24 |
| Percentage of ContractWithCustomerLiabilityCurrent | 100.0 | 100.0 | 100.0 | 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 | 1.0 | 1.0 | 1.0 | 0.9 | 1.0 | 1.2 | 1.3 | 1.3 | 1.6 | 1.4 | 1.2 | 1.7 | 2.3 | 0.0 | 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 | 2014-12-31 |
| Value | 403 | 414 | 401 | 365 | 245 | 236 | 192 | 259 | 172 | 163 | 269 | 139 | 136 | 116 | 132 | 105 | 101 | 104 | 131 | 65 | 56 | 52 | 59 | 89 | 60 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 31.2 | 31.7 | 29.3 | 26.3 | 19.3 | 16.3 | 12.9 | 15.2 | 10.5 | 10.0 | 15.6 | 10.5 | 10.3 | 9.0 | 10.1 | 8.1 | 8.9 | 9.0 | 11.0 | 7.7 | 6.7 | 6.1 | 5.9 | 8.5 | 5.8 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 54 | 29 | 202 | 267 |
| Percentage of LiabilitiesCurrent | 13.7 | 8.0 | 82.5 | 138.7 |
| Percentage of Assets | 4.0 | 2.1 | 15.9 | 17.8 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 26 | 26 | 26 |
| Percentage of LongTermDebtCurrent | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.1 | 2.0 | 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 | 2018-12-31 |
| Value | 7265000.0 | 7539000.0 | 7357000.0 | 7438000.0 | 7474000.0 | 5785000.0 | 6269000.0 | 0 |
| Percentage of OperatingLeaseLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 0.6 | 0.6 | 0.5 | 0.5 | 0.6 | 0.4 | 0.4 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 20 | 17 | 16 | 57 |
| Percentage of LiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.5 | 1.2 | 1.3 | 3.8 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 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 | 285 | 299 | 296 | 293 | 227 | 225 | 223 | 221 | 122 | 121 | 121 | 121 | 121 | 120 | 120 | 120 | 0.0 |
| Percentage of LongTermDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 20.5 | 23.6 | 20.4 | 19.6 | 13.3 | 13.7 | 13.7 | 12.8 | 9.2 | 9.2 | 9.3 | 9.2 | 9.3 | 10.6 | 10.5 | 10.0 | 0.0 |
| Period End | 2020-08-31 |
| Value | 78 |
| Percentage of LongTermDebt | 0.0 |
| Percentage of Assets | 0.0 |
| Percentage of Assets evh:SeniorConvertibleNotesDue2024 us-gaap:SeniorNotes | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 1.4 | 1.4 | 1.4 | 1.0 |
| Percentage of LongTermDebt | 0.5 | 0.5 | 0.5 | 0.3 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of Assets us-gaap:LineOfCredit us-gaap:EquityMethodInvestee | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 206 | 202 | 263 | 293 |
| Percentage of LongTermDebtNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 16.0 | 15.5 | 19.2 | 19.6 |
| 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 | 0.957 | 1.085 | 0.728 | 1.39 | 1.326 | 2.13 | 1.942 | 24 | 25 | 24 | 25 | 1.725 | 1.533 | 2.437 |
| Percentage of DeferredIncomeTaxLiabilitiesNet | 100.0 | 100.0 | 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 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 1.4 | 1.6 | 1.5 | 1.5 | 0.1 | 0.1 | 0.2 |
| 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 | 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 | 2014-12-31 |
| Value | 24 | 0.0 | 0.0 | 6.689 | 15 | 16 | 50 | 45 | 10 | 10 | 11 | 35 | 35 | 34 | 146 | 209 | 197 | 230 | 234 | 285 | 289 | 294 | 0.0 |
| Percentage of MinorityInterest | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 1.8 | 0.0 | 0.0 | 0.4 | 0.9 | 1.0 | 3.1 | 2.6 | 0.8 | 0.8 | 0.9 | 2.7 | 2.8 | 3.0 | 12.7 | 17.5 | 23.2 | 27.0 | 27.3 | 28.1 | 27.4 | 28.3 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 2.671 | 3.638 | 97 | 70 |
| Percentage of MinorityInterest | 0.0 | 14.6 | 0.0 | 1054.5 |
| Percentage of Assets | 0.2 | 0.3 | 7.7 | 4.7 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 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 |
| Value | 24 | 0.0 | 0.0 | 6.689 | 15 | 16 | 50 | 45 | 10 | 10 | 11 | 35 | 35 | 34 | 146 | 209 | 197 | 230 | 234 | 285 | 289 | 294 | 0.0 | 0.0 |
| Percentage of MinorityInterest | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Percentage of Assets | 1.8 | 0.0 | 0.0 | 0.4 | 0.9 | 1.0 | 3.1 | 2.6 | 0.8 | 0.8 | 0.9 | 2.7 | 2.8 | 3.0 | 12.7 | 17.5 | 23.2 | 27.0 | 27.3 | 28.1 | 27.4 | 28.3 | 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 |
| 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 | 2014-12-31 |
| Value | 9.784 | 10 | 22 | 20 | 10 | 7.664 | 11 | 6.553 | 10 | 10 | 17 | 10 | 10 | 11 | 9.861 | 9.982 | 10 | 14 | 14 | 7.997 | 7.972 | 7.927 | 0.111 | 0.067 | 0.0 |
| 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 | 0.0 |
| Percentage of Assets | 0.8 | 0.8 | 1.6 | 1.5 | 0.8 | 0.5 | 0.8 | 0.4 | 0.6 | 0.6 | 1.0 | 0.8 | 0.8 | 0.9 | 0.8 | 0.8 | 0.9 | 1.2 | 1.2 | 0.9 | 0.9 | 0.9 | 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 |
| Value | 58 | 60 | 62 | 64 | 66 | 60 | 68 | 0.0 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 4.5 | 4.6 | 4.6 | 4.7 | 5.3 | 4.2 | 4.6 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 8645000.0 | 8650000.0 | 9562000.0 | 9647000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.7 | 0.7 | 0.7 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 8378000.0 | 8378000.0 | 9012000.0 | 9105000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.6 | 0.6 | 0.7 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 8145000.0 | 8145000.0 | 8733000.0 | 8833000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.6 | 0.6 | 0.6 | 0.6 |
| Period End | 2020-12-31 |
| Value | 8265000.0 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 |
| Percentage of Assets | 0.6 |
| Period End | 2020-12-31 |
| Value | 47 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 |
| Percentage of Assets | 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 |
| Value | 65 | 67 | 69 | 72 | 74 | 66 | 75 | 75 | 75 | 60 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 5.1 | 5.2 | 5.1 | 5.2 | 5.9 | 4.6 | 5.0 | 4.4 | 4.6 | 3.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 88 | 91 | 94 | 98 | 101 | 92 | 103 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 6.9 | 7.0 | 6.9 | 7.1 | 8.0 | 6.4 | 6.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 1.835 | 2.083 | 2.318 | 2.514 | 2.667 | 2.883 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 2.1 | 2.3 | 2.4 | 2.6 | 2.6 | 3.1 |
| Percentage of Assets | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of Assets country:IN | 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 |
| Value | 1.015 | 1.287 | 1.555 | 1.824 | 2.093 | 2.328 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 1.1 | 1.4 | 1.6 | 1.9 | 2.1 | 2.5 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 |
| Percentage of Assets stpr:CA | 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 |
| Value | 42 | 43 | 44 | 45 | 46 | 41 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 48.5 | 47.8 | 47.0 | 46.1 | 45.2 | 44.6 |
| Percentage of Assets | 3.3 | 3.4 | 3.3 | 3.3 | 3.6 | 2.8 |
| Percentage of Assets stpr:IL | 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 |
| Value | 37 | 37 | 38 | 39 | 40 | 40 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 41.9 | 41.4 | 40.8 | 40.1 | 39.5 | 44.3 |
| Percentage of Assets | 2.9 | 2.9 | 2.8 | 2.8 | 3.2 | 2.8 |
| Percentage of Assets stpr:VA | 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 |
| Value | 22 | 23 | 25 | 26 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.8 | 1.8 | 1.8 | 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 | 2014-12-31 |
| Value | 614 | 617 | 619 | 629 | 646 | 847 | 922 | 1108 | 1130 | 1100 | 1143 | 1038 | 1041 | 1043 | 1010 | 1019 | 859 | 750 | 702 | 562 | 537 | 541 | 649 | 646 | 654 | -2.07 |
| 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 |
| Percentage of Assets | 47.5 | 47.3 | 45.2 | 45.3 | 50.9 | 58.4 | 61.6 | 64.7 | 68.4 | 67.5 | 66.4 | 78.5 | 78.8 | 79.9 | 77.0 | 78.5 | 75.5 | 65.0 | 58.6 | 66.0 | 63.1 | 63.2 | 63.9 | 61.2 | 62.9 | -5.4 |
| 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 614 | 617 | 619 | 654 | 646 | 847 | 929 | 1124 | 1146 | 1150 | 1189 | 1048 | 1051 | 1054 | 1046 | 1055 | 894 | 896 | 912 | 759 | 768 | 775 | 934 | 936 | 948 | -2.07 | 13 | 5.201 |
| 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 |
| Percentage of Assets | 47.5 | 47.3 | 45.2 | 47.0 | 50.9 | 58.4 | 62.0 | 65.6 | 69.4 | 70.6 | 69.1 | 79.3 | 79.6 | 80.8 | 79.7 | 81.3 | 78.6 | 77.7 | 76.0 | 89.3 | 90.1 | 90.6 | 92.0 | 88.6 | 91.2 | -5.4 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 0.872 | 0.868 | 0.859 | 0.858 | 0.855 | 0.855 | 0.846 | 0.838 | 0.838 | 0.794 | 0.792 | 0.784 | 0.776 | 0.77 | 0.747 | 0.747 | 0.658 | 0.57 | 0.506 | 0.448 | 0.426 | 0.426 | 0.415 | 0.415 | 0.415 | 0.001 | 0.0 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 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 | 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 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 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 |
| 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 1242 | 1236 | 1229 | 1224 | 1183 | 1180 | 1173 | 1161 | 1158 | 1096 | 1093 | 971 | 961 | 953 | 924 | 919 | 747 | 621 | 555 | 397 | 361 | 357 | 342 | 335 | 330 | 23 | 13 | 25 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 202.4 | 200.4 | 198.4 | 187.1 | 183.0 | 139.3 | 126.3 | 103.3 | 101.0 | 95.3 | 91.9 | 92.6 | 91.4 | 90.4 | 88.3 | 87.1 | 83.6 | 69.3 | 60.9 | 52.3 | 47.1 | 46.0 | 36.6 | 35.8 | 34.9 | -1146.5 | 104.2 | 495.7 |
| Percentage of Assets | 96.1 | 94.7 | 89.7 | 88.0 | 93.2 | 81.4 | 78.4 | 67.8 | 70.1 | 67.3 | 63.5 | 73.4 | 72.7 | 73.0 | 70.4 | 70.8 | 65.7 | 53.8 | 46.3 | 46.7 | 42.4 | 41.7 | 33.7 | 31.7 | 31.8 | 62.0 | 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 |
| 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 | 2016-12-31 | 2015-12-31 |
| Value | -0.367 | -0.309 | -0.278 | -0.32 | -0.391 | -0.387 | -0.234 | -0.215 | -0.147 | -0.158 | -0.182 | -0.264 | -0.148 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -0.1 | -0.1 | -0.0 | -0.0 | -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 |
| 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 |
| Percentage of Assets us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 24 | 0.0 | 0.0 | 6.689 | 15 | 16 | 50 | 45 | 10 | 10 | 11 | 35 | 35 | 34 | 146 | 209 | 230 | 234 | 285 | 289 | 294 | 0.0 | 0.0 | 0.0 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 3.8 | 0.0 | 0.0 | 0.7 | 1.4 | 1.4 | 4.4 | 3.8 | 1.0 | 1.0 | 1.1 | 3.4 | 3.4 | 3.9 | 16.3 | 23.0 | 30.0 | 30.2 | 30.5 | 30.9 | 31.0 | -0.0 | 0.0 | 0.0 |
| Percentage of Assets | 1.8 | 0.0 | 0.0 | 0.4 | 0.9 | 1.0 | 3.1 | 2.6 | 0.8 | 0.8 | 0.9 | 2.7 | 2.8 | 3.0 | 12.7 | 17.5 | 27.0 | 27.3 | 28.1 | 27.4 | 28.3 | 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 |
| 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 |
| Value | 614 | 617 | 619 | 629 | 646 | 847 | 922 | 1143 | 1010 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 96.2 | 100.0 | 100.0 | 99.3 | 96.2 | 96.6 |
| Percentage of Assets | 47.5 | 47.3 | 45.2 | 45.3 | 50.9 | 58.4 | 61.6 | 66.4 | 77.0 |
| Percentage of Assets us-gaap:Parent | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | -608.092 | -598.985 | -589.178 | -574.553 | -537.205 | -333.684 | -251.962 | -53.866 | -28.345 | 3.27 | 50 | 66 | 79 | 89 | 85 | 99 | 111 | 128 | 146 | 164 | 175 | 183 | 306 | 310 | 322 | -25.806 | -0.56 | -20.583 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -99.0 | -97.0 | -95.1 | -87.8 | -83.0 | -39.4 | -27.1 | -4.8 | -2.5 | 0.3 | 4.2 | 6.4 | 7.5 | 8.4 | 8.2 | 9.4 | 12.5 | 14.3 | 16.1 | 21.6 | 22.8 | 23.7 | 32.8 | 33.2 | 34.0 | 1246.7 | -4.2 | -395.8 |
| Percentage of Assets | -47.0 | -45.9 | -43.0 | -41.3 | -42.3 | -23.0 | -16.8 | -3.1 | -1.7 | 0.2 | 2.9 | 5.0 | 6.0 | 6.8 | 6.5 | 7.6 | 9.8 | 11.1 | 12.2 | 19.3 | 20.5 | 21.5 | 30.2 | 29.4 | 31.0 | -67.4 | 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 |
| 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 | 2014-12-31 |
| Value | 872000.0 | 868000.0 | 859000.0 | 858000.0 | 855000.0 | 855000.0 | 846000.0 | 838000.0 | 838000.0 | 794000.0 | 792000.0 | 784000.0 | 776000.0 | 770000.0 | 747000.0 | 747000.0 | 658000.0 | 570000.0 | 506000.0 | 448000.0 | 426000.0 | 426000.0 | 415000.0 | 415000.0 | 415000.0 | 1000.0 |
| 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 |
| Percentage of Assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 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 |
| 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 | 2014-12-31 |
| Value | 1242 | 1236 | 1229 | 1224 | 1183 | 1180 | 1173 | 1161 | 1158 | 1096 | 1093 | 971 | 961 | 953 | 924 | 919 | 747 | 621 | 555 | 397 | 361 | 357 | 342 | 335 | 330 | 23 |
| Percentage of AdditionalPaidInCapital | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 96.1 | 94.7 | 89.7 | 88.0 | 93.2 | 81.4 | 78.4 | 67.8 | 70.1 | 67.3 | 63.5 | 73.4 | 72.7 | 73.0 | 70.4 | 70.8 | 65.7 | 53.8 | 46.3 | 46.7 | 42.4 | 41.7 | 33.7 | 31.7 | 31.8 | 62.0 |
| 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 | 2014-12-31 |
| Value | -608.092 | -598.985 | -589.178 | -574.553 | -537.205 | -333.684 | -251.962 | -53.866 | -28.345 | 3.27 | 50 | 66 | 79 | 89 | 85 | 99 | 111 | 128 | 146 | 164 | 175 | 183 | 306 | 310 | 322 | -25.806 |
| 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 |
| Percentage of Assets | -47.0 | -45.9 | -43.0 | -41.3 | -42.3 | -23.0 | -16.8 | -3.1 | -1.7 | 0.2 | 2.9 | 5.0 | 6.0 | 6.8 | 6.5 | 7.6 | 9.8 | 11.1 | 12.2 | 19.3 | 20.5 | 21.5 | 30.2 | 29.4 | 31.0 | -67.4 |
| 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 |
| Value | -367000.0 | -309000.0 | -278000.0 | -320000.0 | -391000.0 | -387000.0 | -234000.0 | -215000.0 | -147000.0 | -158000.0 | -182000.0 | -264000.0 | -148000.0 | 0 | 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 | 0.0 | 0.0 |
| 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 |
| 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 | 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 | 2014-12-31 |
| Value | 24 | 0.0 | 0.0 | 6.689 | 15 | 16 | 50 | 45 | 10 | 10 | 11 | 35 | 35 | 34 | 146 | 209 | 197 | 230 | 234 | 285 | 289 | 294 | 0.0 |
| Percentage of MinorityInterest | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 1.8 | 0.0 | 0.0 | 0.4 | 0.9 | 1.0 | 3.1 | 2.6 | 0.8 | 0.8 | 0.9 | 2.7 | 2.8 | 3.0 | 12.7 | 17.5 | 23.2 | 27.0 | 27.3 | 28.1 | 27.4 | 28.3 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 2.671 | 3.638 | 97 | 70 |
| Percentage of MinorityInterest | 0.0 | 14.6 | 0.0 | 1054.5 |
| Percentage of Assets | 0.2 | 0.3 | 7.7 | 4.7 |
| Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 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 |
| Value | 24 | 0.0 | 0.0 | 6.689 | 15 | 16 | 50 | 45 | 10 | 10 | 11 | 35 | 35 | 34 | 146 | 209 | 197 | 230 | 234 | 285 | 289 | 294 | 0.0 | 0.0 |
| Percentage of MinorityInterest | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Percentage of Assets | 1.8 | 0.0 | 0.0 | 0.4 | 0.9 | 1.0 | 3.1 | 2.6 | 0.8 | 0.8 | 0.9 | 2.7 | 2.8 | 3.0 | 12.7 | 17.5 | 23.2 | 27.0 | 27.3 | 28.1 | 27.4 | 28.3 | 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 |
| 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 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 4.139 | 3.352 | 4.362 | 4.152 | 4.661 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 2.303 | 4.799 | 4.609 | 4.436 | 4.194 | 4.382 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 4.139 | 3.352 | 4.362 | 4.152 | 4.661 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 2.303 | 4.799 | 4.609 | 4.436 | 4.194 | 4.382 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 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 |
| Percentage of Assets us-gaap:Parent | 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 |
| Value | -24.247 | -48.163 | -12.851 | -20.499 | 37 | -20.541 | 13 | -16.59 | -13.533 | -25.709 | -24.968 | 22 | 6.701 | -24.705 | 6.035 | 10 | -9.947 | -34.765 | -21.505 | 7.913 | -1.114 | -20.804 | -6.311 | -6.349 | -5.808 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -10.9 | -22.4 | -4.7 | -7.7 | 15.8 | -8.3 | 5.6 | -7.5 | -7.0 | -13.0 | -12.9 | 14.9 | 4.6 | -17.7 | 5.3 | 9.9 | -9.3 | -32.7 | -24.4 | 13.1 | -2.0 | -42.1 | -13.7 | -15.7 | -55.8 | 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 |
| Value | -5.571 | 45 | -2.225 | 281 | -7.575 | -10.807 | -79.174 | -11.644 | -65.338 | -25.478 | -135.442 | -5.557 | -6.691 | -12.685 | -29.268 | 9.264 | 3.117 | 4.622 | -74.974 | -4.357 | -4.811 | -13.655 | -54.819 | -4.915 | 16 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -2.5 | 21.4 | -0.8 | 106.5 | -3.2 | -4.4 | -33.5 | -5.3 | -34.0 | -12.9 | -70.1 | -3.7 | -4.6 | -9.1 | -25.7 | 8.6 | 2.9 | 4.4 | -85.2 | -7.2 | -8.5 | -27.6 | -119.0 | -12.2 | 154.1 | 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 |
| Value | -35.503 | -55.584 | -23.916 | -13.856 | -6.664 | 32 | -11.246 | 96 | -11.406 | -109.665 | 281 | -4.27 | 17 | -21.607 | -4.013 | 167 | 2.51 | -0.125 | 121 | 1.083 | -0.229 | 0.025 | -1.301 | 0.054 | 209 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -16.0 | -25.8 | -8.8 | -5.2 | -2.8 | 13.2 | -4.8 | 44.0 | -5.9 | -55.5 | 146.0 | -2.8 | 12.4 | -15.5 | -3.5 | 154.9 | 2.3 | -0.1 | 137.8 | 1.8 | -0.4 | 0.1 | -2.8 | 0.1 | 2008.1 | 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 |
| Value | -65.376 | -57.795 | -38.97 | 247 | 23 | 1.267 | -77.222 | 68 | -90.287 | -160.871 | 121 | 12 | 17 | -59.001 | -0.562 | 181 | -17.316 | -38.769 |
| 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 RevenueFromContractWithCustomerExcludingAssessedTax | -29.4 | -26.9 | -14.3 | 93.5 | 9.8 | 0.5 | -32.6 | 31.2 | -47.0 | -81.3 | 62.9 | 8.4 | 12.4 | -42.2 | -0.5 | 168.6 | -16.2 | -36.5 |
| 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 |
| Value | 4.467 | 4.37 | 4.687 | 4.014 | 3.07 | 3.009 | 2.416 | 2.354 | 2.321 | 2.279 | 1.767 | 0.229 | 0.23 | 0.229 | 0.229 | 0.229 | 0.227 | 0.229 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of AmortizationOfFinancingCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.049 | 0.049 | 0.0 | 0.1 | 0.3 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Percentage of AmortizationOfFinancingCosts | 1.1 | 1.1 | 0.0 | 2.5 | 9.8 | 6.6 | 8.3 | 8.5 | 12.9 | 8.8 | 11.3 | 87.3 | 87.0 | 87.3 | 87.3 | 87.3 | 88.1 | 87.3 |
| 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 |
| Value | 14 | 15 | 14 | 14 | 15 | 16 | 15 | 15 | 15 | 14 | 14 | 10 | 10 | 9.496 | 11 | 7.717 | 6.904 | 6.615 | 6.496 | 3.745 | 3.612 | 3.371 | 3.126 | 3.056 | 0.984 | 0.0 | 0.0 | 0.0 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.509 | 9.395 | 3.941 | -12.084 | 0.622 | 11 | -1.487 | -5.018 | 1.229 | -0.204 | 1.147 | 6.793 | -2.676 | 2.334 | -5.028 | 13 | -6.736 | 4.222 | -2.679 | -0.717 | -0.079 | -2.896 | 1.691 | 2.186 | -1.113 | 0.0 | 0.0 | 0.0 |
| Percentage of IncreaseDecreaseInAccountsPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -24.247 | -48.163 | -12.851 | -20.499 | 37 | -20.541 | 13 | -16.59 | -13.533 | -25.709 | -24.968 | 22 | 6.701 | -24.705 | 6.035 | 10 | -9.947 | -34.765 | -21.505 | 7.913 | -1.114 | -20.804 | -6.311 | -6.349 | -5.808 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -10.9 | -22.4 | -4.7 | -7.7 | 15.8 | -8.3 | 5.6 | -7.5 | -7.0 | -13.0 | -12.9 | 14.9 | 4.6 | -17.7 | 5.3 | 9.9 | -9.3 | -32.7 | -24.4 | 13.1 | -2.0 | -42.1 | -13.7 | -15.7 | -55.8 | 0.0 | 0.0 | 0.0 |
| Period End | 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 |
| Value | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.16 | -12.588 | -16.905 | -18.012 | -17.407 | -11.208 | -8.387 | -122.812 | -4.119 | -11.98 | 359 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 | -19.8 | -18.6 | -14.8 | -248.4 | -8.9 | -29.6 | 3456.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 0.957 | 11 | -25.327 | 14 | 8.272 | -0.075 |
| Percentage of NetIncomeLoss | -6.5 | -29.8 | 12.4 | -7.4 | -32.4 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | 4.2 | -10.6 | 6.2 | 3.8 | -0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 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 |
| Value | -9.107 | -9.807 | -13.803 | -38.17 | -203.521 | -78.752 | -199.293 | -25.738 | -31.9 | -48.649 | -17.54 | -12.555 | -10.031 | -14.065 | -13.791 | -13.129 | -19.698 | -23.149 | -25.193 | -15.775 | -11.999 | -173.912 | -8.267 | -17.088 | 356 | -11.319 | -10.698 | -3.167 | -5.939 | -5.442 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.1 | -14.4 | -85.3 | -31.8 | -84.3 | -11.7 | -16.6 | -24.6 | -9.1 | -8.4 | -7.0 | -10.1 | -12.1 | -12.2 | -18.4 | -21.8 | -28.6 | -26.2 | -21.2 | -351.7 | -17.9 | -42.3 | 3423.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 6.08 | 14 | -39.263 | 53 | 8.358 | -0.34 |
| Percentage of ProfitLoss | -44.0 | -39.2 | 19.3 | -26.7 | -32.5 | 1.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.2 | 5.7 | -16.5 | 22.5 | 3.8 | -0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 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 | -0.822 | -1.197 | -0.217 | -0.285 | -1.91 | -0.853 | -0.126 | -0.115 | -0.439 | -0.631 | -0.541 | -2.793 | -5.137 |
| Percentage of ProfitLoss | 2.2 | 0.6 | 0.8 | 0.9 | 3.9 | 4.9 | 1.0 | 1.1 | 3.1 | 4.6 | 4.1 | 14.2 | 22.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -0.3 | -0.5 | -0.1 | -0.1 | -1.0 | -0.4 | -0.1 | -0.1 | -0.3 | -0.6 | -0.5 | -2.6 | -4.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 106.0 | 97.8 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent | 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 |
| Value | -9.107 | -9.807 | -14.625 | -37.348 | -203.521 | -78.752 | -198.096 | -25.521 | -31.615 | -46.739 | -16.687 | -12.429 | -9.916 | -13.626 | -13.159 | -12.588 | -16.906 | -18.012 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 106.0 | 97.8 | 100.0 | 100.0 | 99.4 | 99.2 | 99.1 | 96.1 | 95.1 | 99.0 | 98.9 | 96.9 | 95.4 | 95.9 | 85.8 | 77.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -4.1 | -4.6 | -5.4 | -14.1 | -85.3 | -31.8 | -83.8 | -11.6 | -16.5 | -23.6 | -8.6 | -8.3 | -6.9 | -9.8 | -11.6 | -11.7 | -15.8 | -17.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax 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 |
| 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 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 0.573 | 5.758 | 4.75 | 4.537 | 5.049 | 4.047 | 4.718 | 3.795 | 4.265 | 5.708 | 5.36 | 5.104 | 4.76 | 4.331 | 5.077 | 4.436 | 4.194 | 4.382 | 6.154 | 0.0 | 0.0 | 0.0 |
| 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 | 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 |
| Value | -5.571 | 45 | -2.225 | 281 | -7.575 | -10.807 | -79.174 | -11.644 | -65.338 | -25.478 | -135.442 | -5.557 | -6.691 | -12.685 | -29.268 | 9.264 | 3.117 | 4.622 | -74.974 | -4.357 | -4.811 | -13.655 | -54.819 | -4.915 | 16 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -2.5 | 21.4 | -0.8 | 106.5 | -3.2 | -4.4 | -33.5 | -5.3 | -34.0 | -12.9 | -70.1 | -3.7 | -4.6 | -9.1 | -25.7 | 8.6 | 2.9 | 4.4 | -85.2 | -7.2 | -8.5 | -27.6 | -119.0 | -12.2 | 154.1 | 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 |
| Value | -35.503 | -55.584 | -23.916 | -13.856 | -6.664 | 32 | -11.246 | 96 | -11.406 | -109.665 | 281 | -4.27 | 17 | -21.607 | -4.013 | 167 | 2.51 | -0.125 | 121 | 1.083 | -0.229 | 0.025 | -1.301 | 0.054 | 209 | 0.0 | 0.0 | 0.0 |
| 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 | 0.0 | 0.0 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -16.0 | -25.8 | -8.8 | -5.2 | -2.8 | 13.2 | -4.8 | 44.0 | -5.9 | -55.5 | 146.0 | -2.8 | 12.4 | -15.5 | -3.5 | 154.9 | 2.3 | -0.1 | 137.8 | 1.8 | -0.4 | 0.1 | -2.8 | 0.1 | 2008.1 | 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 |
| Value | -1.0 | -5.8 | 0 | -1.3 | 0.019 | -0.003 | 0.068 | 0.032 | -0.046 | 0.01 | 0 | -0.009 | 0.01 | -0.001 | 0.052 | 0.116 | 0.034 | -0.018 | 0.037 | 0.016 | 0.03 | 0.006 | -0.014 | 0.006 | 0.076 | 0 | 0 | 0 | 0 |
| Percentage of EffectiveIncomeTaxRateContinuingOperations | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 4070000.0 | 4828000.0 | 5089000.0 | 5951000.0 | 6005300.0 | 5689900.0 | 4144400.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 268000.0 | 268000.0 | 268000.0 | 268000.0 | 267770.0 | 0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 6.6 | 5.6 | 5.3 | 4.5 | 4.5 | 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 | 4800000.0 | 4800000.0 | 4800000.0 | 4800000.0 | 4900000.0 | 5067900.0 | 4156400.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 117.9 | 99.4 | 94.3 | 80.7 | 81.6 | 89.1 | 100.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 2800000.0 | 2800000.0 | 3300000.0 | 2500000.0 | 1656100.0 | 673780.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 68.8 | 58.0 | 64.8 | 42.0 | 27.6 | 11.8 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 9.32 | 9.44 | 9.82 | 8.38 | 6.44 | 6.03 | 3.84 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 10.27 | 10.27 | 10.27 | 10.27 | 10270.0 | 0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | 110.2 | 108.8 | 104.6 | 122.6 | 159472.0 | 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 | 0.728 | 1.942 | 25 | 2.437 | 20 | 21 | 0.0 |
| Percentage of DeferredTaxLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 102 | 123 | 45 | 2.086 | 41 | 28 | 28 |
| Percentage of DeferredTaxAssetsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 678000.0 | 800000.0 | 753000.0 | 934000.0 | 762000.0 | 0 | 0 | 0 |
| Percentage of UnrecognizedTaxBenefits | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 89 | 50 | 37 | 53 | 26 | 19 | 6.915 |
| Percentage of DeferredTaxAssetsValuationAllowance | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 0 |
| Percentage of AccountsReceivableAllowanceForCreditLossIncreaseFromAcquisitions | 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 |
| Value | 13 | 14 | 16 | 12 | 9.039 | 3.627 | 8.151 | 3.333 | -7.674 | -14.778 | 5.63 | 4.797 | 4.885 | 7.913 | 3.485 | 2.648 | -3.562 | -4.774 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -6.782 | -7.011 | -8.629 | -7.935 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | -50.8 | -47.0 | -95.5 | -218.8 |
| 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 |
| Value | 16 | 12 | 9.039 | 3.627 | 8.151 | 3.333 | -7.674 | -14.778 | 5.63 | 4.797 | 4.885 | 7.913 | 3.485 | 2.648 | -3.562 | -4.774 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 20 | 21 | 19 | 11 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 150.8 | 147.0 | 211.8 | 325.6 |
| 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 |
| Value | 20 | 13 | 10 | 3.876 | 6.49 | 3.139 | -8.797 | -15.499 | 4.636 | 4.065 | 5.643 | 6.966 | 3.485 | 2.648 | -3.562 | -4.774 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 126.8 | 108.7 | 116.4 | 106.9 | 79.6 | 94.2 | 114.6 | 104.9 | 82.3 | 84.7 | 115.5 | 88.0 | 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 | 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 | -4.308 | -1.1 | -1.48 | -0.249 | 1.661 | 0.194 | 1.123 | 0.721 | 0.994 | 0.732 | -0.758 | 0.947 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | -26.8 | -8.7 | -16.4 | -6.9 | 20.4 | 5.8 | -14.6 | -4.9 | 17.7 | 15.3 | -15.5 | 12.0 | 0.0 | 0.0 | -0.0 | -0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 13 | 15 | 12 | 7.043 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 101.9 | 107.2 | 135.0 | 194.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 6.531 | 5.942 | 6.948 | 4.768 |
| Percentage of AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization | 48.9 | 39.9 | 76.9 | 131.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 2000000.0 | 1900000.0 | 1900000.0 | 800000.0 |
| Percentage of AmortizationOfDebtDiscountAndDebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction | 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 | 2400000.0 | 2400000.0 | 2600000.0 | 2300000.0 | 2100000.0 | 2200000.0 | 2300000.0 | 2100000.0 | 2100000.0 | 2000000.0 |
| Percentage of AmortizationOfDebtDiscountAndDebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction | 120.0 | 126.3 | 136.8 | 287.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 500000.0 | 600000.0 | 500000.0 | 600000.0 |
| Percentage of AmortizationOfDebtDiscountAndDebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction | 26.3 | 75.0 | 0.0 | 0.0 |
| Period End | 2020-09-01 |
| Value | 50 |
| Percentage of AssetAcquisitionAccruedLiabilities | 100.0 |
| Period End | 2020-09-01 |
| Value | 50 |
| Percentage of AssetAcquisitionAccruedLiabilities | 100.0 |
| Period End | 2020-09-01 |
| Value | 164 |
| Percentage of AssetAcquisitionAccruedMedicalExpenses | 100.0 |
| Period End | 2020-09-01 |
| Value | 164 |
| Percentage of AssetAcquisitionAccruedMedicalExpenses | 100.0 |
| Period End | 2020-09-01 |
| Value | 159 |
| Percentage of AssetAcquisitionCashAndEquivalents | 100.0 |
| Period End | 2020-09-01 |
| Value | 159 |
| Percentage of AssetAcquisitionCashAndEquivalents | 100.0 |
| Period End | 2020-09-01 |
| Value | 88 |
| Percentage of AssetAcquisitionDebtSecuritiesAvailableForSale | 100.0 |
| Period End | 2020-09-01 |
| Value | 88 |
| Percentage of AssetAcquisitionDebtSecuritiesAvailableForSale | 100.0 |
| Period End | 2020-09-01 |
| Value | 43 |
| Percentage of AssetAcquisitionDebtSecuritiesAvailableForSaleUnsettledSalesReceivables | 100.0 |
| Period End | 2020-09-01 |
| Value | 43 |
| Percentage of AssetAcquisitionDebtSecuritiesAvailableForSaleUnsettledSalesReceivables | 100.0 |
| Period End | 2020-09-01 |
| Value | 50 |
| Percentage of AssetAcquisitionOtherAssets | 100.0 |
| Period End | 2020-09-01 |
| Value | 50 |
| Percentage of AssetAcquisitionOtherAssets | 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 | 196000.0 | 127000.0 | 127000.0 | 2610000.0 | 767000.0 | 440000.0 | 263000.0 | 1061000.0 | 776000.0 | 754000.0 | -4253000.0 | 658000.0 | 578000.0 | 561000.0 | 0 | 0 | 0 | 0 |
| Percentage of CapitalizedContractCostAmortizationPurchaseAccountingAdjustments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-01-31 |
| Value | 20 |
| Percentage of CashReleasedFromEscrow | 100.0 |
| Period End | 2021-01-31 |
| Value | 20 |
| Percentage of CashReleasedFromEscrow | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 24 | 21 | 18 | 23 | 27 | 34 | 36 | 37 | 18 | 16 | 18 | 16 |
| Percentage of ClaimsExpense | 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 | 2021-03-31 | 2020-12-31 |
| Value | 4000.0 | -1000.0 |
| Percentage of ContractWithCustomerAssetIncreaseForContractAssetsRecognized | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 4.23 | 8.821 | 4.0 |
| Percentage of ContractWithCustomerLiabilityCashReceivedInAdvanceOfSatisfactionOfPerformanceObligations | 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 |
| Value | 172 | 157 | 176 | 183 | 165 | 175 | 155 | 131 | 108 | 117 | 112 | 73 | 69 | 71 | 65 | 68 | 67 | 67 | 59 | 33 | 32 | 28 | 24 | 24 | 7.887 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of CostofGoodsandServicesSoldExcludingDepreciationandAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.606 | 0.493 | 1.85 | -0.063 | -2.171 | 3.247 | 6.0 | 8.467 | 6.657 | 7.83 | 2.609 | 2.39 | 1.262 | 3.19 | 5.007 | 5.299 | 5.739 |
| Percentage of CostofGoodsandServicesSoldExcludingDepreciationandAmortization | 0.4 | 0.3 | 1.0 | -0.0 | -1.3 | 1.8 | 3.9 | 6.4 | 6.1 | 6.7 | 2.3 | 3.2 | 1.8 | 4.4 | 7.6 | 7.8 | 8.4 |
| 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 | 119 | 142 | 130 | 133 | 109 | 136 | 128 | 112 | 96 | 65 |
| Percentage of CurrentYearClaimsAndClaimsAdjustmentExpenseIncludingCostOfGoodsAndServicesSoldExcludingDepreciationAndAmortization | 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 | 215 | 4.189 | 91 | 110 |
| Percentage of CurrentYearClaimsAndClaimsAdjustmentExpenseIncludingCostOfGoodsAndServicesSoldExcludingDepreciationAndAmortization | 179.7 | 2.9 | 83.9 | 80.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -95.429 | 104 | -0.384 | 2.519 |
| Percentage of CurrentYearClaimsAndClaimsAdjustmentExpenseIncludingCostOfGoodsAndServicesSoldExcludingDepreciationAndAmortization | -79.7 | 73.0 | -0.4 | 1.8 |
| 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 |
| Value | 104 | 111 | 91 | 112 | 101 | 77 | 54 | 33 |
| Percentage of CurrentYearClaimsAndClaimsAdjustmentExpenseIncludingCostOfGoodsAndServicesSoldExcludingDepreciationAndAmortization | 80.5 | 83.5 | 83.5 | 82.7 | 78.7 | 68.5 | 56.6 | 51.7 |
| 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 |
| Value | 0.0 | 34 | 25 | 21 | 18 | 23 | 27 | 35 | 41 | 31 |
| Percentage of CurrentYearClaimsAndClaimsAdjustmentExpenseIncludingCostOfGoodsAndServicesSoldExcludingDepreciationAndAmortization | 0.0 | 24.0 | 19.5 | 16.5 | 16.5 | 17.3 | 21.3 | 31.5 | 43.4 | 48.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 33 | 18 | 23 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationClaimsExpense | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 1904000.0 | 0 | -6447000.0 |
| Percentage of GainLossOnDispositionOfAssetsOperatingActivities | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 22 |
| Percentage of GainOnTransferOfMembership | 0.0 | 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 | 2.3 | 6.3 | -4.4 | 65 | 71 | 59 | 11 | 11 | 11 | 7.1 | 4.8 | 5.1 | 0.8 | 0.1 | 0.0 | 0.1 | 0.2 | 0.2 |
| Percentage of IncomeLossfromEquityMethodInvestmentsServicesAgreement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 |
| Value | 56 | 63 | 31 | -8.281 | -12.703 | 36 | 0.254 | 3.311 | 4.905 | -14.796 | 13 | -10.285 | 4.151 | 17 |
| Percentage of IncreaseDecreaseInAccountsReceivableAndContractWithCustomerAsset | 100.0 | 100.0 | 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 | 2.301 | 1.69 | 3.454 | 2.443 | 2.177 | 3.326 | 8.075 | 6.872 | 3.545 | 4.565 | 6.611 | 3.806 | 0.407 | 0.355 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of IncreaseDecreaseInCapitalizedContractCostNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 30 | 32 | -19.629 | -49.738 | 5.399 | 27 | 18 | 10 | 3.033 | 2.424 | -1.374 | 0.872 | 2.767 | 6.699 |
| Percentage of IncreaseDecreaseInInsuranceAndPerformanceBasedArrangementsLiabilities | 100.0 | 100.0 | 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 | 2021-03-31 | 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 | -0.771 | -2.292 | -2.273 | 7.703 | -5.92 | -0.823 | 0.506 | 14 | 13 |
| Percentage of IncreaseDecreaseInOperatingLeaseLiability | 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 | -1.781 | -2.84 | -2.441 | -5.873 | 3.075 | -6.695 | -3.596 | -0.943 | 12 | 12 |
| Percentage of IncreaseDecreaseInOperatingLeaseRightofUseAsset | 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 | 2018-12-31 |
| Value | 81000.0 | 472000.0 | 666000.0 | 650000.0 | 650000.0 | 650000.0 | 0 | 0 | 0 |
| Percentage of PaidinKindInterestIncome | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 36 | -39.005 | 3.832 | 28 | 6.963 | -33.678 | 81 | -96.725 |
| Percentage of PaymentsForProceedsFromClaimsProcessingFinancingActivities | 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 | 0 | -3490000.0 | 0 | 2287000.0 |
| Percentage of PaymentsForProceedsFromDisposalOfNonStrategicAssetsAndDivestitureOfDiscontinuedOperationsNet | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-01-08 |
| Value | 9700000.0 |
| Percentage of PaymentsOfMakeWholePremium | 100.0 |
| Period End | 2021-01-08 |
| Value | 9700000.0 |
| Percentage of PaymentsOfMakeWholePremium | 100.0 |
| Period End | 2021-01-08 |
| Value | 9700000.0 |
| Percentage of PaymentsOfMakeWholePremium | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 0.0 | 0.545 | 0.0 | 0.0 | 1.955 | 3.85 | 3.937 | 4.282 |
| Percentage of PolicyholderBenefitsAndClaimsIncurredAssumedExpensesRelatedToClaims | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 2362000.0 | -2194000.0 | -1072000.0 | -5319000.0 |
| Percentage of PremiumsWrittenAndPolicyholderBenefitsAndClaimsIncurredNet | 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 |
| Value | 0.0 | 0.5 | 2.536 | 137 | 2.481 | 0.618 |
| Percentage of ProceedsFromMaturityOfInvestments | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 2537000.0 |
| Percentage of ProceedsFromReinsurance | 100.0 |
| Period End | 2021-03-31 |
| Value | 23 |
| Percentage of ProceedsFromTransferOfMembership | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 2157000.0 | 389000.0 | 427000.0 | -5666000.0 | 7020000.0 |
| Percentage of RightOfUseAssetAcquiredAndDisposedOf | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| 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 | 2018-09-30 | 2017-12-31 | 2017-09-30 |
| Value | 0 | 0 | 2200000.0 | -350000.0 | -246000.0 | 596000.0 | 0 | 0 | 0 | 0 | 0 |
| Percentage of SettlementOfIndemnificationAsset | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 3.653 | 3.706 | 4.231 | 3.164 | 3.703 | 3.508 | 0.573 | 5.758 | 4.75 | 4.537 |
| Percentage of SharebasedCompensationIncludingOnetimeAdjustment | 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 | 1513000.0 | 5000000.0 |
| Percentage of ShareholderAdvisoryServices | 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 | 0.076 | 1.994 | 0.626 | 0.807 | 0.374 | 0.309 | 6.311 | 1.272 | 2.195 | 1.013 | 0.411 | 0.456 | 0.014 | 1.784 | 5.992 | 2.694 | 2.847 | 4.431 |
| Percentage of TransactionCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.0 | 36 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 0.0 | 36 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 0.0 | 36 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 0 | 90000.0 |
| Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs | 0.0 | 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 | 8.731 | 8.845 | 15 | 3.275 | 0.0 | 0.0 | 11 | 22 | 23 | 25 |
| Percentage of AssumedPremiumsWritten | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-08-02 |
| Value | 85 |
| Percentage of BusinessCombinationConsiderationTransferred1 | 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 |
| Value | 0 | -594000.0 | 4352000.0 | 2570000.0 | 756000.0 | -3818000.0 | -3697000.0 | -500000.0 | 100000.0 | 100000.0 | -2700000.0 | 100000.0 | -1604000.0 | 100000.0 | 100000.0 | 100000.0 | 200000.0 | 0 | -2086000.0 | 0 | 0 |
| Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 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 |
| Value | 544000.0 | 124000.0 | -26000.0 | 213000.0 | -761000.0 | 68000.0 | -321000.0 | 487000.0 | -133000.0 | -374000.0 | -2308000.0 | 3183000.0 | 146000.0 | -208000.0 | 208000.0 | 83000.0 | 72000.0 | 276000.0 | 8000.0 | 90000.0 | -53000.0 | 53000.0 | 0 | 0 | 0 |
| Percentage of CapitalExpendituresIncurredButNotYetPaid | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2015-06-30 |
| Value | 5.6 | 5.5 | 5.3 | 5.6 | 6.4 | 7.3 | 5.9 | 8.1 | 8.2 | 8.7 | 1.0 |
| Percentage of CapitalizedComputerSoftwareAdditions | 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 |
| Value | 6.6 | 6.7 | 6.5 | 6.2 | 6.0 | 5.6 | 5.2 | 4.9 | 4.5 | 4.1 | 3.9 | 3.1 | 2.9 | 2.5 | 2.1 | 1.2 | 0.9 | 0.7 | 0.5 | 0.4 | 0.3 | 0.2 |
| Percentage of CapitalizedComputerSoftwareAmortization1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 5.256 | 3.055 | 5.258 | 5.665 | 4.658 | 5.614 | 1.591 | 1.359 | 1.523 | 1.25 | 0.803 | 0.734 | 0.596 | 0.57 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of CapitalizedContractCostAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.6 | 0.4 | 0.6 | 0.4 | 0.4 | 0.5 | 0.5 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Percentage of CapitalizedContractCostAmortization | 11.4 | 13.1 | 11.4 | 7.1 | 8.6 | 8.9 | 31.4 | 22.1 | 6.6 | 8.0 | 12.5 | 13.6 | 16.8 | 17.5 |
| 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 |
| Value | 4.6 | 2.7 | -1.6 | 5.2 | 4.3 | 5.1 | 1.0 | 1.1 | 1.4 | 1.2 | 0.7 | 0.6 | 0.5 | 0.5 |
| Percentage of CapitalizedContractCostAmortization | 87.5 | 88.4 | -30.4 | 91.8 | 92.3 | 90.8 | 62.9 | 80.9 | 91.9 | 96.0 | 87.2 | 81.7 | 83.9 | 87.7 |
| Period End | 2020-12-31 | 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 | 2015-12-31 | 2015-09-30 | 2014-12-31 | 2014-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of CashAcquiredFromAcquisition | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 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 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -2494000.0 | 1103000.0 | -721000.0 |
| Percentage of CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 5.002 | 7.915 | 2.745 |
| Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 0 |
| Percentage of CededPremiumsWritten | 0.0 |
| Period End | 2021-03-31 | 2020-03-31 |
| Value | 44.5 | 0.554 |
| Percentage of ConcentrationRiskPercentage1 | 100.0 | 100.0 |
| Period End | 2021-03-31 |
| Value | 14.6 |
| Percentage of ConcentrationRiskPercentage1 | 32.8 |
| Period End | 2021-03-31 |
| Value | 11.2 |
| Percentage of ConcentrationRiskPercentage1 | 25.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 29.6 | 28.8 | 21.0 | 0.199 | 0.187 |
| Percentage of ConcentrationRiskPercentage1 | 0.0 | 64.7 | 0.0 | 0.0 | 33.8 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 14.2 | 14.7 |
| Percentage of ConcentrationRiskPercentage1 | 0.0 | 33.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 20.7 | 0.252 | 0.22 | 22.2 | 0.132 | 0.131 |
| Percentage of ConcentrationRiskPercentage1 | 0.0 | 0.0 | 39.7 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 | 2020-12-31 |
| Value | 143000.0 | 341000.0 |
| Percentage of ContractWithCustomerAssetReclassifiedToReceivable | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 0.767 | 7.959 | 1.059 | 3.7 | 4.4 |
| Percentage of ContractWithCustomerLiabilityRevenueRecognized | 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 | 2019-09-30 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 2.9 | 13 | 0.8 | 3.6 | 6.5 | -1.3 | 2.5 | 6.5 | 9.4 | 2.5 |
| Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-08-31 |
| Value | 32 |
| Percentage of DebtConversionConvertedInstrumentAmount1 | 100.0 |
| Period End | 2020-08-31 |
| Value | 84 |
| Percentage of DebtConversionConvertedInstrumentAmount1 | 256.7 |
| Period End | 2020-08-31 |
| Value | 84 |
| Percentage of DebtConversionOriginalDebtAmount1 | 100.0 |
| Period End | 2020-08-31 |
| Value | 0.054867 |
| Percentage of DebtInstrumentConvertibleConversionRatio1 | 100.0 |
| Period End | 2020-08-31 |
| Value | 6400000.0 |
| Percentage of DebtInstrumentConvertibleNumberOfEquityInstruments | 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 | 125000.0 | 732000.0 | 128000.0 | 138000.0 | 135000.0 | 117000.0 | 95000.0 | 84000.0 |
| Percentage of DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome | 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 | 5000.0 | 5000.0 | 6000.0 | 5000.0 | 5000.0 | 5000.0 | 6000.0 | 5000.0 |
| Percentage of DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome | 4.0 | 0.7 | 4.7 | 3.6 | 3.7 | 4.3 | 6.3 | 6.0 |
| 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 | 38000.0 | 197000.0 | 51000.0 | 53000.0 | 49000.0 | 34000.0 | 17000.0 | 12000.0 |
| Percentage of DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome | 30.4 | 26.9 | 39.8 | 38.4 | 36.3 | 29.1 | 17.9 | 14.3 |
| 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 | 24000.0 | 471000.0 | 14000.0 | 15000.0 | 15000.0 | 14000.0 | 11000.0 | 9000.0 |
| Percentage of DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome | 19.2 | 64.3 | 10.9 | 10.9 | 11.1 | 12.0 | 11.6 | 10.7 |
| 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 | 58000.0 | 59000.0 | 57000.0 | 65000.0 | 66000.0 | 64000.0 | 61000.0 | 58000.0 |
| Percentage of DebtSecuritiesHeldToMaturityChangeInPresentValueInterestIncome | 46.4 | 8.1 | 44.5 | 47.1 | 48.9 | 54.7 | 64.2 | 69.0 |
| 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 | -0.209 | -0.059 | -0.359 | 0.119 | -0.95 | 0.058 | -22.936 | -0.97 | 1.274 | -0.492 |
| Percentage of DeferredIncomeTaxesAndTaxCredits | 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 |
| Value | 7.6 | 7.8 | 7.1 | 7.3 | 7.1 | 6.8 | 6.4 | 6.0 | 5.7 | 5.2 | 5.5 | 4.3 | 3.9 | 3.6 | 3.2 | 2.3 | 1.9 | 1.8 | 0.2 | 0.9 | 0.8 | 0.7 | 0.5 | 0.5 | 0.2 | 0.0 |
| Percentage of Depreciation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 14 | 15 | 14 | 14 | 15 | 16 | 15 | 15 | 15 | 14 | 14 | 10 | 10 | 9.496 | 11 | 7.717 | 6.904 | 6.615 | 6.496 | 3.746 | 3.612 | 3.371 | 3.126 | 3.056 | 0.984 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of DepreciationAndAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 160000.0 | 160000.0 | 160000.0 |
| Percentage of DepreciationAndAmortizationDiscontinuedOperations | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 1900000.0 |
| Percentage of DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -847000.0 | -1508000.0 | -265000.0 |
| Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | -326000.0 |
| Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 5885000.0 | 4640000.0 | 3295000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 2800000.0 | 3200000.0 | 3100000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold | 0.0 | 47.6 | 69.0 | 94.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 5764000.0 | 4236000.0 | 5675000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 1100000.0 | 1000000.0 | 3100000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense | 0.0 | 19.1 | 23.6 | 54.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 4000.0 | 3000.0 | 4000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationInterestExpense | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 112000.0 | 137000.0 | 149000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationInterestIncome | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 45 | 27 | 32 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -930000.0 | -1639000.0 | -410000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 |
| Value | 0 | 25000.0 | 3000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationOtherExpense | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 44 | 25 | 32 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.038 | 0.039 | 0.24 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue | 0.0 | 0.1 | 0.2 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 44 | 25 | 32 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue | 0.0 | 99.9 | 99.8 | 99.3 |
| 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 |
| Value | -55000.0 | 1000.0 | 22000.0 | 17000.0 | -15000.0 | 41000.0 | 11000.0 | 48000.0 | -10000.0 | -19000.0 | -71000.0 | 28000.0 | 11000.0 | -4000.0 | 0 | 0 | 0 | 0 |
| Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.0 | 0.0 | 0.0 | 47 | 0.0 | 0.0 |
| Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-08-31 |
| Value | 14 |
| Percentage of ExtinguishmentOfDebtAmount | 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 | 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 |
| Value | 2618000.0 | 2612000.0 | -11350000.0 | 6375000.0 | 3717000.0 | 500000.0 | -100000.0 | -100000.0 | 2700000.0 | -100000.0 | 600000.0 | -100000.0 | -100000.0 | -100000.0 | -200000.0 | 0 | 2086000.0 | 0 | 0 |
| Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 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 | 0.0 | 13 | 0.0 | 0.0 | 0.0 | 3.5 | 0.0 | 0.0 | 0.0 | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 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 |
| Value | 0 | 0 | 1000.0 | 2000.0 | 0 | 0 |
| Percentage of FinanceLeaseInterestExpense | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 |
| Value | 0 | 0 | 150000.0 | 149000.0 | 0 | 0 |
| Percentage of FinanceLeaseRightOfUseAssetAmortization | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 5749000.0 | 0 | 0 | -6447000.0 | 0 | 0 | 9600000.0 | 0 | 0 | 0 | 0 |
| Percentage of GainLossOnDispositionOfAssets1 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-01 |
| Value | 5700000.0 |
| Percentage of GainLossOnDispositionOfAssets1 | 0.0 |
| Period End | 2020-08-31 |
| Value | -4800000.0 |
| Percentage of GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost | 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 | 2018-12-31 | 2018-09-30 |
| Value | -13000.0 | -7000.0 | -42000.0 | -69000.0 | -67000.0 | -11000.0 | -31000.0 | 5000.0 | 10000.0 | 48000.0 | -70000.0 |
| Percentage of GoodwillForeignCurrencyTranslationGainLoss | 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 | -13000.0 | -7000.0 | -2000.0 | -67000.0 |
| Percentage of GoodwillForeignCurrencyTranslationGainLoss | 100.0 | 100.0 | 2.9 | 100.0 |
| 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 | 2018-09-30 |
| Value | -42000.0 | -69000.0 | -67000.0 | -11000.0 | -31000.0 | 5000.0 | 10000.0 | 48000.0 | -70000.0 |
| Percentage of GoodwillForeignCurrencyTranslationGainLoss | 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 | 2019-06-30 | 2019-03-31 | 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 |
| Value | 199 | 0.0 | 215 | 47 | 199 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 160 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of GoodwillImpairmentLoss | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 1383000.0 | -1508000.0 | -265000.0 |
| Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -521000.0 | -1508000.0 | -265000.0 |
| Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax | 0.0 | -37.7 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 |
| Value | 0.01 | 0.01 | -0.01 |
| Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 |
| Value | 0.01 | 0.01 | -0.01 |
| Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | 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 |
| Value | 4.879 | 7.783 | -0.975 | -13.717 | 25 | -0.412 | -3.278 | -3.859 | -1.904 | -0.424 | -1.949 | -1.4 | -1.3 | -0.1 | -0.5 | -0.369 | -0.555 | -0.522 | -0.379 | -0.448 | -0.014 | 0.0 | 0.0 | 0.0 | -16.846 | -11.319 | -10.698 | -3.167 | -5.939 |
| Percentage of IncomeLossFromEquityMethodInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | -8.027 | -9.698 | 2.537 | 2.193 | 4.749 | -0.678 | -1.191 | -16.494 | -7.772 | 3.605 | -1.766 | 7.806 | 0.931 | 5.209 | 8.294 | -7.454 | 3.106 | -6.727 | 9.064 | 3.641 | 1.11 | 1.414 | -3.716 | 1.645 | -1.717 | 0.0 | 0.0 | 0.0 |
| Percentage of IncreaseDecreaseInAccruedLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -0.194 | 2.684 | 1.868 | -4.411 | -3.777 | -2.623 | -2.873 | -4.222 | 4.603 | 1.736 | -2.647 | -7.439 | -2.602 | 10 | -1.287 | -1.884 |
| Percentage of IncreaseDecreaseInContractWithCustomerLiability | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 6.509 | -28.014 | 15 | 5.468 | 8.025 | -18.143 | 7.666 | 0.186 | 10 | -9.591 | -7.512 | 5.787 | 6.724 | -19.57 | 4.404 | 8.923 | 4.794 | -21.424 | 7.316 | 4.296 | 7.368 | -12.302 | 5.08 | 8.951 | -2.629 | 0.0 |
| Percentage of IncreaseDecreaseInEmployeeRelatedLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -407000.0 | 1925000.0 | 3758000.0 | 3935000.0 | 380000.0 | 93000.0 | -521000.0 | -48000.0 | -168000.0 | -4618000.0 | 2120000.0 | 226000.0 | 1018000.0 | -154000.0 | -63000.0 | 2776000.0 | -3768000.0 | -727000.0 | -270000.0 | 26000.0 | 43000.0 | 48000.0 | 0 | 0 | 0 | 0 |
| Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 4.476 | -1.037 | 1.773 | -13.025 | 5.371 | -1.459 | -2.282 | -7.391 | 4.708 | 4.174 | -0.647 | 2.64 | 0.143 | 12 | -7.854 | 3.713 | 0.783 | 0.629 | 9.856 | -0.317 | 1.085 | -0.656 | 0.688 | 0.341 | 1.007 | 0.0 | 0.0 | 0.0 |
| Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 0 | 2000.0 | -108000.0 | 0 | 495000.0 | 0 | 0 | 0 | 106000.0 | 0 | 1000.0 | -8044000.0 | 605000.0 | 0 |
| Percentage of IncreaseDecreaseOfRestrictedInvestments | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 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 |
| Value | 68000.0 | 123000.0 | 115000.0 | 1288000.0 | 842000.0 | 919000.0 | 961000.0 | 1124000.0 | 842000.0 | 1060000.0 | 522000.0 | 968000.0 | 878000.0 | 1072000.0 | 843000.0 | 411000.0 | 218000.0 | 185000.0 | 165000.0 | 255000.0 | 272000.0 | 279000.0 |
| Percentage of InvestmentIncomeInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 3.629 | 6.139 | 4.07 | 7.716 | 5.202 | 4.259 | 4.792 | 4.217 | 4.959 | 4.736 |
| Percentage of LeaseCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-01-08 |
| Value | 35000.0 |
| Percentage of LegalFees | 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 |
| Value | 52 | 65 | 153 | 189 | 108 | 92 | 99 | 81 | 59 | 40 | 54 | 16 | 15 | 10 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | 100.0 | 100.0 | 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 | 62 | 11 | 88 | 75 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | 119.1 | 17.1 | 81.1 | 81.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -9.96 | 30 | 1.877 | 2.143 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | -19.1 | 47.2 | 1.7 | 2.3 |
| 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 |
| Value | 128 | 168 | 90 | 77 | 81 | 64 | 45 | 28 | 38 | 0.0 | 0.0 | 0.0 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | 84.0 | 88.7 | 82.8 | 83.9 | 81.6 | 79.5 | 75.3 | 71.1 | 69.8 | 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 | 0.0 | 23 | 24 | 21 | 18 | 14 | 18 | 16 | 14 | 11 | 16 | 16 | 15 | 10 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1 | 0.0 | 35.7 | 16.0 | 11.3 | 17.2 | 16.1 | 18.4 | 20.5 | 24.7 | 28.9 | 30.2 | 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 |
| Value | 43 | 55 | 0.504 | -0.961 | 1.482 | 15 | -0.091 | 0.508 | 1.813 | 14 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 61 | 10 | 0.902 | 6.597 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | 139.7 | 18.3 | 60.9 | 42.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -17.38 | 38 | -0.693 | 3.223 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | -39.7 | 68.4 | -46.8 | 20.8 |
| 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 |
| Value | 0.53 | -0.961 | 0.209 | 9.82 | 0.034 | 0.294 | 0.966 | 6.871 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | 105.2 | 100.0 | 14.1 | 63.3 | -37.4 | 57.9 | 53.3 | 49.0 | 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 | 0.0 | 7.378 | -0.026 | 0.0 | 1.273 | 5.702 | -0.125 | 0.214 | 0.847 | 7.156 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1 | 0.0 | 13.3 | -5.2 | -0.0 | 85.9 | 36.7 | 137.4 | 42.1 | 46.7 | 51.0 | 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 | 25 | 25 | -23.84 | -52.169 | 0.5 | 28 | 89 | 10 | 3.033 | 2.424 | 2.783 | 0.872 | 2.767 | 6.699 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease | 100.0 | 100.0 | 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 | 87 | -13.024 | 2.845 | 28 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease | 337.9 | -50.8 | 569.0 | 100.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -61.82 | 35 | -1.685 | -3.228 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease | -237.9 | 137.8 | -337.0 | -11.5 |
| 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 |
| Value | -23.988 | -52.817 | 1.16 | 24 | 20 | 11 | 2.037 | 4.663 | 0.55 | 0.0 | 0.0 | 0.0 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease | 100.6 | 101.2 | 232.0 | 89.0 | 23.2 | 111.5 | 67.2 | 192.4 | 19.8 | 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 | 0.0 | 3.335 | 0.148 | 0.648 | -0.66 | 3.082 | 68 | -1.15 | 0.996 | -2.239 | 2.233 | 0.872 | 2.767 | 6.699 |
| Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease | 0.0 | 13.0 | -0.6 | -1.2 | -132.0 | 11.0 | 76.8 | -11.5 | 32.8 | -92.4 | 80.2 | 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 | 0 | 0 | 4185000.0 | 0 | 0 | 0 | 0 | 800000.0 |
| Percentage of NoncashOrPartNoncashAcquisitionPayablesAssumed1 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2018-06-30 | 2018-03-31 |
| Value | 0 | 0 | 0 | 6689000.0 | 0 | 0 |
| Percentage of NoncontrollingInterestDecreaseFromDeconsolidation | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2018-03-31 |
| Value | 0 | 0 | 0 | 6689000.0 | 5000.0 |
| Percentage of NoncontrollingInterestDecreaseFromDeconsolidation | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-09-30 |
| Value | 25 |
| Percentage of NoncontrollingInterestIncreaseFromBusinessCombination | 100.0 |
| Period End | 2020-09-01 |
| Value | 25 |
| Percentage of NoncontrollingInterestIncreaseFromBusinessCombination | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 |
| Value | 0.0 | 25 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.5 | 42 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 332 |
| Percentage of NoncontrollingInterestIncreaseFromBusinessCombination | 0.0 | 100.2 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-09-30 | 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 |
| Value | 0.0 | 0.0 | -6.689 | 0.429 | 0.027 | 0.209 | -0.022 | 2.938 | -0.014 | 0.02 | -0.005 | 0.126 | 1.793 | 0.502 | 1.403 | 19 | 0.0 | 0.0 | 0.0 |
| Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 2.437 | 4.818 | 2.817 | 6.389 | 3.586 | 3.056 | 3.496 | 3.288 | 3.838 | 3.281 |
| Percentage of OperatingLeaseCost | 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 |
| Value | 3.212 | 3.41 | 3.421 | 3.434 | 4.094 | 2.759 | 2.952 | 2.836 | 2.377 | 4.165 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of OperatingLeasePayments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 663000.0 | 66000.0 | -935000.0 | -1585000.0 | 300000.0 | -524000.0 | 239000.0 | 552000.0 | -100000.0 | -427000.0 | -559000.0 | 56000.0 | -151000.0 | 206000.0 | -102000.0 | -97000.0 | -132000.0 | -159000.0 | -473000.0 | -167000.0 | -166000.0 | -110000.0 | -79000.0 | -69000.0 | -24000.0 | 0 | 0 | 0 |
| Percentage of OtherNoncashIncomeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -18000.0 | -14000.0 | -289000.0 | -111000.0 | 352000.0 | -71000.0 | -248000.0 | -84000.0 | -587000.0 | 427000.0 |
| Percentage of OtherOperatingIncomeExpenseNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2019-09-30 |
| Value | 0 | -2570000.0 |
| Percentage of PaymentsForProceedsFromLoansReceivable | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 |
| Value | 0 | 0 | 0 | 2287000.0 | 0 | 0 |
| Percentage of PaymentsForRemovalCosts | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-01-08 |
| Value | 13 |
| Percentage of PaymentsForRepurchaseOfWarrants | 100.0 |
| Period End | 2021-01-08 |
| Value | 13 |
| Percentage of PaymentsForRepurchaseOfWarrants | 100.0 |
| Period End | 2021-01-08 |
| Value | 13 |
| Percentage of PaymentsForRepurchaseOfWarrants | 100.0 |
| Period End | 2020-08-31 |
| Value | 2500000.0 |
| Percentage of PaymentsOfDebtIssuanceCosts | 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 |
| Value | 455000.0 | 2687000.0 | 469000.0 | 51000.0 | 143000.0 | 1188000.0 | 201000.0 | 3000.0 | 225000.0 | 2180000.0 | 57000.0 | 80000.0 | 299000.0 | 800000.0 | 93000.0 | 4000.0 | 508000.0 | 667000.0 | 0 | 47000.0 | 318000.0 | 0 | 0 | 0 |
| Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 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 | 2015-06-30 | 2015-03-31 |
| Value | 0.0 | 1.472 | 0.0 | 0.0 | 0.0 | 2.575 | 0.0 | 6.0 | 118 | -0.124 | 0.0 | 11 | 0.0 | 0.453 | 3.241 | 0.0 | -0.5 | 3.0 | 11 | 0.0 | 0.0 |
| Percentage of PaymentsToAcquireBusinessesGross | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 2.994 | 0.002 | 9.721 | 0.109 | 1.338 | 2.225 | 1.778 | 3.343 | 3.779 | 10 | 0.0 | 0.0 | 0.0 |
| Percentage of PaymentsToAcquireHeldToMaturitySecurities | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 5.571 | 5.941 | 5.859 | 6.159 | 10 | 7.4 | 9.157 | 8.638 | 8.277 | 9.462 |
| Percentage of PaymentsToAcquireOtherProductiveAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-11-16 |
| Value | 20 |
| Percentage of PaymentsToMinorityShareholders | 100.0 |
| Period End | 2020-12-31 |
| Value | 40 |
| Percentage of ProceedsFromCollectionOfNotesReceivable | 100.0 |
| Period End | 2020-12-31 |
| Value | 0.0 |
| Percentage of ProceedsFromConvertibleDebt | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 42 |
| Percentage of ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 9372000.0 |
| Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital | 0.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 3600000.0 |
| Percentage of ProceedsFromInterestReceived | 100.0 |
| Period End | 2020-08-31 |
| Value | 38 |
| Percentage of ProceedsFromIssuanceOfDebt | 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 |
| Value | 2.858 | 6.518 | 0.603 | 1.448 | 0.442 | 0.084 | 0.095 | 0.049 | 0.825 | 0.123 | 1.341 | 5.896 | 3.231 | 1.461 | 0.28 | 0.242 | 3.018 | 0.542 | 0.015 | 1.13 | 0.089 | 0.025 | 0.06 | 0.054 | 0.038 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -1716000.0 | 2327000.0 | 1845000.0 | 1178000.0 | -741000.0 | 1001000.0 |
| Percentage of ProvisionForDoubtfulAccounts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-03-31 |
| Value | 2407000.0 | 495000.0 |
| Percentage of ProvisionForLoanLeaseAndOtherLosses | 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 | 6.369 | 10 | 11 | 2.959 | 0.0 | 0.0 | 10 | 20 | 20 | 21 |
| Percentage of ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 |
| Value | 0 | 422000.0 | 0 | 0 | 807000.0 | 8000.0 |
| Percentage of ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-01-08 |
| Value | 98 |
| Percentage of RepaymentsOfLongTermLinesOfCredit | 100.0 |
| Period End | 2021-01-08 |
| Value | 98 |
| Percentage of RepaymentsOfLongTermLinesOfCredit | 100.0 |
| Period End | 2021-01-08 |
| Value | 98 |
| Percentage of RepaymentsOfLongTermLinesOfCredit | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0.0 | 98 | 0.218 |
| Percentage of RepaymentsOfSeniorDebt | 0.0 | 100.0 | 100.0 |
| Period End | 2020-08-31 |
| Value | 13 |
| Percentage of RepaymentsOfSeniorDebt | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 700000.0 | 5400000.0 |
| Percentage of RestructuringCharges | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 76000.0 | 109000.0 |
| Percentage of RestructuringCharges | 10.9 | 2.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 587000.0 | 3200000.0 |
| Percentage of RestructuringCharges | 83.9 | 59.3 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 2071000.0 |
| Percentage of RestructuringCharges | 0.0 | 38.4 |
| Period End | 2021-01-11 |
| Value | 22 |
| Percentage of SaleOfStockConsiderationReceivedOnTransaction | 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 | 0.0 | 0.052 | 1.096 | 1.757 | 0.03 | 6.103 | 2.56 | 0.307 | 3.881 | 10 | -3.694 | 0.0 | -0.105 | 1.594 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of SeveranceCosts1 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2019-09-30 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-05 |
| Value | 0 | 0 | 0 | 0 | 7384000.0 | 0 | 0 | 1067000.0 | -468.0 | 0 | 2051500.0 |
| Percentage of StockIssuedDuringPeriodSharesAcquisitions | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 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 | 110000.0 | 290000.0 | 77000.0 | 35000.0 | 113000.0 | 237000.0 | 79000.0 | 3000.0 | 77000.0 | 203000.0 | 5000.0 | 6000.0 | 72000.0 | 129000.0 | 11000.0 | 33000.0 | 45000.0 | 60000.0 |
| Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 306000.0 | 594000.0 | 61000.0 | 265000.0 | 82000.0 | 8000.0 | 22000.0 | 13000.0 | 93000.0 | 11000.0 | 146000.0 | 808000.0 | 412000.0 | 354000.0 |
| Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised | 100.0 | 100.0 | 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 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.8 | 167 | 0.0 | 0.0 | 10 | 0.0 | 0.0 |
| Percentage of StockIssuedDuringPeriodValueAcquisitions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 0.056 | 0.0 | 0.0 | 0.011 | 0.0 | 0.0 |
| Percentage of StockIssuedDuringPeriodValueAcquisitions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.8 | 167 | 0.0 | 0.0 | 10 | 0.0 | 0.0 |
| Percentage of StockIssuedDuringPeriodValueAcquisitions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 99.9 | 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 |
| Value | -454000.0 | -2688000.0 | -469000.0 | -51000.0 | -144000.0 | -1188000.0 | -201000.0 | -3000.0 | -222000.0 | -2180000.0 | -57000.0 | -79000.0 | -299000.0 | -800000.0 | -93000.0 | -4000.0 | -508000.0 | -667000.0 | 2558000.0 | -47000.0 |
| Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 1000.0 | 1000.0 | 0 | 1000.0 | 2000.0 | 1000.0 | 0 | 1000.0 | 2000.0 | 0 | 1000.0 | 1000.0 | 1000.0 | 0 | 0 | 1000.0 | 1000.0 |
| Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | -0.2 | -0.2 | -0.0 | -0.7 | -0.2 | -0.5 | -0.0 | -0.5 | -0.1 | -0.0 | -1.3 | -0.3 | -0.1 | -0.0 | -0.0 | -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 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 |
| Value | -455000.0 | -2691000.0 | -470000.0 | -51000.0 | -145000.0 | -1190000.0 | -202000.0 | -3000.0 | -223000.0 | -2182000.0 | -57000.0 | -80000.0 | -300000.0 | -801000.0 | -93000.0 | -4000.0 | -509000.0 | -668000.0 | 2558000.0 | -47000.0 |
| Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 100.2 | 100.1 | 100.2 | 100.0 | 100.7 | 100.2 | 100.5 | 100.0 | 100.5 | 100.1 | 100.0 | 101.3 | 100.3 | 100.1 | 100.0 | 100.0 | 100.2 | 100.1 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-03-31 |
| Value | 3000.0 | 2000.0 |
| Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | -0.1 | -0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | -454000.0 | -2688000.0 | -469000.0 | -51000.0 | -144000.0 | -1188000.0 |
| Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 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 |
| Value | 2.858 | 6.518 | 0.603 | 1.448 | 0.443 | 0.084 | 0.095 | 0.049 | 0.823 | 0.123 | 1.341 | 5.895 | 3.231 | 1.461 | 0.28 | 0.242 | 3.018 | 0.542 | 0.015 | 1.13 | 0.089 | 0.025 | 0.06 | 0.054 |
| Percentage of StockIssuedDuringPeriodValueStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.003 | 0.006 | 0.0 | 0.003 | 0.001 | 0.001 | 0.0 | 0.0 | 0.001 | 0.0 | 0.0 | 0.007 | 0.004 | 0.004 | 0.0 | 0.001 | 0.007 | 0.02 |
| Percentage of StockIssuedDuringPeriodValueStockOptionsExercised | 0.1 | 0.1 | 0.0 | 0.2 | 0.2 | 1.2 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.3 | 0.0 | 0.4 | 0.2 | 3.7 |
| 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 |
| Value | 2.855 | 6.512 | 0.603 | 1.445 | 0.442 | 0.083 | 0.095 | 0.049 | 0.822 | 0.123 | 1.341 | 5.888 | 3.227 | 1.457 | 0.28 | 0.241 | 3.011 | 0.522 | 0.015 | 1.13 | 0.089 | 0.025 | 0.06 | 0.054 |
| Percentage of StockIssuedDuringPeriodValueStockOptionsExercised | 99.9 | 99.9 | 100.0 | 99.8 | 99.8 | 98.8 | 100.0 | 100.0 | 99.9 | 100.0 | 100.0 | 99.9 | 99.9 | 99.7 | 100.0 | 99.6 | 99.8 | 96.3 | 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 |
| Value | 2.858 | 6.518 | 0.603 | 1.448 | 0.443 | 0.084 |
| Percentage of StockIssuedDuringPeriodValueStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 0 | 188000.0 | 5000.0 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodShares | 0.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0 | 685000.0 | 0 | 0 | -908000.0 | 0 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodValue | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0 | 2000.0 | 0 | 0 | 2000.0 | 1000.0 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodValue | 0.0 | 0.3 | 0.0 | 0.0 | -0.2 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0 | 683000.0 | 0 | 0 | -910000.0 | -1000.0 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodValue | 0.0 | 99.7 | 0.0 | 0.0 | 100.2 | 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 | 2.333 | 3.934 | -0.138 | 2.985 | 1.357 | -0.527 | -0.291 | -1.299 | -12.411 | 13 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -3.936 | 4.151 | 0.234 | -0.257 |
| Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | -168.7 | 105.5 | 17.2 | 48.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 6.269 | 0.024 | -0.117 | -0.381 |
| Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | 268.7 | 0.6 | -8.6 | 72.3 |
| 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 |
| Value | 0.551 | 2.848 | 0.117 | -0.638 | 0.001 | -0.579 | -6.635 | 6.879 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | -399.3 | 95.4 | 8.6 | 121.1 | -0.3 | 44.6 | 53.5 | 52.4 | 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 | 0.0 | -0.241 | -0.689 | 0.137 | 1.24 | 0.111 | -0.292 | -0.72 | -5.776 | 6.259 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense | 0.0 | -6.1 | 499.3 | 4.6 | 91.4 | -21.1 | 100.3 | 55.4 | 46.5 | 47.6 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 25 | -4.626 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 100.0 | 100.0 |
| Period End | 2020-09-30 |
| Value | -25.749 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 556.6 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 0.0 | 21 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 0.0 | -456.6 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 0.0 | 21 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 0.0 | -456.6 |
| Period End | 2020-09-30 | 2019-12-30 |
| Value | 30.0 | 0.3 |
| Percentage of VariableInterestEntityOwnershipPercentage | 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 | 1192000.0 | 1321000.0 | 1253000.0 | 1327000.0 | 1465000.0 | 1052000.0 | 672000.0 | 929000.0 | 1121000.0 | 1455000.0 |
| Percentage of VariableLeaseCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-01-08 |
| Value | 9500000.0 |
| Percentage of WriteOffOfDeferredDebtIssuanceCost | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 99.0 | 99.7 | 98.2 | 98.4 |
| Percentage of CashFDICInsuredAmountPercentage | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 1.0 | 0.3 | 0.2 | 0.2 |
| Percentage of CashHeldInInternationalBanksPercentage | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 1.6 | 1.4 |
| Percentage of CashHeldInMoneyMarketFundsPercentage | 100.0 | 100.0 |
| Period End | 2020-08-31 |
| Value | 1700000.0 |
| Percentage of DebtIssuanceCostsNetDebtComponent | 100.0 |
| Period End | 2020-12-31 |
| Value | 197000.0 |
| Percentage of DeferredTaxAssetOutsideBasisDifferences | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 15 | 18 |
| Percentage of DeferredTaxAssetsOperatingLeaseRightOfUseAsset | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 117000.0 | 149000.0 | 160000.0 | 185000.0 | 321000.0 | 362000.0 | 406000.0 |
| Percentage of DeferredTaxAssetsStartupandOrganizationalCosts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 3400000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNetAfterGrossUp | 100.0 |
| Period End | 2020-12-31 |
| Value | 1115000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccruedCompensationAndEmployeeBenefitsCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 3728000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationInvestmentsCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 10 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationInvestmentsNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 9858000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationLiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpenseAndPerformanceBasedArrangementsCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 59000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 63000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRestrictedCashAndRestrictedInvestmentsCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 616000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRestrictedCashAndRestrictedInvestmentsNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 100000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRestrictedCashCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 600000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationRestrictedInvestmentsNoncurrent | 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 | 39.0 | 39.0 | 38.0 | 40.0 | 0.7 | 0.7 | 0.7 | 0.43 | 0.43 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Percentage of EquityMethodInvestmentEconomicInterestPercentage | 100.0 | 100.0 | 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 | 4.0 | 4.0 | 4.0 | 4.0 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.26 |
| Percentage of EquityMethodInvestmentEconomicInterestPercentage | 10.3 | 10.3 | 10.5 | 10.0 | 5.7 | 5.7 | 5.7 | 9.3 | 9.3 | 10.0 | 10.0 | 10.0 | 10.0 | 65.0 |
| 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 |
| Value | 40.0 | 40.0 | 40.0 | 40.0 | 0.57 | 0.57 | 0.57 | 0.4 |
| Percentage of EquityMethodInvestmentVotingInterestPercentage | 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 | 2018-12-31 |
| Value | 25.0 | 25.0 | 25.0 | 25.0 | 0.25 | 0.25 | 0.25 | 0.04 |
| Percentage of EquityMethodInvestmentVotingInterestPercentage | 62.5 | 62.5 | 62.5 | 62.5 | 43.9 | 43.9 | 43.9 | 10.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 64.0 | 64.0 | 59.0 | 64.0 |
| Percentage of FinancingReceivablePercentNotPastDue | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 |
| Value | 159 | 159 | 176 |
| Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 700000.0 | 1400000.0 |
| Percentage of LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 47 | 47 |
| Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFive | 100.0 | 100.0 |
| Period End | 2020-09-30 |
| Value | 56 |
| Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour | 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 |
| Value | 238 | 207 | 188 | 208 | 94 | 89 | 61 | 43 | 33 | 30 | 27 |
| Percentage of LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpenseAndPerformanceBasedArrangements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 |
| Value | 50.0 |
| Percentage of LossGivenDefaultRateAssumed | 100.0 |
| 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
| Value | 0.118 | 1.005 | 1.006 | 1.004 | 0.002 | 34 | 34 | 31 | 32 | 29 | 18 | 16 |
| Percentage of RestrictedCashAndCashEquivalentsFairValueDisclosure | 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 | 2020-09-30 | 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 | 0.118 | 1.005 | 1.006 | 1.004 | 0.002 | 34 | 34 | 31 | 32 | 29 | 18 | 16 |
| Percentage of RestrictedCashAndCashEquivalentsFairValueDisclosure | 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 |
| Value | 5771000.0 |
| Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVestedAndExpectedToVest | 100.0 |
| Period End | 2020-12-31 |
| Value | 1170000.0 |
| Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestNumber | 100.0 |
| Period End | 2020-12-31 |
| Value | 11.1 |
| Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue | 100.0 |
| Period End | 2020-12-31 |
| Value | 700000.0 |
| Percentage of UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 240 | 180 | 122 | 92 | 93 | 71 |
| Percentage of AccountsNotesAndLoansReceivableNetCurrent | 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 | 2018-06-30 | 2018-03-31 | 2018-01-01 |
| Value | 264 | 211 | 173 | 137 | 69 | 63 | 47 |
| Percentage of AccountsReceivableNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 9400000.0 | 7100000.0 | 5200000.0 | 1500000.0 | 3400000.0 | 41000.0 | 0 | 0 | 0 |
| Percentage of AllowanceForDoubtfulAccountsReceivable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2020-12-31 | 2020-06-30 | 2019-12-31 |
| Value | 7700000.0 | 7056000.0 | 1541000.0 | 41000.0 |
| Percentage of AllowanceForDoubtfulAccountsReceivableCurrent | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2016-06-30 | 2015-12-31 |
| Value | 5.877 | 5.614 | 5.847 | 3.83 | 4.702 | 3.177 | 40 | 43 | 42 | 73 | 102 | 78 | 77 | 83 | 122 |
| Percentage of AssetsFairValueDisclosure | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2016-06-30 | 2015-12-31 |
| Value | 5.877 | 5.614 | 5.847 | 3.83 | 4.702 | 3.177 | 40 | 43 | 42 | 73 | 102 | 78 | 77 | 135 | 176 |
| Percentage of AssetsFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 162.4 | 144.2 |
| Period End | 2020-12-31 |
| Value | 54 |
| Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation | 100.0 |
| Period End | 2020-12-31 |
| Value | 33 |
| Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 33 |
| Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 100.0 |
| Period End | 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 | 2017-12-31 |
| Value | 1808000.0 | 4002000.0 | 2537000.0 | 0 | 0 | 0 | 1212000.0 | 823000.0 | 8000.0 | 1243000.0 | 0 |
| Percentage of AssumedLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-08-02 |
| Value | 45 |
| Percentage of BusinessCombinationContingentConsiderationLiability | 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 |
| Value | 3.6 | 4.1 | 3.3 | 3.6 | 4.0 | 4.4 | 4.7 | 4.3 | 2.8 | 2.5 | 1.5 | 2.0 | 1.9 | 0.8 |
| Percentage of CapitalizedContractCostNet | 100.0 | 100.0 | 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 |
| Value | 18 | 21 | 23 | 24 | 27 | 29 | 31 | 25 | 21 | 20 | 17 | 12 | 9.0 | 9.2 |
| Percentage of CapitalizedContractCostNet | 522.2 | 517.1 | 709.1 | 691.7 | 692.5 | 677.3 | 676.6 | 597.7 | 775.0 | 800.0 | 1173.3 | 615.0 | 473.7 | 1150.0 |
| 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 | 22 | 25 | 26 | 28 | 31 | 34 | 36 | 29 | 24 | 22 | 19 | 14 | 10 | 0.0 |
| Percentage of CapitalizedContractCostNetNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2015-12-31 |
| Value | 5.877 | 5.496 | 4.842 | 2.824 | 3.698 | 3.175 | 5.756 | 9.139 | 11 | 41 | 73 | 60 | 60 | 76 | 68 | 5.986 | 1.128 | 35 | 83 | 122 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2015-12-31 |
| Value | 5.877 | 5.496 | 4.842 | 2.824 | 3.698 | 3.175 | 5.756 | 9.139 | 11 | 41 | 73 | 60 | 60 | 76 | 68 | 5.986 | 1.128 | 35 | 83 | 122 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2021-03-31 | 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 |
| Value | 190000.0 | 329000.0 | 671000.0 | 2393000.0 | 2612000.0 | 2750000.0 | 2610000.0 | 2678000.0 | 2977000.0 | 3063000.0 |
| Percentage of ContractWithCustomerAssetGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 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 | 190000.0 | 329000.0 | 671000.0 | 2346000.0 | 1752000.0 | 1751000.0 | 1365000.0 | 1187000.0 | 1282000.0 | 2102000.0 | 3705000.0 | 3008000.0 | 4092000.0 | 0 |
| Percentage of ContractWithCustomerAssetNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 18 | 18 | 17 | 14 | 14 | 18 | 21 | 22 | 27 | 22 | 22 |
| Percentage of ContractWithCustomerLiability | 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 | 2018-01-01 |
| Value | 4932000.0 | 5415000.0 | 3593000.0 | 2520000.0 | 1338000.0 | 1494000.0 | 1330000.0 | 169000.0 | 256000.0 | 443000.0 | 1502000.0 | 1000000.0 | 1405000.0 | 493000.0 |
| Percentage of ContractWithCustomerLiabilityNoncurrent | 100.0 | 100.0 | 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 |
| Value | 26 | 26 | 26 | 26 | 123 | 123 | 123 | 123 | 122 | 122 | 122 | 122 | 121 | 121 | 121 | 121 | 120 | 120 | 120 |
| Percentage of ConvertibleDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 85 | 83 | 81 | 79 |
| Percentage of ConvertibleDebt | 320.1 | 313.3 | 306.7 | 300.9 |
| 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 | 2017-12-31 |
| Value | 121 | 118 | 116 | 113 | 111 | 109 | 107 | 105 | 102 | 100 | 98 | 0.0 |
| Percentage of ConvertibleDebt | 454.8 | 446.4 | 438.1 | 430.0 | 90.3 | 88.6 | 87.0 | 85.4 | 83.8 | 82.2 | 80.7 | 0.0 |
| Period End | 2020-08-31 |
| Value | 18.23 |
| Percentage of DebtInstrumentConvertibleConversionPrice1 | 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 |
| Value | 26 | 26 | 26 | 26 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 |
| Percentage of DebtInstrumentFaceAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-10-31 | 2018-10-24 | 2018-10-22 | 2017-12-31 |
| Value | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 172 | 22 | 150 | 0.0 |
| Percentage of DebtInstrumentFaceAmount | 645.2 | 645.2 | 645.2 | 645.2 | 138.0 | 138.0 | 138.0 | 138.0 | 138.0 | 138.0 | 138.0 | 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 |
| Value | 0.082 | 0.131 | 0.18 | 0.23 | 1.303 | 1.533 | 1.763 | 2.689 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet | 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 |
| Value | 31 | 33 | 35 | 37 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet | 38696.3 | 25711.5 | 19771.7 | 16210.0 |
| 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 |
| Value | 51 | 53 | 56 | 58 | 60 | 63 | 65 | 73 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet | 62524.4 | 41020.6 | 31195.0 | 25442.6 | 4668.8 | 4116.6 | 3705.7 | 2743.4 |
| Period End | 2020-08-31 |
| Value | 3000000.0 |
| Percentage of DeferredFinanceCostsNet | 100.0 |
| Period End | 2020-08-31 |
| Value | 1300000.0 |
| Percentage of DeferredFinanceCostsNet | 43.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 103 | 124 | 70 | 4.523 | 62 | 50 | 28 |
| Percentage of DeferredIncomeTaxLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 2452000.0 | 2490000.0 |
| Percentage of DeferredTaxAssetInterestCarryforward | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 23 | 19 | 0.0 |
| Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets | 100.0 | 100.0 | 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 | 192 | 173 | 82 | 55 | 68 | 48 | 35 |
| Percentage of DeferredTaxAssetsGross | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 123 | 112 | 76 | 51 | 60 | 39 | 30 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwards | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 8640000.0 | 3941000.0 | 861000.0 | -69000.0 | 509000.0 | 521000.0 | 105000.0 |
| Percentage of DeferredTaxAssetsOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 131000.0 |
| Percentage of DeferredTaxAssetsPropertyPlantAndEquipment | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 1828000.0 | 1828000.0 | 1828000.0 | 0 |
| Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 2400000.0 | 2100000.0 |
| Percentage of DeferredTaxAssetsTaxCreditCarryforwardsResearch | 131.3 | 114.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 8530000.0 | 8899000.0 | 0 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 7488000.0 | 9534000.0 | 0 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 6375000.0 | 9510000.0 | 0 |
| Percentage of DeferredTaxLiabilitiesDeferredExpense | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 12 | 14 | 0.0 |
| Percentage of DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 20 | 15 | 0.0 |
| Percentage of DeferredTaxLiabilitiesFinancingArrangements | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 48 | 58 | 26 | 0.0 |
| Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 13 | 16 | 0.0 |
| Percentage of DeferredTaxLiabilitiesLeasingArrangements | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 1572000.0 | 3650000.0 | 0 |
| Percentage of DeferredTaxLiabilitiesOther | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 |
| Value | 3437000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet | 100.0 |
| Period End | 2020-12-31 |
| Value | 1500000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet | 43.6 |
| Period End | 2020-12-31 |
| Value | 93000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 1500000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent | 1612.9 |
| Period End | 2020-12-31 |
| Value | 11 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 20 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 21 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents | 100.0 |
| Period End | 2020-12-31 |
| Value | 4140000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationDeferredRevenueCurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 49000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationDeferredTaxLiabilities | 100.0 |
| Period End | 2020-12-31 |
| Value | 5705000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationGoodwillNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 900000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsNoncurrent | 100.0 |
| Period End | 2020-12-31 |
| Value | 2200000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsNoncurrent | 244.4 |
| Period End | 2020-12-31 |
| Value | 3080000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsNoncurrent | 342.2 |
| Period End | 2020-12-31 |
| Value | 128000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities | 100.0 |
| Period End | 2020-12-31 |
| Value | 5198000.0 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationPrepaidAndOtherAssetsCurrent | 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 | 2014-12-31 |
| Value | 25 | 19 | 48 | 28 | 20 | 16 | 34 | 27 | 26 | 15 | 25 | 28 | 23 | 16 | 35 | 30 | 21 | 16 | 38 | 21 | 16 | 9.623 | 21 | 0.0 |
| Percentage of EmployeeRelatedLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 |
| Value | 20 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 6.694 | 6.356 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 11 | 12 | 16 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions | 178.0 | 200.9 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 1.971 | 5.829 | 10 | 13 | 23 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-07-16 | 2019-12-30 |
| Value | 70.0 | 0.7 |
| Percentage of EquityMethodInvestmentOwnershipPercentage | 100.0 | 100.0 |
| Period End | 2020-07-16 |
| Value | 0.7 |
| Percentage of EquityMethodInvestmentOwnershipPercentage | 1.0 |
| 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 | 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 |
| Value | 13 | 11 | 8.5 | 7.1 | 16 | 13 | 14 | 8.1 | 8.8 | 8.3 | 8.2 | 8.8 | 8.7 | 8.6 | 8.5 | 8.3 | 8.3 | 7.766 | 7.766 | 7.766 | 0.0 |
| Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 28.0 | 32.0 | 37.0 | 34.0 | 0.4 | 0.43 |
| Percentage of FinancingReceivablePercentPastDue1 | 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 |
| Value | 15.0 | 24.0 | 24.0 | 30.0 | 0.28 | 0.26 |
| Percentage of FinancingReceivablePercentPastDue1 | 53.6 | 75.0 | 64.9 | 88.2 | 70.0 | 60.5 |
| 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 |
| Value | 147 | 140 | 134 | 127 | 120 | 111 | 104 | 96 | 87 | 77 | 68 | 59 | 53 | 47 | 41 | 33 | 28 | 23 | 18 | 13 | 11 | 8.428 | 5.848 | 3.339 | 0.83 |
| Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |