| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue | ▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▃▃▃▃▃▄▄▄▄▄▄▄▅▅▅▅▅▆▇▇▇▇▇▇▇█ | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.3 | 4.3 | 4.4 | 4.4 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.3 | 5.4 | 5.5 | 5.5 | 5.5 | 5.6 | 5.7 | 6.0 | 6.0 | 6.1 | 6.2 | 6.2 | 6.3 | 6.3 | 6.5 | NA | NA | NA | 6.9 | NA | NA | NA |
| us-gaap:CommonStockSharesIssued | ▁▁▁▁▁▁▁▁▂▂▂▂▂▃▂▂▃▃▃▃▃▃▄▄▄▄▄▄▄▅▅▅▅▅▆▆▇▇▇▇▇▇█ | 407.0 | 409.8 | 411.2 | 411.0 | 411.0 | 410.9 | 418.0 | 419.9 | 425.9 | 432.9 | 441.2 | 443.7 | 448.7 | 460.6 | 459.0 | 459.3 | 464.3 | 472.0 | 481.5 | 485.2 | 488.0 | 491.7 | 502.4 | 506.0 | 512.1 | 517.0 | 521.5 | 523.6 | 530.3 | 538.9 | 548.8 | 551.8 | 551.8 | 559.4 | 572.1 | 598.6 | 604.5 | 613.9 | 619.4 | 619.1 | 627.5 | 633.2 | 654.0 | NA | NA | NA | 686.5 | NA | NA | NA |
| us-gaap:CommonStockSharesOutstanding | ▁▁▁▁▁▁▁▁▂▂▂▂▂▃▂▂▃▃▃▃▃▃▄▄▄▄▄▄▄▅▅▅▅▅▆▆▇▇▇▇▇▇█ | 407.0 | 409.8 | 411.2 | 411.0 | 411.0 | 410.9 | 418.0 | 419.9 | 425.9 | 432.9 | 441.2 | 443.7 | 448.7 | 460.6 | 459.0 | 459.3 | 464.3 | 472.0 | 481.5 | 485.2 | 488.0 | 491.7 | 502.4 | 506.0 | 512.1 | 517.0 | 521.5 | 523.6 | 530.3 | 538.9 | 548.8 | 551.8 | 551.8 | 559.4 | 572.1 | 598.6 | 604.5 | 613.9 | 619.4 | 619.1 | 627.5 | 633.2 | 654.0 | NA | NA | NA | 686.5 | NA | NA | NA |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | ▁█ | 411.5 | 414.3 | NA | 414.6 | 413.6 | 418.3 | 424.7 | 426.8 | 432.3 | 439.9 | 445.4 | 449.0 | 459.6 | 463.6 | 459.6 | 465.4 | 472.0 | 483.4 | 483.6 | 490.3 | 493.0 | 503.2 | 508.6 | 513.2 | 519.8 | 525.2 | 526.9 | 531.2 | 539.9 | 549.2 | 555.0 | 555.8 | 558.3 | 569.7 | 590.2 | 604.2 | 613.1 | 621.9 | 621.7 | 627.1 | 635.8 | 652.1 | 658.4 | 661.3 | 671.6 | 684.2 | 693.2 | 701.6 | 702.7 | 708.0 |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | ▁█ | 409.3 | 411.7 | NA | 411.6 | 411.5 | 414.3 | 419.5 | 423.3 | 430.0 | 437.7 | 442.9 | 446.8 | 457.2 | 460.3 | 459.6 | 462.8 | 469.4 | 479.8 | 483.6 | 487.0 | 490.3 | 500.0 | 504.5 | 509.6 | 515.2 | 521.0 | 522.8 | 527.8 | 537.1 | 545.9 | 551.2 | 552.1 | 555.7 | 567.6 | 588.0 | 601.5 | 610.9 | 619.1 | 619.4 | 624.9 | 631.1 | 646.9 | 655.4 | 659.1 | 669.3 | 681.9 | 689.8 | 698.4 | 700.6 | 707.1 |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | ▄▄ | 1.4 | 1.4 | NA | 1.3 | 2.6 | 1.1 | NA | 0.5 | 2.3 | 4.4 | NA | 2.2 | 1.9 | 2.0 | NA | 3.3 | 3.0 | 2.5 | NA | 2.4 | 3.3 | 5.9 | NA | 7.1 | 1.5 | 8.9 | NA | 14.2 | 16.3 | 18.4 | NA | 15.7 | 26.3 | 25.5 | NA | 22.9 | 24.1 | 20.5 | NA | 26.4 | 8.2 | 7.8 | NA | 36.0 | 36.8 | 35.6 | NA | NA | NA | NA |
| us-gaap:EarningsPerShareBasic | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆▄▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆ | 0.54 | 0.44 | 0.43000000000000016 | 0.56 | 0.39 | 0.43 | 0.32 | 0.32 | 1.43 | 0.4 | 0.48 | 0.47 | 0.48 | 0.46 | -2.44 | 0.51 | 0.35 | 0.34 | -0.73 | 0.45 | 0.42 | 0.37 | 0.42 | 0.46 | 0.37 | 0.39 | 0.42 | 0.44 | 0.36 | 0.37 | 0.31 | 0.39 | 0.36 | 0.37 | 0.4 | 0.45 | 0.44 | 0.4 | 0.73 | 0.38 | 0.42 | 0.32 | 0.37 | 0.36 | 0.33 | 0.3 | 0.32 | 0.26 | 0.31 | 0.32 |
| us-gaap:EarningsPerShareDiluted | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆▄▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▆▆▆▆ | 0.54 | 0.44 | 0.41999999999999993 | 0.55 | 0.39 | 0.42 | 0.32 | 0.32 | 1.42 | 0.39 | 0.48 | 0.46 | 0.47 | 0.46 | -2.44 | 0.51 | 0.35 | 0.33 | -0.73 | 0.44 | 0.42 | 0.37 | 0.42 | 0.45 | 0.36 | 0.39 | 0.42 | 0.44 | 0.36 | 0.37 | 0.31 | 0.39 | 0.36 | 0.37 | 0.4 | 0.45 | 0.44 | 0.4 | 0.73 | 0.38 | 0.41 | 0.32 | 0.37 | 0.36 | 0.33 | 0.3 | 0.32 | 0.26 | 0.31 | 0.32 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:AllOtherSegments | ▁▁▁▁▁▂▂▃▅▇▇▇▇█ | 63.3 | 62.6 | 61.09999999999997 | 62.9 | 58.7 | 76.2 | 85.7 | 93.3 | 132.0 | 184.5 | 177.1 | 180.2 | 190.5 | 201.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wu:BusinessSolutions | ▆▆▄▄▁▆▆▇▅▅▆▇▅▆▅▆▆▅▆▆▇▆▇▇▆▆▇█▆ | 99.3 | 96.5 | 89.20000000000003 | 89.1 | 79.4 | 98.4 | 97.0 | 100.6 | 95.6 | 95.6 | 96.8 | 100.2 | 93.1 | 96.7 | 94.3 | 99.4 | 96.6 | 93.6 | 98.8 | 97.2 | 100.8 | 99.2 | 101.9 | 101.2 | 97.6 | 98.0 | 101.2 | 105.8 | 98.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,wu:ConsumerToConsumer | █▄█▇▁▃█▇▇▅ | 1127.1 | 1050.9 | 1121.5 | 1106.5 | 976.6 | 1015.4 | 1125.0 | 1113.0 | 1112.9 | 1056.9 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
|---|
| 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 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AllocatedShareBasedCompensationExpense | ▆▅▄█▁▇█▄▆█▆▆▆█▃▆▅▇▅▅▄▇▅▅▅▆▅▄ | 12.0 | 10.8 | 9.7 | 14.2 | 5.3 | 12.5 | 13.9 | 9.7 | 11.6 | 13.7 | 11.1 | 11.2 | 11.6 | 13.8 | 7.8 | 12.1 | 10.9 | 13.1 | 10.0 | 9.8 | 9.7 | 12.3 | 9.9 | 10.4 | 10.2 | 11.7 | 10.0 | 8.9 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆▄▆▆▆▆▆▆▆▆▇▆▆▆▆▆▆▆▇▇▆▇▇▇▆▆▆ | 224.3 | 200.2 | 204.2 | 219.8 | 164.4 | 205.4 | 109.5 | 157.6 | 620.7 | 192.5 | 227.7 | 210.0 | 245.6 | 196.9 | -1120.5 | 216.7 | 130.9 | 150.7 | -340.9 | 205.0 | 219.7 | 150.5 | 194.7 | 229.5 | 143.9 | 244.7 | 213.5 | 285.7 | 201.3 | 202.0 | 169.7 | 187.4 | 194.0 | 230.9 | 209.8 | 252.0 | 296.7 | 233.3 | 428.5 | 301.5 | 260.1 | 189.6 | 231.6 | 161.6 | NA | NA | NA | NA | NA | NA |
| us-gaap:CostOfGoodsAndServicesSold | ▅▃▅▃▁▂▅▅▆▆█▇██ | 755.0 | 706.0 | 759.1999999999998 | 721.7 | 662.2 | 683.4 | 756.5 | 768.6 | 776.4 | 785.0 | 833.8 | 812.4 | 829.2 | 825.4 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 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:CostsAndExpenses | ▂▂▃▂▁▂▃▃▃▃▃▃▃▃█▃▄▃█▃▃▃▃▃▃▃▃▃▃▃▄▃▃▂▃▃▃▃▃▃▂▂▂▂▂▁▂▂▁▁ | 1034.8 | 977.2 | 1044.7 | 973.3 | 892.9 | 956.8 | 1081.2 | 1109.5 | 1081.6 | 1085.8 | 1130.6 | 1085.2 | 1127.5 | 1124.5 | 1690.8 | 1133.1 | 1164.1 | 1062.9 | 1685.2 | 1099.5 | 1115.4 | 1039.1 | 1098.2 | 1094.7 | 1132.8 | 1048.6 | 1133.8 | 1126.8 | 1127.3 | 1078.8 | 1183.5 | 1113.5 | 1109.1 | 1028.5 | 1138.7 | 1056.0 | 1079.2 | 1060.9 | 1072.9 | 1047.8 | 1015.6 | 970.1 | 1034.9 | 978.4 | 962.4 | 916.9 | 995.4 | 1032.6 | 912.6 | 860.3 |
| us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | ▅▄▄▅▄▄▄▄█▅▅▅▅▅▁▅▄▅▁▅▅▅▅▅▅▅▅▅▅▅▄▅▅▅ | 260.1 | 202.9 | 199.0 | 261.0 | 193.2 | 201.9 | 197.5 | 162.2 | 745.6 | 216.1 | 235.0 | 266.4 | 255.5 | 234.5 | -289.2 | 239.2 | 184.4 | 213.1 | -338.3 | 240.0 | 222.5 | 217.5 | 236.9 | 265.4 | 206.9 | 232.6 | 235.9 | 272.8 | 232.1 | 227.4 | 192.8 | 251.7 | 232.2 | 250.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:IncomeTaxExpenseBenefit | ▂▂▂▂▂▂▂▂▃▂▂▂▂▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂ | 37.6 | 21.1 | 21.9 | 32.4 | 31.3 | 25.2 | 62.1 | 27.2 | 130.8 | 43.0 | 22.9 | 57.8 | 37.9 | 20.9 | 831.7 | 3.6 | 17.9 | 51.4 | 16.7 | 23.1 | 16.9 | 31.8 | 24.6 | 33.1 | 17.6 | 28.7 | 14.4 | 38.7 | 38.3 | 24.4 | 19.4 | 37.3 | 33.6 | 38.2 | 6.9 | 54.3 | 38.9 | 42.8 | -99.7 | 74.2 | 70.2 | 64.5 | 45.7 | 70.2 | 51.3 | 68.1 | 60.4 | 65.5 | 75.5 | 81.3 |
| us-gaap:IncomeTaxesPaidNet | ▆▃▃▆▄▄▅▆█▃▄█▇▃▃▁▄▃▄ | 108.9 | 15.0 | 18.2 | 109.4 | 36.6 | 23.1 | 62.4 | 99.9 | 146.3 | 10.3 | 35.3 | 155.0 | 135.4 | 13.7 | 10.4 | -55.4 | 20.3 | 13.1 | 21.6 | NA | NA | NA | NA | NA | NA | NA | 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 | ▁▂▂▂▂▃▄▄▅▅▅▅▄▄▅▄▄▃▂▆▅▅▅▆▆▆▆▆▆▇██▇█▇▆▇▆▇▇▆▆▇▇▅▅ | 25.6 | 28.4 | 28.1 | 28.2 | 29.3 | 32.9 | 37.5 | 36.2 | 38.6 | 39.7 | 38.2 | 38.4 | 37.5 | 35.5 | 37.9 | 37.2 | 35.7 | 31.3 | 29.6 | 41.4 | 41.0 | 40.5 | 40.8 | 42.2 | 43.1 | 41.8 | 42.4 | 43.2 | 43.4 | 47.6 | 49.9 | 48.8 | 48.0 | 48.9 | 45.5 | 44.6 | 45.1 | 44.4 | 47.6 | 46.7 | 44.2 | 43.4 | 45.2 | 44.8 | 41.1 | 38.8 | NA | NA | NA | NA |
| us-gaap:InterestPaidNet | ▄▁▄▂▄▁▇▂█▂▇▂▆▂ | 32.4 | 19.6 | 33.9 | 22.2 | 35.3 | 18.2 | 49.9 | 23.3 | 54.1 | 24.0 | 50.2 | 24.3 | 45.0 | 23.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆ | 222.5 | 181.8 | 177.1 | 228.6 | 161.9 | 176.7 | 135.4 | 135.0 | 614.8 | 173.1 | 212.1 | 208.6 | 217.6 | 213.6 | -1120.9 | 235.6 | 166.5 | 161.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:NonoperatingIncomeExpense | ▂▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁ | 5.2 | -29.9 | -28.1 | -24.2 | -28.6 | -31.3 | -29.0 | -35.2 | 486.7 | -35.1 | -36.0 | -36.2 | -28.1 | -30.4 | -36.7 | -32.4 | -30.4 | -26.4 | -24.8 | -38.3 | -37.8 | -41.1 | -44.9 | -39.1 | -43.9 | -39.7 | -40.2 | -41.3 | -46.2 | -44.6 | -45.6 | -43.6 | -44.6 | -46.7 | -41.2 | -41.8 | -35.8 | -42.4 | -5.8 | -49.1 | -17.3 | -38.2 | -33.8 | -42.6 | -38.7 | -39.8 | -34.5 | -35.0 | -46.0 | -35.7 |
| us-gaap:OperatingIncomeLoss | ▇▇▇▇▇▇▇▆▇▇▇▇▇▇▂▇▆▇▁▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇██████▇██▇▇ | 254.9 | 232.8 | 227.1 | 285.2 | 221.8 | 233.2 | 226.5 | 197.4 | 258.9 | 251.2 | 271.0 | 302.6 | 283.6 | 264.9 | -252.5 | 271.6 | 214.8 | 239.5 | -313.5 | 278.3 | 260.3 | 258.6 | 281.8 | 304.5 | 250.8 | 272.3 | 276.1 | 314.1 | 278.3 | 272.0 | 238.4 | 295.3 | 276.8 | 296.9 | 286.0 | 365.6 | 345.9 | 332.5 | 358.4 | 363.0 | 350.7 | 312.9 | 322.1 | 351.2 | 311.0 | 315.8 | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax | ▃▇▃▂▂▆▁▅▃▄▅▄█▃ | -2.7 | 28.9 | -10.299999999999999 | -18.2 | -19.1 | 20.7 | -23.5 | 14.5 | -5.9 | 3.9 | 12.3 | 3.7 | 37.4 | -3.1 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherComprehensiveIncomeLossNetOfTax | ▄▅▆▃▄▆▂▅▄▅▅▄▆▃▄▃▂▃▅▃▅▂▃▄▁▇▃▇▄▄▄▂▄▅▂▃▆▃▂█▄ | 1.8 | 18.4 | 27.1 | -8.8 | 2.5 | 28.7 | -25.9 | 22.6 | 5.9 | 19.4 | 15.6 | 1.4 | 28.0 | -16.7 | 0.4 | -18.9 | -35.6 | -11.0 | 14.1 | -11.9 | 14.1 | -35.2 | -17.6 | -2.8 | -45.4 | 40.8 | -8.0 | 51.6 | 7.5 | -1.0 | -3.7 | -27.0 | -4.6 | 18.9 | -28.1 | -17.5 | 25.5 | -14.0 | -23.8 | 61.8 | -3.1 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherNonoperatingIncomeExpense | █▁▁▂▁ | 30.5 | -1.9 | -0.3 | 3.5 | -0.1 | NA | 6.4 | -0.1 | -0.3 | 2.5 | 1.0 | 0.6 | 8.1 | 4.4 | -0.2 | 1.5 | 1.7 | 1.2 | 1.7 | 1.7 | 1.1 | -2.0 | -5.4 | -1.3 | -3.3 | -1.8 | 0.2 | -0.4 | -3.7 | -1.1 | 1.3 | 1.5 | 2.9 | 1.3 | 3.4 | 1.3 | 8.8 | -1.1 | 21.5 | 1.8 | 26.9 | 2.1 | 13.8 | 0.7 | 1.2 | -1.0 | NA | NA | NA | NA |
| us-gaap:ProfitLoss | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆▄▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆ | 222.5 | 181.8 | 177.1 | 228.6 | 161.9 | 176.7 | 135.4 | 135.0 | 614.8 | 173.1 | 212.1 | 208.6 | 217.6 | 213.6 | -1120.9 | 235.6 | 166.5 | 161.7 | -355.0 | 216.9 | 205.6 | 185.7 | 212.3 | 232.3 | 189.3 | 203.9 | 221.5 | 234.1 | 193.8 | 203.0 | 173.4 | 214.4 | 198.6 | 212.0 | 237.9 | 269.5 | 271.2 | 247.3 | 452.3 | 239.7 | 263.2 | 210.2 | 242.6 | 238.4 | 221.0 | 207.9 | 223.7 | 181.0 | 220.2 | 223.9 |
| us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | ▄▃▄▄▁▂▆▄▅▅▇▆▇▆█▇▇▅▇▇▇▅▇▇▇▆▇█▇▆█▇▇▆███▇█▇▇▅▆▆▅▄▆▆▅▄ | 1239.1 | 1166.3 | 1232.6 | 1214.3 | 1055.6 | 1122.6 | 1307.7 | 1238.0 | 1275.0 | 1275.4 | 1401.6 | 1332.2 | 1361.3 | 1346.0 | 1438.3 | 1404.7 | 1378.9 | 1302.4 | 1371.7 | 1377.8 | 1375.7 | 1297.7 | 1380.0 | 1399.2 | 1383.6 | 1320.9 | 1409.9 | 1440.9 | 1405.6 | 1350.8 | 1421.9 | 1408.8 | 1385.9 | 1325.4 | 1424.7 | 1421.6 | 1425.1 | 1393.4 | 1431.3 | 1410.8 | 1366.3 | 1283.0 | 1357.0 | 1329.6 | 1273.4 | 1232.7 | 1314.0 | 1314.1 | 1254.3 | 1201.2 |
| us-gaap:Revenues | ▅▃▄▄▁▃▅▅▆▆▇▇▇▇█▇▇▅▇▇▇▅▇▇▇▅▇█▇▆█▇▇▆███▇█▇▆▅▆▆▄▄▅▅▄▃ | 1289.7 | 1210.0 | 1271.8 | 1258.5 | 1114.7 | 1190.0 | 1307.7 | 1306.9 | 1340.5 | 1337.0 | 1401.6 | 1387.8 | 1411.1 | 1389.4 | 1438.3 | 1404.7 | 1378.9 | 1302.4 | 1371.7 | 1377.8 | 1375.7 | 1297.7 | 1380.0 | 1399.2 | 1383.6 | 1320.9 | 1409.9 | 1440.9 | 1405.6 | 1350.8 | 1421.9 | 1408.8 | 1385.9 | 1325.4 | 1424.7 | 1421.6 | 1425.1 | 1393.4 | 1431.3 | 1410.8 | 1366.3 | 1283.0 | 1357.0 | 1329.6 | 1273.4 | 1232.7 | 1314.0 | 1314.1 | 1254.3 | 1201.2 |
| us-gaap:SellingGeneralAndAdministrativeExpense | ▂▂▂▂▁▂▂▃▂▂▂▂▂▂▃▂▂▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▁▂▁▁▁ | 279.8 | 271.2 | 285.5 | 251.6 | 230.7 | 273.4 | 324.7 | 340.9 | 305.2 | 300.8 | 296.8 | 272.8 | 298.3 | 299.1 | 355.9 | 292.0 | 321.2 | 262.4 | 839.4 | 276.6 | 293.5 | 259.7 | 287.2 | 277.5 | 333.4 | 276.8 | 301.9 | 286.3 | 299.5 | 281.6 | 337.8 | 295.3 | 297.4 | 269.1 | 321.3 | 259.7 | 281.7 | 277.9 | 280.5 | 247.8 | 251.4 | 224.7 | 251.4 | 225.8 | 234.7 | 202.3 | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
|---|
| 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 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | ▄▅▆▄▃▂▃▄▄▅▄▄▄▅▅▇▅▆▅▆▅▅▅▆▇█▇▇▇▇▇▇▆▅▅▅▅▅▄▄▁▁▁ | 8978.1 | 9281.0 | 9496.3 | 8827.2 | 8707.0 | 8365.4 | 8758.5 | 8803.7 | 9043.3 | 9432.0 | 8996.8 | 8989.6 | 9115.6 | 9188.0 | 9231.4 | 9873.6 | 9408.2 | 9486.0 | 9419.6 | 9518.7 | 9394.9 | 9418.3 | 9458.9 | 9815.9 | 10063.8 | 10353.0 | 9890.4 | 9846.6 | 9874.6 | 9922.6 | 10121.3 | 9940.9 | 9589.4 | 9361.7 | 9465.7 | 9355.1 | 9166.0 | 9197.8 | 9069.9 | 8819.7 | 8009.5 | 7887.7 | 7929.2 | NA | NA | NA | 7353.4 | NA | NA | NA |
| us-gaap:Liabilities | ▅▆▇▅▅▄▅▅▆█▇▇▇▇█▆▅▅▄▃▃▃▃▄▅▆▅▅▅▅▆▅▅▄▄▃▃▄▃▄▂▂▁ | 8691.8 | 9062.2 | 9309.7 | 8760.1 | 8780.4 | 8515.1 | 8798.0 | 8823.4 | 9013.1 | 9806.2 | 9306.6 | 9404.9 | 9566.9 | 9563.8 | 9722.8 | 9164.2 | 8747.0 | 8735.7 | 8517.4 | 8131.1 | 8080.5 | 8179.3 | 8054.0 | 8468.7 | 8756.4 | 9003.1 | 8590.0 | 8666.9 | 8804.4 | 8854.9 | 9016.6 | 8890.6 | 8660.8 | 8444.1 | 8525.1 | 8208.4 | 8113.2 | 8230.4 | 8175.1 | 8317.8 | 7630.4 | 7607.4 | 7346.5 | NA | NA | NA | 6999.9 | NA | NA | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | ▄▅▆▄▃▂▃▄▄▅▄▄▄▅▅▇▅▆▅▆▅▅▅▆▇█▇▇▇▇▇▇▆▅▅▅▅▅▄▄▁▁▁ | 8978.1 | 9281.0 | 9496.3 | 8827.2 | 8707.0 | 8365.4 | 8758.5 | 8803.7 | 9043.3 | 9432.0 | 8996.8 | 8989.6 | 9115.6 | 9188.0 | 9231.4 | 9873.6 | 9408.2 | 9486.0 | 9419.6 | 9518.7 | 9394.9 | 9418.3 | 9458.9 | 9815.9 | 10063.8 | 10353.0 | 9890.4 | 9846.6 | 9874.6 | 9922.6 | 10121.3 | 9940.9 | 9589.4 | 9361.7 | 9465.7 | 9355.1 | 9166.0 | 9197.8 | 9069.9 | 8819.7 | 8009.5 | 7887.7 | 7929.2 | NA | NA | NA | 7353.4 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▂▄▃▃▃▂▄▃▃▁▂▁▂▂▁▂▂▃▁▃▂▂▃▃▄▅▅▄▄▄▆▅▃▃▅▃▃▃▃█▆▆▆▆▅▄▄ | 1061.4 | 1502.6 | 1428.2 | 1251.4 | 1181.6 | 1072.8 | 1450.5 | 1390.9 | 1210.2 | 833.1 | 973.4 | 767.6 | 938.3 | 934.3 | 838.2 | 1034.7 | 1059.2 | 1323.3 | 877.5 | 1280.7 | 1162.6 | 1160.0 | 1315.9 | 1414.4 | 1630.5 | 1755.3 | 1783.2 | 1667.4 | 1604.7 | 1694.0 | 2073.1 | 1742.7 | 1395.4 | 1417.1 | 1776.5 | 1433.0 | 1403.8 | 1395.9 | 1370.9 | 2671.1 | 2089.7 | 2215.8 | 2157.4 | 1996.7 | 1746.8 | 1529.8 | 1685.2 | NA | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | ▄█▇▆▅▄▇▇▅▂▃▁▃▃▂▃▄▆▂ | 1073.6 | 1516.6 | 1447.4 | 1263.9 | 1193.6 | 1088.8 | 1456.8 | 1398.2 | 1217.5 | 880.3 | 979.7 | 776.7 | 950.0 | 953.7 | 844.4 | 1034.7 | 1059.2 | 1323.3 | 877.5 | NA | NA | NA | 1315.9 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:PropertyPlantAndEquipmentGross | NA | NA | 810.3 | NA | NA | NA | 803.4 | NA | NA | NA | 972.8 | NA | NA | NA | 849.9 | NA | NA | NA | 820.5 | NA | NA | NA | 770.0 | NA | NA | NA | 684.9 | NA | NA | NA | 638.5 | NA | NA | NA | 580.6 | NA | NA | NA | 627.8 | NA | NA | NA | 580.1 | NA | NA | NA | 539.7 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Building | NA | NA | 0.4 | NA | NA | NA | 0.4 | NA | NA | NA | 88.6 | NA | NA | NA | 88.6 | NA | NA | NA | 88.3 | NA | NA | NA | 87.3 | NA | NA | NA | 87.8 | NA | NA | NA | 82.3 | NA | NA | NA | 80.0 | NA | NA | NA | 80.1 | NA | NA | NA | 77.5 | NA | NA | NA | 75.2 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgress | NA | NA | 2.3 | NA | NA | NA | 3.0 | NA | NA | NA | 0.2 | NA | NA | NA | 10.2 | NA | NA | NA | 5.0 | NA | NA | NA | 13.0 | NA | NA | NA | 2.2 | NA | NA | NA | 9.6 | NA | NA | NA | 0.1 | NA | NA | NA | 1.8 | NA | NA | NA | 2.0 | NA | NA | NA | 1.0 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Equipment | NA | NA | 608.9 | NA | NA | NA | 591.4 | NA | NA | NA | 656.8 | NA | NA | NA | 604.7 | NA | NA | NA | 585.5 | NA | NA | NA | 529.8 | NA | NA | NA | 464.6 | NA | NA | NA | 416.1 | NA | NA | NA | 384.6 | NA | NA | NA | 434.8 | NA | NA | NA | 401.5 | NA | NA | NA | 368.5 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixtures | NA | NA | 45.4 | NA | NA | NA | 49.4 | NA | NA | NA | 51.6 | NA | NA | NA | 42.0 | NA | NA | NA | 40.4 | NA | NA | NA | 39.6 | NA | NA | NA | 32.2 | NA | NA | NA | 33.3 | NA | NA | NA | 33.4 | NA | NA | NA | 33.1 | NA | NA | NA | 30.3 | NA | NA | NA | 28.1 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovements | NA | NA | 153.3 | NA | NA | NA | 159.2 | NA | NA | NA | 158.6 | NA | NA | NA | 87.4 | NA | NA | NA | 84.3 | NA | NA | NA | 83.3 | NA | NA | NA | 81.1 | NA | NA | NA | 80.3 | NA | NA | NA | 65.6 | NA | NA | NA | 61.1 | NA | NA | NA | 51.9 | NA | NA | NA | 50.0 | NA | NA | NA | |
| us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | ▇▇▇▇▇▇▆▇█▇██▇▇▇▇▇▆▆▆▅▅▅▄▄▄▃▃▃▂▂▂▂▂▁▁▁▃▂▂▂▂▁ | 672.8 | 665.7 | 659.9 | 656.9 | 643.7 | 639.3 | 616.5 | 648.7 | 698.9 | 668.8 | 702.4 | 685.8 | 669.3 | 653.6 | 635.7 | 654.7 | 632.1 | 617.3 | 600.0 | 587.2 | 568.8 | 553.1 | 538.2 | 525.2 | 509.1 | 495.0 | 478.5 | 466.4 | 460.0 | 438.6 | 428.6 | 420.6 | 407.2 | 402.2 | 384.5 | 372.8 | 391.0 | 445.2 | 429.7 | 416.8 | 412.7 | 398.0 | 383.6 | NA | NA | NA | 335.4 | NA | NA | NA |
| us-gaap:AmortizationOfIntangibleAssets | ▂▁▁▁▂▂▃▂▃▃▅▃▄▄▄▃▃▄▃▄▄▄▅█▄▄▆▅▆▅▄▆▅▄▄▄▂▄ | 42.4 | 40.6 | 41.1 | 39.9 | 41.6 | 41.7 | 43.9 | 42.8 | 45.8 | 45.6 | 48.8 | 45.3 | 46.3 | 47.4 | 46.2 | 45.7 | 46.1 | 47.8 | 46.1 | 47.7 | 47.1 | 48.1 | 50.9 | 57.4 | 46.8 | 47.4 | 52.4 | 50.3 | 51.7 | 50.9 | 48.2 | 52.7 | 50.2 | 47.5 | 46.3 | 46.5 | 43.0 | 48.6 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:PropertyPlantAndEquipmentNet | ▁▁▁▂▂▃▃▅▅▆██▆▅▅▅▅▅▅▆▅▆▆▆▄▄▅▄▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄ | 141.4 | 144.9 | 150.4 | 156.0 | 167.5 | 173.7 | 186.9 | 212.2 | 224.1 | 229.0 | 270.4 | 266.8 | 241.8 | 215.7 | 214.2 | 211.9 | 215.3 | 209.3 | 220.5 | 224.4 | 221.7 | 226.3 | 231.8 | 224.8 | 201.2 | 202.6 | 206.4 | 205.7 | 208.5 | 214.0 | 209.9 | 208.6 | 203.6 | 198.7 | 196.1 | 196.7 | 196.4 | 196.3 | 198.1 | 193.5 | 196.4 | 194.1 | 196.5 | NA | NA | NA | 204.3 | NA | NA | NA |
| us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 5661.3 | NA | NA | NA | 5886.9 | NA | NA | NA | 5665.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:Goodwill | ▄▄▄▄▄▄▄▄▄▄▅▅▅▅▅████████████████████████▂▂▁▁ | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2566.6 | 2568.5 | 2725.0 | 2725.0 | 2725.0 | 2726.7 | 2727.9 | 3161.1 | 3161.7 | 3162.0 | 3162.0 | 3162.3 | 3162.4 | 3162.7 | 3163.8 | 3168.0 | 3168.3 | 3168.8 | 3169.2 | 3169.5 | 3170.0 | 3170.6 | 3172.0 | 3174.5 | 3176.3 | 3178.5 | 3179.7 | 3185.7 | 3174.1 | 3166.3 | 3198.9 | 2325.8 | 2329.6 | 2159.3 | 2151.7 | NA | NA | NA | 2143.4 | NA | NA | NA |
| us-gaap:IntangibleAssetsNetExcludingGoodwill | ▂▂▂▁▂▂▂▂▃▃▄▄▃▃▃▄▄▄▅▅▅▅▅▆▆▆▆▆▇▇▇██▇█▇▇█▇▂▂▁▁ | 499.7 | 523.0 | 505.0 | 449.3 | 473.9 | 485.1 | 494.9 | 514.5 | 535.5 | 562.7 | 598.2 | 604.5 | 546.5 | 569.2 | 586.3 | 601.1 | 615.9 | 649.6 | 664.2 | 693.4 | 701.5 | 697.1 | 705.0 | 738.1 | 768.3 | 772.0 | 748.1 | 768.9 | 799.0 | 833.5 | 833.8 | 869.6 | 897.6 | 863.3 | 878.9 | 848.5 | 861.6 | 878.3 | 847.4 | 488.1 | 483.0 | 421.1 | 438.0 | NA | NA | NA | 489.2 | NA | NA | NA |
| us-gaap:OperatingLeaseRightOfUseAsset | NA | NA | 189.1 | 192.8 | 195.0 | 190.4 | 199.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OperatingLeaseRightOfUseAsset us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 63.1 | NA | NA | NA | 66.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
|---|
| 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 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LongTermDebt | ▁█ | 2750.0 | 3250.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:DebtAndCapitalLeaseObligations | ▂▃▂▂▂▂▃▃▂▄▄▃▄▃▂▅▅▄▁▃▃▃▃▄▆▆▆▆▆▆█▇▆▆▇▄▅▅▅▇▅▅▃ | 2996.8 | 3230.5 | 3067.2 | 3036.5 | 3085.8 | 3070.1 | 3229.3 | 3248.0 | 3080.2 | 3370.3 | 3433.7 | 3295.0 | 3331.8 | 3143.4 | 3033.6 | 3533.4 | 3627.4 | 3490.9 | 2786.1 | 3224.8 | 3228.5 | 3225.7 | 3225.6 | 3483.8 | 3725.8 | 3728.6 | 3720.4 | 3714.2 | 3754.1 | 3844.1 | 4213.0 | 3968.7 | 3717.3 | 3726.8 | 4029.2 | 3433.0 | 3673.1 | 3633.7 | 3583.2 | 3982.8 | 3585.5 | 3583.3 | 3289.9 | NA | NA | NA | 3048.5 | NA | NA | NA |
| us-gaap:DeferredIncomeTaxLiabilitiesNet | ▄▄▄▄▄▃▃▃▃▃▃▃▃▄▄▃▃▃▁▇▇▇▇██ | 187.7 | 187.2 | 188.9 | 171.7 | 167.9 | 150.6 | 152.1 | 161.3 | 166.3 | 165.3 | 161.1 | 156.3 | 166.2 | 173.8 | 173.0 | 140.9 | 135.7 | 135.3 | 85.9 | 272.8 | 268.1 | 276.7 | 272.6 | 314.3 | 310.1 | NA | 305.0 | 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:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | NA | NA | 44.5 | NA | NA | NA | 45.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 14.8 | NA | NA | NA | 13.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree | NA | NA | 37.0 | NA | NA | NA | 38.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 14.1 | NA | NA | NA | 13.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 13.0 | NA | NA | NA | 13.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 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 | 27.7 | NA | NA | NA | 30.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 12.7 | NA | NA | NA | 14.2 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | NA | NA | 90.3 | NA | NA | NA | 102.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | 61.0 | NA | NA | NA | 74.5 | 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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | ▄▄▄▃▃▂▃▃▃▁▂▁▁▁▁▅▅▆▆██▇█████▇▇▇▇▇▆▆▆▇▇▆▆▅▄▄▅ | 286.3 | 218.8 | 186.6 | 67.1 | -73.4 | -149.7 | -39.5 | -19.7 | 30.2 | -374.2 | -309.8 | -415.3 | -451.3 | -375.8 | -491.4 | 709.4 | 661.2 | 750.3 | 902.2 | 1387.6 | 1314.4 | 1239.0 | 1404.9 | 1347.2 | 1307.4 | 1349.9 | 1300.4 | 1179.7 | 1070.2 | 1067.7 | 1104.7 | 1050.3 | 928.6 | 917.6 | 940.6 | 1146.7 | 1052.8 | 967.4 | 894.8 | 501.9 | 379.1 | 280.3 | 582.7 | NA | NA | NA | 353.5 | NA | NA | NA |
| us-gaap:CommonStockValue | ▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▃▃▃▃▃▄▄▄▄▄▄▄▅▅▅▅▅▆▇▇▇▇▇▇▇█ | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.3 | 4.3 | 4.4 | 4.4 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.8 | 4.9 | 4.9 | 4.9 | 5.0 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.3 | 5.4 | 5.5 | 5.5 | 5.5 | 5.6 | 5.7 | 6.0 | 6.0 | 6.1 | 6.2 | 6.2 | 6.3 | 6.3 | 6.5 | NA | NA | NA | 6.9 | NA | NA | NA |
| us-gaap:AdditionalPaidInCapitalCommonStock | ████▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▁ | 919.5 | 904.0 | 885.1 | 874.9 | 860.5 | 854.7 | 841.2 | 818.6 | 801.3 | 771.1 | 755.6 | 743.7 | 732.1 | 715.4 | 697.8 | 685.2 | 672.1 | 659.7 | 640.9 | 628.7 | 597.3 | 585.3 | 566.5 | 556.1 | 541.6 | 490.9 | 445.4 | 429.2 | 417.3 | 405.2 | 390.9 | 378.1 | 354.0 | 342.9 | 332.8 | 324.9 | 311.0 | 298.9 | 247.1 | 233.1 | 221.6 | 197.2 | 117.4 | NA | NA | NA | 40.7 | NA | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit | ▃▃▃▂▂▁▂▂▂▁▁▁▁▂▁▅▅▅▆██▇██████▇▇█▇▇▇▇██▇▇▆▆▅▇ | -498.0 | -548.2 | -543.1 | -625.3 | -760.2 | -828.2 | -675.9 | -659.4 | -569.7 | -938.0 | -838.8 | -916.8 | -939.9 | -819.8 | -965.9 | 247.9 | 193.9 | 259.7 | 419.3 | 930.9 | 877.2 | 827.9 | 977.3 | 912.3 | 884.2 | 931.9 | 968.7 | 856.2 | 810.1 | 827.1 | 877.3 | 832.0 | 707.4 | 702.8 | 754.7 | 940.3 | 842.8 | 794.9 | 760.0 | 357.3 | 307.7 | 230.2 | 591.6 | NA | NA | NA | 433.2 | NA | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | -543.1 | NA | NA | NA | -675.9 | NA | NA | NA | -838.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 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:AccumulatedOtherComprehensiveIncomeLossNetOfTax | ▆▆▅▄▄▄▃▄▃▃▃▂▂▁▃▃▃▅▅▅▅▄▆▆▆█▇▇▅▅▅▅▆▆▅▆▇▆▇▇▅▅▆ | -139.3 | -141.1 | -159.5 | -186.6 | -177.8 | -180.3 | -209.0 | -183.1 | -205.7 | -211.6 | -231.0 | -246.6 | -248.0 | -276.0 | -227.9 | -228.3 | -209.4 | -173.8 | -162.8 | -176.9 | -165.0 | -179.1 | -143.9 | -126.3 | -123.5 | -78.1 | -118.9 | -110.9 | -162.5 | -170.0 | -169.0 | -165.3 | -138.3 | -133.7 | -152.6 | -124.5 | -107.0 | -132.5 | -118.5 | -94.7 | -156.5 | -153.4 | -132.8 | NA | NA | NA | -127.3 | NA | NA | NA |
| us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | -159.5 | NA | NA | NA | -209.0 | NA | NA | NA | -231.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | █▁ | 12.0 | 10.8 | NA | 14.2 | 5.3 | 12.5 | NA | 9.7 | 11.6 | 13.7 | NA | 11.2 | 11.6 | 13.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▅▅▆▅▅▄▆▆▄▅▆▅▄▄▆█▁▃▅▇▆▅▆▇▆▅▆▆▆▅▆▇▅▅▆█▅▅▆▇▆▆▆▇▆▃ | 173.7 | 175.8 | 291.9 | 237.8 | 235.4 | 112.4 | 249.3 | 262.7 | 163.0 | 239.6 | 302.8 | 219.8 | 166.0 | 132.7 | 312.7 | 447.1 | -110.3 | 86.3 | 220.0 | 336.3 | 272.9 | 212.7 | 266.9 | 338.5 | 253.9 | 211.8 | 270.6 | 325.2 | 253.3 | 196.8 | 277.7 | 333.4 | 240.2 | 237.3 | 325.7 | 413.9 | 230.7 | 215.0 | 292.1 | 376.5 | 254.7 | 251.6 | 284.5 | 383.8 | 251.7 | 74.4 | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▄▅▅▅▅▅▅▅█▅▅▅▅▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▁▅▅▅▅▅▅▅ | -201.1 | -96.2 | -44.7 | -24.5 | -53.0 | 8.8 | -24.7 | -30.0 | 703.7 | -16.7 | -99.0 | -161.1 | -35.8 | -32.9 | 81.5 | -194.8 | -40.7 | -50.6 | -37.2 | -76.8 | -93.8 | -63.3 | 31.5 | -95.5 | -178.0 | -44.4 | -49.7 | -33.0 | -51.1 | 44.4 | -75.1 | -159.5 | -68.8 | -37.9 | -94.4 | -37.7 | -50.3 | -75.8 | -1099.1 | -50.1 | -189.2 | -21.9 | 8.6 | -46.5 | -28.9 | 2.2 | NA | NA | NA | NA |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▅▅▄▅▂▄▅▂▃▅▄▄▅▁▃▄█▁▄▄▃▃▂▄▄▄▄▃▁▆▆▄▁▆▃▄▄▂▇▄▄▄▅▅▄ | -415.6 | -10.4 | -63.7 | -143.0 | -77.6 | -489.2 | -166.0 | -52.0 | -529.5 | -322.3 | -0.8 | -232.0 | -133.9 | 9.5 | -590.7 | -276.8 | -113.1 | 410.1 | -586.0 | -141.4 | -176.5 | -305.3 | -396.9 | -459.1 | -200.7 | -195.3 | -105.1 | -229.5 | -291.5 | -620.3 | 127.8 | 173.4 | -193.1 | -558.8 | 112.2 | -347.0 | -172.5 | -114.2 | -493.2 | 255.0 | -191.6 | -171.3 | -132.4 | -87.4 | -5.8 | -232.0 | NA | NA | NA | NA |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | ▁▅▆▅▅▂▅▆▇▄▆▃▄▅▃▄▂█ | -443.0 | 69.2 | 183.5 | 70.3 | 104.8 | -368.0 | 58.6 | 180.7 | 337.2 | -99.4 | 203.0 | -173.3 | -3.7 | 109.3 | -190.3 | -24.5 | -264.1 | 445.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▅▅▆▅▅▄▆▆▄▅▆▅▄▄▆█▁▃▅▇▆▅▆▇▆▅▆▆▆▅▆▇▅▅▆█▅▅▆▇▆▆▆▇▆▃ | 173.7 | 175.8 | 291.9 | 237.8 | 235.4 | 112.4 | 249.3 | 262.7 | 163.0 | 239.6 | 302.8 | 219.8 | 166.0 | 132.7 | 312.7 | 447.1 | -110.3 | 86.3 | 220.0 | 336.3 | 272.9 | 212.7 | 266.9 | 338.5 | 253.9 | 211.8 | 270.6 | 325.2 | 253.3 | 196.8 | 277.7 | 333.4 | 240.2 | 237.3 | 325.7 | 413.9 | 230.7 | 215.0 | 292.1 | 376.5 | 254.7 | 251.6 | 284.5 | 383.8 | 251.7 | 74.4 | NA | NA | NA | NA |
| us-gaap:NetIncomeLoss | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆ | 222.5 | 181.8 | 177.1 | 228.6 | 161.9 | 176.7 | 135.4 | 135.0 | 614.8 | 173.1 | 212.1 | 208.6 | 217.6 | 213.6 | -1120.9 | 235.6 | 166.5 | 161.7 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:ProfitLoss | ▆▆▆▆▆▆▆▆█▆▆▆▆▆▁▆▆▆▄▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆ | 222.5 | 181.8 | 177.1 | 228.6 | 161.9 | 176.7 | 135.4 | 135.0 | 614.8 | 173.1 | 212.1 | 208.6 | 217.6 | 213.6 | -1120.9 | 235.6 | 166.5 | 161.7 | -355.0 | 216.9 | 205.6 | 185.7 | 212.3 | 232.3 | 189.3 | 203.9 | 221.5 | 234.1 | 193.8 | 203.0 | 173.4 | 214.4 | 198.6 | 212.0 | 237.9 | 269.5 | 271.2 | 247.3 | 452.3 | 239.7 | 263.2 | 210.2 | 242.6 | 238.4 | 221.0 | 207.9 | 223.7 | 181.0 | 220.2 | 223.9 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▄▅▅▅▅▅▅▅█▅▅▅▅▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▁▅▅▅▅▅▅▅ | -201.1 | -96.2 | -44.7 | -24.5 | -53.0 | 8.8 | -24.7 | -30.0 | 703.7 | -16.7 | -99.0 | -161.1 | -35.8 | -32.9 | 81.5 | -194.8 | -40.7 | -50.6 | -37.2 | -76.8 | -93.8 | -63.3 | 31.5 | -95.5 | -178.0 | -44.4 | -49.7 | -33.0 | -51.1 | 44.4 | -75.1 | -159.5 | -68.8 | -37.9 | -94.4 | -37.7 | -50.3 | -75.8 | -1099.1 | -50.1 | -189.2 | -21.9 | 8.6 | -46.5 | -28.9 | 2.2 | NA | NA | NA | NA |
| us-gaap:PaymentsToAcquirePropertyPlantAndEquipment | ▂▁▂▁▂▁▂▁▃▃▇█▇▄▄▃▄▁▃▄▂▃▅▇▂▃▃▃▃▃▄▅▃▃▃▃▂▃▂▂▃▂▃▃▂▁ | 9.2 | 8.7 | 12.0 | 8.6 | 9.6 | 6.3 | 9.2 | 7.5 | 15.3 | 16.1 | 35.5 | 42.9 | 38.1 | 20.2 | 20.2 | 16.7 | 24.3 | 7.9 | 17.4 | 24.0 | 12.8 | 14.6 | 28.7 | 38.8 | 12.5 | 14.4 | 16.9 | 16.6 | 16.1 | 18.2 | 19.5 | 24.9 | 18.5 | 17.3 | 16.6 | 16.9 | 13.2 | 14.2 | 13.4 | 12.8 | 14.3 | 12.3 | 16.2 | 16.3 | 13.7 | 7.1 | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▂▅▅▄▅▂▄▅▂▃▅▄▄▅▁▃▄█▁▄▄▃▃▂▄▄▄▄▃▁▆▆▄▁▆▃▄▄▂▇▄▄▄▅▅▄ | -415.6 | -10.4 | -63.7 | -143.0 | -77.6 | -489.2 | -166.0 | -52.0 | -529.5 | -322.3 | -0.8 | -232.0 | -133.9 | 9.5 | -590.7 | -276.8 | -113.1 | 410.1 | -586.0 | -141.4 | -176.5 | -305.3 | -396.9 | -459.1 | -200.7 | -195.3 | -105.1 | -229.5 | -291.5 | -620.3 | 127.8 | 173.4 | -193.1 | -558.8 | 112.2 | -347.0 | -172.5 | -114.2 | -493.2 | 255.0 | -191.6 | -171.3 | -132.4 | -87.4 | -5.8 | -232.0 | NA | NA | NA | NA |
| us-gaap:ProceedsFromIssuanceOfLongTermDebt | ▁█ | -0.9 | 892.6 | NA | NA | NA | NA | NA | NA | NA | NA | 387.9 | -0.3 | 297.8 | 0.0 | -0.2 | 350.2 | -0.7 | 396.9 | 575.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | 0.0 | NA | NA | NA | 248.0 | NA | NA | NA | 742.8 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:RepaymentsOfLongTermDebt | ▁█ | 500.0 | 650.0 | NA | NA | NA | NA | 324.9 | NA | NA | NA | 7.2 | NA | NA | NA | 500.0 | NA | NA | NA | 1005.4 | NA | NA | NA | 250.0 | 250.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 500.0 | 0.0 | 0.0 | 0.0 | 300.0 | 0.0 | 0.0 | 0.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:PaymentsOfDividendsCommonStock | ██▇▇▇▇▆▆▆▇▆▆▆▇▆▆▆▆▅▅▆▆▆▆▆▆▄▄▄▄▄▄▄▅▅▃▃▄█▂▂▂▂▁▁▁ | 96.8 | 96.7 | 92.5 | 92.9 | 92.5 | 92.4 | 83.7 | 84.2 | 85.5 | 87.4 | 83.9 | 84.5 | 85.8 | 87.5 | 80.3 | 80.5 | 81.5 | 83.3 | 77.1 | 77.7 | 78.1 | 79.3 | 78.0 | 78.5 | 79.5 | 80.5 | 65.3 | 65.5 | 66.8 | 67.6 | 68.6 | 69.0 | 69.3 | 70.3 | 72.0 | 59.9 | 60.7 | 61.6 | 99.2 | 49.6 | 50.3 | 44.7 | 45.8 | 39.4 | 39.6 | 40.5 | NA | NA | NA | NA |
| us-gaap:PaymentsForRepurchaseOfCommonStock | ▂▂▁▁▁▄▂▃▃▃▂▃▄▁▁▂▃▄▂▂▂▄▂▃▃▃▂▃▃▄▂▁▃▄▆▃▃▃▁▃▃█▂▂▄▄ | 76.0 | 84.5 | 1.7 | 0.3 | 0.6 | 237.1 | 68.8 | 142.2 | 170.0 | 171.6 | 51.8 | 108.0 | 241.0 | 11.6 | 13.5 | 102.7 | 167.3 | 219.3 | 81.8 | 85.8 | 100.8 | 233.2 | 69.4 | 128.1 | 166.7 | 147.1 | 45.4 | 132.0 | 132.3 | 185.7 | 59.1 | 24.4 | 126.0 | 190.2 | 349.8 | 114.3 | 155.6 | 146.8 | 0.0 | 145.4 | 160.1 | 498.4 | 70.2 | 94.1 | 217.0 | 200.1 | NA | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems srt:ParentCompany,srt:ReportableLegalEntities | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 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:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems,us-gaap:CreditFacility srt:ParentCompany,srt:ReportableLegalEntities,wu:RevolverParentCo | NA | NA | 2.6e-07 | NA | NA | NA | 1.91e-08 | NA | NA | NA | 2.87e-08 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:ConsolidationItems,us-gaap:SubsequentEventType srt:ParentCompany,srt:ReportableLegalEntities,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 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4200000.0 | 4200000.0 | 4300000.0 | 4300000.0 | 4400000.0 | 4400000.0 | 4500000.0 | 4600000.0 | 4600000.0 | 4600000.0 | 4600000.0 | 4700000.0 | 4800000.0 | 4900000.0 | 4900000.0 | 4900000.0 | 5000000.0 | 5100000.0 | 5100000.0 | 5200000.0 | 5200000.0 | 5200000.0 | 5300000.0 | 5400000.0 | 5500000.0 | 5500000.0 | 5500000.0 | 5600000.0 | 5700000.0 | 6000000.0 | 6000000.0 | 6100000.0 | 6200000.0 | 6200000.0 | 6300000.0 | 6300000.0 | 6500000.0 | 6900000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.1 | 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 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 4100000.0 | 4200000.0 | 4400000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.1 | 0.1 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 407 | 409 | 411 | 411 | 411 | 410 | 418 | 419 | 425 | 432 | 441 | 443 | 448 | 460 | 459 | 459 | 464 | 472 | 481 | 485 | 488 | 491 | 502 | 506 | 512 | 517 | 521 | 523 | 530 | 538 | 548 | 551 | 551 | 559 | 572 | 598 | 604 | 613 | 619 | 619 | 627 | 633 | 654 | 686 |
| Percentage of CommonStockSharesIssued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 411 | 418 | 441 |
| Percentage of CommonStockSharesIssued | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 407 | 409 | 411 | 411 | 411 | 410 | 418 | 419 | 425 | 432 | 441 | 443 | 448 | 460 | 459 | 459 | 464 | 472 | 481 | 485 | 488 | 491 | 502 | 506 | 512 | 517 | 521 | 523 | 530 | 538 | 548 | 551 | 551 | 559 | 572 | 598 | 604 | 613 | 619 | 619 | 627 | 633 | 654 | 686 |
| Percentage of CommonStockSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 411 | 418 | 441 |
| Percentage of CommonStockSharesOutstanding | 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 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 407 | 409 | 411 | 411 | 411 | 410 | 418 | 419 | 425 | 432 | 441 | 443 | 448 | 460 | 459 | 481 | 502 | 521 | 548 | 572 |
| Percentage of CommonStockSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 411 | 414 | 414 | 413 | 418 | 424 | 426 | 432 | 439 | 445 | 449 | 459 | 463 | 459 | 465 | 472 | 483 | 483 | 490 | 493 | 503 | 508 | 513 | 519 | 525 | 526 | 531 | 539 | 549 | 555 | 555 | 558 | 569 | 590 | 604 | 613 | 621 | 621 | 627 | 635 | 652 | 658 | 661 | 671 | 684 | 693 | 701 | 702 | 708 |
| Percentage of WeightedAverageNumberOfDilutedSharesOutstanding | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 409 | 411 | 411 | 411 | 414 | 419 | 423 | 430 | 437 | 442 | 446 | 457 | 460 | 459 | 462 | 469 | 479 | 483 | 487 | 490 | 500 | 504 | 509 | 515 | 521 | 522 | 527 | 537 | 545 | 551 | 552 | 555 | 567 | 588 | 601 | 610 | 619 | 619 | 624 | 631 | 646 | 655 | 659 | 669 | 681 | 689 | 698 | 700 | 707 |
| Percentage of WeightedAverageNumberOfSharesOutstandingBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 1.4 | 1.4 | 1.3 | 2.6 | 1.1 | 0.5 | 2.3 | 4.4 | 2.2 | 1.9 | 2.0 | 3.3 | 3.0 | 2.5 | 2.4 | 3.3 | 5.9 | 7.1 | 1.5 | 8.9 | 14 | 16 | 18 | 15 | 26 | 25 | 22 | 24 | 20 | 26 | 8.2 | 7.8 | 36 | 36 | 35 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 0.54 | 0.44 | 0.43 | 0.56 | 0.39 | 0.43 | 0.32 | 0.32 | 1.43 | 0.4 | 0.48 | 0.47 | 0.48 | 0.46 | -2.44 | 0.51 | 0.35 | 0.34 | -0.73 | 0.45 | 0.42 | 0.37 | 0.42 | 0.46 | 0.37 | 0.39 | 0.42 | 0.44 | 0.36 | 0.37 | 0.31 | 0.39 | 0.36 | 0.37 | 0.4 | 0.45 | 0.44 | 0.4 | 0.73 | 0.38 | 0.42 | 0.32 | 0.37 | 0.36 | 0.33 | 0.3 | 0.32 | 0.26 | 0.31 | 0.32 |
| Percentage of EarningsPerShareBasic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 0.54 | 0.44 | 0.42 | 0.55 | 0.39 | 0.42 | 0.32 | 0.32 | 1.42 | 0.39 | 0.48 | 0.46 | 0.47 | 0.46 | -2.44 | 0.51 | 0.35 | 0.33 | -0.73 | 0.44 | 0.42 | 0.37 | 0.42 | 0.45 | 0.36 | 0.39 | 0.42 | 0.44 | 0.36 | 0.37 | 0.31 | 0.39 | 0.36 | 0.37 | 0.4 | 0.45 | 0.44 | 0.4 | 0.73 | 0.38 | 0.41 | 0.32 | 0.37 | 0.36 | 0.33 | 0.3 | 0.32 | 0.26 | 0.31 | 0.32 |
| Percentage of EarningsPerShareDiluted | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 12 | 10 | 9.7 | 14 | 5.3 | 12 | 13 | 9.7 | 11 | 13 | 11 | 11 | 11 | 13 | 7.8 | 12 | 10 | 13 | 10.0 | 9.8 | 9.7 | 12 | 9.9 | 10 | 10 | 11 | 10.0 | 8.9 |
| 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 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.0 | 0.9 | 0.0 | 1.2 | 0.5 | 1.1 | 1.1 | 0.8 | 0.9 | 1.1 | 0.8 | 0.8 | 0.9 | 1.0 | 0.5 | 0.9 | 0.8 | 1.0 | 0.7 | 0.7 | 0.7 | 0.9 | 0.7 | 0.7 | 0.7 | 0.9 | 0.7 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 224 | 200 | 204 | 219 | 164 | 205 | 109 | 157 | 620 | 192 | 227 | 210 | 245 | 196 | -1120.5 | 216 | 130 | 150 | -340.9 | 205 | 219 | 150 | 194 | 229 | 143 | 244 | 213 | 285 | 201 | 202 | 169 | 187 | 194 | 230 | 209 | 252 | 296 | 233 | 428 | 301 | 260 | 189 | 231 | 161 |
| Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.1 | 17.2 | 0.0 | 18.1 | 15.6 | 18.3 | 8.4 | 12.7 | 48.7 | 15.1 | 16.2 | 15.8 | 18.0 | 14.6 | -77.9 | 15.4 | 9.5 | 11.6 | -24.9 | 14.9 | 16.0 | 11.6 | 14.1 | 16.4 | 10.4 | 18.5 | 15.1 | 19.8 | 14.3 | 15.0 | 11.9 | 13.3 | 14.0 | 17.4 | 14.7 | 17.7 | 20.8 | 16.7 | 29.9 | 21.4 | 19.0 | 14.8 | 17.1 | 12.2 |
| 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 |
| Value | 755 | 706 | 759 | 721 | 662 | 683 | 756 | 768 | 776 | 785 | 833 | 812 | 829 | 825 |
| Percentage of CostOfGoodsAndServicesSold | 100.0 | 100.0 | 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 | 60.9 | 60.5 | 0.0 | 59.4 | 62.7 | 60.9 | 57.8 | 62.1 | 60.9 | 61.5 | 59.5 | 61.0 | 60.9 | 61.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 1034 | 977 | 1044 | 973 | 892 | 956 | 1081 | 1109 | 1081 | 1085 | 1130 | 1085 | 1127 | 1124 | 1690 | 1133 | 1164 | 1062 | 1685 | 1099 | 1115 | 1039 | 1098 | 1094 | 1132 | 1048 | 1133 | 1126 | 1127 | 1078 | 1183 | 1113 | 1109 | 1028 | 1138 | 1056 | 1079 | 1060 | 1072 | 1047 | 1015 | 970 | 1034 | 978 | 962 | 916 | 995 | 1032 | 912 | 860 |
| Percentage of CostsAndExpenses | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 83.5 | 83.8 | 0.0 | 80.2 | 84.6 | 85.2 | 82.7 | 89.6 | 84.8 | 85.1 | 80.7 | 81.5 | 82.8 | 83.5 | 117.6 | 80.7 | 84.4 | 81.6 | 122.9 | 79.8 | 81.1 | 80.1 | 79.6 | 78.2 | 81.9 | 79.4 | 80.4 | 78.2 | 80.2 | 79.9 | 83.2 | 79.0 | 80.0 | 77.6 | 79.9 | 74.3 | 75.7 | 76.1 | 75.0 | 74.3 | 74.3 | 75.6 | 76.3 | 73.6 | 75.6 | 74.4 | 75.8 | 78.6 | 72.8 | 71.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 260 | 202 | 199 | 261 | 193 | 201 | 197 | 162 | 745 | 216 | 235 | 266 | 255 | 234 | -289.2 | 239 | 184 | 213 | -338.3 | 240 | 222 | 217 | 236 | 265 | 206 | 232 | 235 | 272 | 232 | 227 | 192 | 251 | 232 | 250 |
| Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 21.0 | 17.4 | 0.0 | 21.5 | 18.3 | 18.0 | 15.1 | 13.1 | 58.5 | 16.9 | 16.8 | 20.0 | 18.8 | 17.4 | -20.1 | 17.0 | 13.4 | 16.4 | -24.7 | 17.4 | 16.2 | 16.8 | 17.2 | 19.0 | 15.0 | 17.6 | 16.7 | 18.9 | 16.5 | 16.8 | 13.6 | 17.9 | 16.8 | 18.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 37 | 21 | 21 | 32 | 31 | 25 | 62 | 27 | 130 | 43 | 22 | 57 | 37 | 20 | 831 | 3.6 | 17 | 51 | 16 | 23 | 16 | 31 | 24 | 33 | 17 | 28 | 14 | 38 | 38 | 24 | 19 | 37 | 33 | 38 | 6.9 | 54 | 38 | 42 | -99.7 | 74 | 70 | 64 | 45 | 70 | 51 | 68 | 60 | 65 | 75 | 81 |
| Percentage of IncomeTaxExpenseBenefit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 3.0 | 1.8 | 0.0 | 2.7 | 3.0 | 2.2 | 4.7 | 2.2 | 10.3 | 3.4 | 1.6 | 4.3 | 2.8 | 1.6 | 57.8 | 0.3 | 1.3 | 3.9 | 1.2 | 1.7 | 1.2 | 2.5 | 1.8 | 2.4 | 1.3 | 2.2 | 1.0 | 2.7 | 2.7 | 1.8 | 1.4 | 2.6 | 2.4 | 2.9 | 0.5 | 3.8 | 2.7 | 3.1 | -7.0 | 5.3 | 5.1 | 5.0 | 3.4 | 5.3 | 4.0 | 5.5 | 4.6 | 5.0 | 6.0 | 6.8 |
| 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 |
| Value | 108 | 15 | 18 | 109 | 36 | 23 | 62 | 99 | 146 | 10 | 35 | 155 | 135 | 13 | 10 | -55.4 | 20 | 13 | 21 |
| Percentage of IncomeTaxesPaidNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 8.8 | 1.3 | 0.0 | 9.0 | 3.5 | 2.1 | 4.8 | 8.1 | 11.5 | 0.8 | 2.5 | 11.6 | 9.9 | 1.0 | 0.7 | -3.9 | 1.5 | 1.0 | 1.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 25 | 28 | 28 | 28 | 29 | 32 | 37 | 36 | 38 | 39 | 38 | 38 | 37 | 35 | 37 | 37 | 35 | 31 | 29 | 41 | 41 | 40 | 40 | 42 | 43 | 41 | 42 | 43 | 43 | 47 | 49 | 48 | 48 | 48 | 45 | 44 | 45 | 44 | 47 | 46 | 44 | 43 | 45 | 44 | 41 | 38 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2.1 | 2.4 | 0.0 | 2.3 | 2.8 | 2.9 | 2.9 | 2.9 | 3.0 | 3.1 | 2.7 | 2.9 | 2.8 | 2.6 | 2.6 | 2.6 | 2.6 | 2.4 | 2.2 | 3.0 | 3.0 | 3.1 | 3.0 | 3.0 | 3.1 | 3.2 | 3.0 | 3.0 | 3.1 | 3.5 | 3.5 | 3.5 | 3.5 | 3.7 | 3.2 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | 3.2 | 3.4 | 3.3 | 3.4 | 3.2 | 3.1 |
| 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 | 32 | 19 | 33 | 22 | 35 | 18 | 49 | 23 | 54 | 24 | 50 | 24 | 45 | 23 |
| Percentage of InterestPaidNet | 100.0 | 100.0 | 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 | 2.6 | 1.7 | 0.0 | 1.8 | 3.3 | 1.6 | 3.8 | 1.9 | 4.2 | 1.9 | 3.6 | 1.8 | 3.3 | 1.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 222 | 181 | 177 | 228 | 161 | 176 | 135 | 135 | 614 | 173 | 212 | 208 | 217 | 213 | -1120.9 | 235 | 166 | 161 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 0.0 | 18.8 | 15.3 | 15.7 | 10.4 | 10.9 | 48.2 | 13.6 | 15.1 | 15.7 | 16.0 | 15.9 | -77.9 | 16.8 | 12.1 | 12.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 5.2 | -29.9 | -28.1 | -24.2 | -28.6 | -31.3 | -29.0 | -35.2 | 486 | -35.1 | -36.0 | -36.2 | -28.1 | -30.4 | -36.7 | -32.4 | -30.4 | -26.4 | -24.8 | -38.3 | -37.8 | -41.1 | -44.9 | -39.1 | -43.9 | -39.7 | -40.2 | -41.3 | -46.2 | -44.6 | -45.6 | -43.6 | -44.6 | -46.7 | -41.2 | -41.8 | -35.8 | -42.4 | -5.8 | -49.1 | -17.3 | -38.2 | -33.8 | -42.6 | -38.7 | -39.8 | -34.5 | -35.0 | -46.0 | -35.7 |
| Percentage of NonoperatingIncomeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.4 | -2.6 | 0.0 | -2.0 | -2.7 | -2.8 | -2.2 | -2.8 | 38.2 | -2.8 | -2.6 | -2.7 | -2.1 | -2.3 | -2.6 | -2.3 | -2.2 | -2.0 | -1.8 | -2.8 | -2.7 | -3.2 | -3.3 | -2.8 | -3.2 | -3.0 | -2.9 | -2.9 | -3.3 | -3.3 | -3.2 | -3.1 | -3.2 | -3.5 | -2.9 | -2.9 | -2.5 | -3.0 | -0.4 | -3.5 | -1.3 | -3.0 | -2.5 | -3.2 | -3.0 | -3.2 | -2.6 | -2.7 | -3.7 | -3.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 254 | 232 | 227 | 285 | 221 | 233 | 226 | 197 | 258 | 251 | 271 | 302 | 283 | 264 | -252.5 | 271 | 214 | 239 | -313.5 | 278 | 260 | 258 | 281 | 304 | 250 | 272 | 276 | 314 | 278 | 272 | 238 | 295 | 276 | 296 | 286 | 365 | 345 | 332 | 358 | 363 | 350 | 312 | 322 | 351 | 311 | 315 |
| Percentage of OperatingIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 20.6 | 20.0 | 0.0 | 23.5 | 21.0 | 20.8 | 17.3 | 15.9 | 20.3 | 19.7 | 19.3 | 22.7 | 20.8 | 19.7 | -17.6 | 19.3 | 15.6 | 18.4 | -22.9 | 20.2 | 18.9 | 19.9 | 20.4 | 21.8 | 18.1 | 20.6 | 19.6 | 21.8 | 19.8 | 20.1 | 16.8 | 21.0 | 20.0 | 22.4 | 20.1 | 25.7 | 24.3 | 23.9 | 25.0 | 25.7 | 25.7 | 24.4 | 23.7 | 26.4 | 24.4 | 25.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 |
| Value | 254 | 232 | 239 | 294 | 227 | 243 | 243 | 288 | 266 | 251 | 271 | 302 | 283 | 264 | 257 | 289 | 298 | 253 | 270 | 298 | 277 | 258 |
| Percentage of OperatingIncomeLoss | 100.0 | 100.0 | 105.3 | 103.2 | 102.3 | 104.5 | 107.3 | 146.4 | 102.9 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | -102.1 | 106.6 | 139.1 | 106.0 | -86.3 | 107.2 | 106.6 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 20.6 | 20.0 | 0.0 | 24.2 | 21.5 | 21.7 | 18.6 | 23.3 | 20.9 | 19.7 | 19.3 | 22.7 | 20.8 | 19.7 | 17.9 | 20.6 | 21.7 | 19.5 | 19.7 | 21.7 | 20.2 | 19.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 10 | 14 | 9.7 | 12 | 12 | 19 | 4.0 | 8.4 | 5.6 | 9.3 | 3.3 | 10 | 16 | 20 |
| Percentage of OperatingIncomeLoss | 4.0 | 6.1 | 4.3 | 4.4 | 5.8 | 8.5 | 1.8 | 4.3 | 2.2 | 3.7 | 1.2 | 3.5 | 5.7 | 7.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.8 | 1.2 | 0.0 | 1.0 | 1.2 | 1.8 | 0.3 | 0.7 | 0.4 | 0.7 | 0.2 | 0.8 | 1.2 | 1.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 10 | 12 | -0.2 | 9.4 | 1.3 | 13 | 11 | 16 | 10 | 8.6 | 5.2 | 14 | 1.1 | 2.8 | -3.0 | 9.0 | 5.3 | 2.3 | 10 | 3.4 | 5.1 | 2.4 | 3.8 | -2.7 | -0.4 | 2.1 | -5.0 | -0.2 | -3.3 |
| Percentage of OperatingIncomeLoss | 4.3 | 5.4 | -0.1 | 3.3 | 0.6 | 6.0 | 4.9 | 8.5 | 4.1 | 3.4 | 1.9 | 4.7 | 0.4 | 1.1 | 1.2 | 3.3 | 2.5 | 1.0 | -3.3 | 1.2 | 2.0 | 0.9 | 1.3 | -0.9 | -0.2 | 0.8 | -1.8 | -0.1 | -1.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.9 | 1.1 | 0.0 | 0.8 | 0.1 | 1.2 | 0.8 | 1.3 | 0.8 | 0.7 | 0.4 | 1.1 | 0.1 | 0.2 | -0.2 | 0.6 | 0.4 | 0.2 | 0.7 | 0.2 | 0.4 | 0.2 | 0.3 | -0.2 | -0.0 | 0.2 | -0.4 | -0.0 | -0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments wu:BusinessSolutions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 233 | 206 | 229 | 272 | 212 | 209 | 228 | 263 | 250 | 233 |
| Percentage of OperatingIncomeLoss | 91.7 | 88.5 | 101.1 | 95.5 | 95.9 | 90.0 | 100.7 | 133.6 | 96.6 | 92.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.9 | 17.7 | 0.0 | 22.4 | 20.2 | 18.7 | 17.4 | 21.3 | 19.6 | 18.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments wu:ConsumerToConsumer | 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 | -2.7 | 28 | -10.299999999999999 | -18.2 | -19.1 | 20 | -23.5 | 14 | -5.9 | 3.9 | 12 | 3.7 | 37 | -3.1 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax | 100.0 | 100.0 | 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 | -0.2 | 2.5 | 0.0 | -1.5 | -1.8 | 1.8 | -1.8 | 1.2 | -0.5 | 0.3 | 0.9 | 0.3 | 2.7 | -0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | 1.8 | 18 | 27 | -8.8 | 2.5 | 28 | -25.9 | 22 | 5.9 | 19 | 15 | 1.4 | 28 | -16.7 | 0.4 | -18.9 | -35.6 | -11.0 | 14 | -11.9 | 14 | -35.2 | -17.6 | -2.8 | -45.4 | 40 | -8.0 | 51 | 7.5 | -1.0 | -3.7 | -27.0 | -4.6 | 18 | -28.1 | -17.5 | 25 | -14.0 | -23.8 | 61 | -3.1 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1.6 | 0.0 | -0.7 | 0.2 | 2.6 | -2.0 | 1.8 | 0.5 | 1.5 | 1.1 | 0.1 | 2.1 | -1.2 | 0.0 | -1.3 | -2.6 | -0.8 | 1.0 | -0.9 | 1.0 | -2.7 | -1.3 | -0.2 | -3.3 | 3.1 | -0.6 | 3.6 | 0.5 | -0.1 | -0.3 | -1.9 | -0.3 | 1.4 | -2.0 | -1.2 | 1.8 | -1.0 | -1.7 | 4.4 | -0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 1.8 | 18 | -8.8 | 2.5 | 28 | 22 | 5.9 | 19 | 1.4 | 28 | -16.7 |
| Percentage of OtherComprehensiveIncomeLossNetOfTax | 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 | 1.6 | -0.7 | 0.2 | 2.6 | 1.8 | 0.5 | 1.5 | 0.1 | 2.1 | -1.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 30 | -1.9 | -0.3 | 3.5 | -0.1 | 6.4 | -0.1 | -0.3 | 2.5 | 1.0 | 0.6 | 8.1 | 4.4 | -0.2 | 1.5 | 1.7 | 1.2 | 1.7 | 1.7 | 1.1 | -2.0 | -5.4 | -1.3 | -3.3 | -1.8 | 0.2 | -0.4 | -3.7 | -1.1 | 1.3 | 1.5 | 2.9 | 1.3 | 3.4 | 1.3 | 8.8 | -1.1 | 21 | 1.8 | 26 | 2.1 | 13 | 0.7 | 1.2 | -1.0 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2.5 | -0.2 | 0.0 | 0.3 | -0.0 | 0.5 | -0.0 | -0.0 | 0.2 | 0.1 | 0.0 | 0.6 | 0.3 | -0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | -0.2 | -0.4 | -0.1 | -0.2 | -0.1 | 0.0 | -0.0 | -0.3 | -0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.1 | 0.6 | -0.1 | 1.5 | 0.1 | 2.0 | 0.2 | 1.0 | 0.1 | 0.1 | -0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 222 | 181 | 177 | 228 | 161 | 176 | 135 | 135 | 614 | 173 | 212 | 208 | 217 | 213 | -1120.9 | 235 | 166 | 161 | -355.0 | 216 | 205 | 185 | 212 | 232 | 189 | 203 | 221 | 234 | 193 | 203 | 173 | 214 | 198 | 212 | 237 | 269 | 271 | 247 | 452 | 239 | 263 | 210 | 242 | 238 | 221 | 207 | 223 | 181 | 220 | 223 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 0.0 | 18.8 | 15.3 | 15.7 | 10.4 | 10.9 | 48.2 | 13.6 | 15.1 | 15.7 | 16.0 | 15.9 | -77.9 | 16.8 | 12.1 | 12.4 | -25.9 | 15.7 | 14.9 | 14.3 | 15.4 | 16.6 | 13.7 | 15.4 | 15.7 | 16.2 | 13.8 | 15.0 | 12.2 | 15.2 | 14.3 | 16.0 | 16.7 | 19.0 | 19.0 | 17.7 | 31.6 | 17.0 | 19.3 | 16.4 | 17.9 | 17.9 | 17.4 | 16.9 | 17.0 | 13.8 | 17.6 | 18.6 |
| 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 222 | 181 | 228 | 161 | 176 | 135 | 614 | 173 | 208 | 217 | 213 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 18.8 | 15.3 | 15.7 | 10.9 | 48.2 | 13.6 | 15.7 | 16.0 | 15.9 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 1239 | 1166 | 1232 | 1214 | 1055 | 1122 | 1307 | 1238 | 1275 | 1275 | 1401 | 1332 | 1361 | 1346 | 1438 | 1404 | 1378 | 1302 | 1371 | 1377 | 1375 | 1297 | 1380 | 1399 | 1383 | 1320 | 1409 | 1440 | 1405 | 1350 | 1421 | 1408 | 1385 | 1325 | 1424 | 1421 | 1425 | 1393 | 1431 | 1410 | 1366 | 1283 | 1357 | 1329 | 1273 | 1232 | 1314 | 1314 | 1254 | 1201 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 38 | 37 | 36 | 38 | 33 | 47 | 54 | 58 | 94 | 149 | 143 | 149 | 159 | 169 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 3.1 | 3.2 | 3.0 | 3.1 | 3.2 | 4.2 | 4.1 | 4.8 | 7.4 | 11.7 | 10.3 | 11.2 | 11.7 | 12.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 3.1 | 3.2 | 3.0 | 3.1 | 3.2 | 4.2 | 4.1 | 4.8 | 7.4 | 11.7 | 10.3 | 11.2 | 11.7 | 12.6 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments | 100.0 | 100.0 | 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 | 1109 | 1038 | 1108 | 1090 | 948 | 986 | 1099 | 1082 | 1088 | 1033 | 1106 | 1084 | 1109 | 1083 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 89.5 | 89.0 | 89.9 | 89.8 | 89.8 | 87.8 | 84.1 | 87.4 | 85.3 | 81.1 | 78.9 | 81.4 | 81.5 | 80.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 89.5 | 89.0 | 89.9 | 89.8 | 89.8 | 87.8 | 84.1 | 87.4 | 85.3 | 81.1 | 78.9 | 81.4 | 81.5 | 80.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers | 100.0 | 100.0 | 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 | 75 | 73 | 71 | 69 | 57 | 71 | 72 | 77 | 72 | 73 | 74 | 80 | 73 | 74 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 6.1 | 6.3 | 5.8 | 5.7 | 5.4 | 6.4 | 5.5 | 6.3 | 5.7 | 5.7 | 5.3 | 6.0 | 5.4 | 5.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 6.1 | 6.3 | 5.8 | 5.7 | 5.4 | 6.4 | 5.5 | 6.3 | 5.7 | 5.7 | 5.3 | 6.0 | 5.4 | 5.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices | 100.0 | 100.0 | 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 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 18 | 19 | 18 | 18 | 18 | 19 | 18 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 1.4 | 1.3 | 1.4 | 1.6 | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.3 | 1.4 | 1.4 | 1.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 1.4 | 1.3 | 1.4 | 1.6 | 1.5 | 1.4 | 1.5 | 1.5 | 1.5 | 1.3 | 1.4 | 1.4 | 1.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:OtherServices | 100.0 | 100.0 | 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 | 0.2 | 0.3 | 0.3 | 0.4 | 0.4 | 0.3 | 0.4 | 0.4 | 0.4 | 0.3 | 0.2 | 0.4 | 0.5 | 0.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments wu:EastAsiaAndOceania | 100.0 | 100.0 | 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 | 1.1 | 1.1 | 1.5 | 0.8 | 0.5 | 0.8 | 0.9 | 0.8 | 0.9 | 0.6 | 0.6 | 0.9 | 0.8 | 0.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments wu:EuropeAndRussiaCis | 100.0 | 100.0 | 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 | 17 | 16 | 19 | 15 | 23 | 29 | 34 | 32 | 33 | 30 | 34 | 42 | 45 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.5 | 1.5 | 1.4 | 1.6 | 1.5 | 2.1 | 2.2 | 2.8 | 2.5 | 2.6 | 2.2 | 2.6 | 3.1 | 3.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.5 | 1.5 | 1.4 | 1.6 | 1.5 | 2.1 | 2.2 | 2.8 | 2.5 | 2.6 | 2.2 | 2.6 | 3.1 | 3.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments wu:LatinAmericaAndCaribbean | 100.0 | 100.0 | 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 | 0.1 | 0.1 | 0.2 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 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 RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments wu:MiddleEastAfricaAndSouthAsia | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 18 | 18 | 17 | 17 | 17 | 22 | 23 | 23 | 61 | 115 | 112 | 112 | 115 | 123 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.5 | 1.6 | 1.5 | 1.4 | 1.6 | 2.0 | 1.8 | 1.9 | 4.8 | 9.0 | 8.0 | 8.5 | 8.5 | 9.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.5 | 1.6 | 1.5 | 1.4 | 1.6 | 2.0 | 1.8 | 1.9 | 4.8 | 9.0 | 8.0 | 8.5 | 8.5 | 9.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments wu:NorthAmericaMember | 100.0 | 100.0 | 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 | 68 | 66 | 73 | 69 | 55 | 59 | 66 | 64 | 65 | 66 | 74 | 74 | 76 | 78 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 5.5 | 5.7 | 6.0 | 5.7 | 5.3 | 5.3 | 5.1 | 5.2 | 5.1 | 5.2 | 5.3 | 5.6 | 5.6 | 5.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 5.5 | 5.7 | 6.0 | 5.7 | 5.3 | 5.3 | 5.1 | 5.2 | 5.1 | 5.2 | 5.3 | 5.6 | 5.6 | 5.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers wu:EastAsiaAndOceania | 100.0 | 100.0 | 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 | 364 | 338 | 369 | 358 | 301 | 300 | 348 | 338 | 339 | 323 | 348 | 349 | 356 | 345 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 29.4 | 29.0 | 30.0 | 29.5 | 28.5 | 26.8 | 26.6 | 27.4 | 26.7 | 25.3 | 24.9 | 26.2 | 26.2 | 25.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 29.4 | 29.0 | 30.0 | 29.5 | 28.5 | 26.8 | 26.6 | 27.4 | 26.7 | 25.3 | 24.9 | 26.2 | 26.2 | 25.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers wu:EuropeAndRussiaCis | 100.0 | 100.0 | 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 | 92 | 86 | 93 | 78 | 54 | 84 | 101 | 99 | 98 | 95 | 104 | 95 | 95 | 97 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 7.5 | 7.4 | 7.6 | 6.4 | 5.1 | 7.5 | 7.8 | 8.0 | 7.7 | 7.5 | 7.4 | 7.2 | 7.0 | 7.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 7.5 | 7.4 | 7.6 | 6.4 | 5.1 | 7.5 | 7.8 | 8.0 | 7.7 | 7.5 | 7.4 | 7.2 | 7.0 | 7.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers wu:LatinAmericaAndCaribbean | 100.0 | 100.0 | 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 | 166 | 159 | 166 | 169 | 137 | 156 | 164 | 164 | 159 | 153 | 164 | 157 | 165 | 166 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 13.5 | 13.7 | 13.5 | 14.0 | 13.0 | 14.0 | 12.5 | 13.3 | 12.5 | 12.0 | 11.8 | 11.8 | 12.1 | 12.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 13.5 | 13.7 | 13.5 | 14.0 | 13.0 | 14.0 | 12.5 | 13.3 | 12.5 | 12.0 | 11.8 | 11.8 | 12.1 | 12.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers wu:MiddleEastAfricaAndSouthAsia | 100.0 | 100.0 | 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 | 417 | 386 | 406 | 414 | 399 | 384 | 418 | 415 | 424 | 395 | 414 | 407 | 416 | 394 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 33.7 | 33.1 | 33.0 | 34.2 | 37.9 | 34.3 | 32.0 | 33.5 | 33.3 | 31.0 | 29.6 | 30.6 | 30.6 | 29.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 33.7 | 33.1 | 33.0 | 34.2 | 37.9 | 34.3 | 32.0 | 33.5 | 33.3 | 31.0 | 29.6 | 30.6 | 30.6 | 29.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers wu:NorthAmericaMember | 100.0 | 100.0 | 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 | 16 | 16 | 16 | 14 | 12 | 16 | 17 | 17 | 16 | 17 | 17 | 17 | 17 | 17 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 1.4 | 1.3 | 1.2 | 1.2 | 1.5 | 1.3 | 1.4 | 1.3 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.3 | 1.4 | 1.3 | 1.2 | 1.2 | 1.5 | 1.3 | 1.4 | 1.3 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices wu:EastAsiaAndOceania | 100.0 | 100.0 | 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 | 33 | 34 | 32 | 30 | 26 | 31 | 30 | 32 | 31 | 31 | 31 | 35 | 30 | 32 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.7 | 2.9 | 2.7 | 2.5 | 2.5 | 2.8 | 2.4 | 2.6 | 2.5 | 2.5 | 2.3 | 2.6 | 2.2 | 2.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 2.7 | 2.9 | 2.7 | 2.5 | 2.5 | 2.8 | 2.4 | 2.6 | 2.5 | 2.5 | 2.3 | 2.6 | 2.2 | 2.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices wu:EuropeAndRussiaCis | 100.0 | 100.0 | 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 | 0.8 | 0.8 | 0.7 | 0.5 | 0.6 | 0.6 | 0.6 | 0.8 | 1.0 | 1.0 | 1.1 | 1.0 | 0.8 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices wu:LatinAmericaAndCaribbean | 100.0 | 100.0 | 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 |
| Value | 0.5 | 0.5 | 0.4 | 0.3 | 0.3 | 0.5 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.7 | 0.3 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices wu:MiddleEastAfricaAndSouthAsia | 100.0 | 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 | 23 | 21 | 21 | 23 | 17 | 22 | 23 | 26 | 23 | 22 | 23 | 25 | 23 | 24 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.9 | 1.8 | 1.7 | 1.9 | 1.6 | 2.0 | 1.8 | 2.2 | 1.8 | 1.7 | 1.6 | 1.9 | 1.7 | 1.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.9 | 1.8 | 1.7 | 1.9 | 1.6 | 2.0 | 1.8 | 2.2 | 1.8 | 1.7 | 1.6 | 1.9 | 1.7 | 1.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices wu:NorthAmericaMember | 100.0 | 100.0 | 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 | 0.2 | 0.4 | 0.4 | 0.5 | 0.2 | 0.7 | 0.9 | 1.3 | 1.0 | 0.9 | 0.7 | 1.2 | 1.0 | 1.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:OtherServices wu:EuropeAndRussiaCis | 100.0 | 100.0 | 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 | 2.1 | 1.8 | 1.8 | 2.0 | 2.0 | 2.1 | 3.8 | 3.9 | 4.1 | 3.5 | 3.6 | 3.2 | 3.7 | 3.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.2 | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.3 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 0.2 | 0.2 | 0.1 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.3 | 0.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:OtherServices wu:LatinAmericaAndCaribbean | 100.0 | 100.0 | 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 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 1.2 | 1.1 | 1.2 | 1.4 | 1.3 | 1.0 | 1.1 | 1.1 | 1.1 | 1.0 | 1.1 | 1.1 | 1.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.2 | 1.2 | 1.1 | 1.2 | 1.4 | 1.3 | 1.0 | 1.1 | 1.1 | 1.1 | 1.0 | 1.1 | 1.1 | 1.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:OtherServices wu:NorthAmericaMember | 100.0 | 100.0 | 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 | 84 | 83 | 90 | 84 | 68 | 76 | 84 | 82 | 82 | 84 | 92 | 92 | 94 | 96 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 6.9 | 7.2 | 7.3 | 6.9 | 6.5 | 6.8 | 6.5 | 6.7 | 6.4 | 6.6 | 6.6 | 7.0 | 7.0 | 7.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 6.9 | 7.2 | 7.3 | 6.9 | 6.5 | 6.8 | 6.5 | 6.7 | 6.4 | 6.6 | 6.6 | 7.0 | 7.0 | 7.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:EastAsiaAndOceania | 100.0 | 100.0 | 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 | 399 | 374 | 404 | 390 | 328 | 333 | 381 | 373 | 373 | 356 | 381 | 386 | 388 | 379 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 32.2 | 32.1 | 32.8 | 32.2 | 31.1 | 29.7 | 29.2 | 30.2 | 29.3 | 28.0 | 27.2 | 29.0 | 28.5 | 28.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 32.2 | 32.1 | 32.8 | 32.2 | 31.1 | 29.7 | 29.2 | 30.2 | 29.3 | 28.0 | 27.2 | 29.0 | 28.5 | 28.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:EuropeAndRussiaCis | 100.0 | 100.0 | 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 | 114 | 107 | 112 | 100 | 72 | 110 | 135 | 138 | 136 | 133 | 139 | 134 | 142 | 146 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 9.2 | 9.2 | 9.1 | 8.2 | 6.9 | 9.9 | 10.4 | 11.2 | 10.7 | 10.5 | 10.0 | 10.1 | 10.4 | 10.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 9.2 | 9.2 | 9.1 | 8.2 | 6.9 | 9.9 | 10.4 | 11.2 | 10.7 | 10.5 | 10.0 | 10.1 | 10.4 | 10.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:LatinAmericaAndCaribbean | 100.0 | 100.0 | 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 | 167 | 160 | 166 | 169 | 138 | 157 | 164 | 165 | 160 | 153 | 165 | 158 | 165 | 166 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 13.5 | 13.7 | 13.5 | 14.0 | 13.1 | 14.0 | 12.6 | 13.3 | 12.6 | 12.1 | 11.8 | 11.9 | 12.2 | 12.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 13.5 | 13.7 | 13.5 | 14.0 | 13.1 | 14.0 | 12.6 | 13.3 | 12.6 | 12.1 | 11.8 | 11.9 | 12.2 | 12.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:MiddleEastAfricaAndSouthAsia | 100.0 | 100.0 | 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 | 473 | 440 | 459 | 469 | 448 | 444 | 478 | 478 | 522 | 547 | 564 | 559 | 570 | 557 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 38.2 | 37.8 | 37.3 | 38.7 | 42.4 | 39.6 | 36.6 | 38.7 | 41.0 | 42.9 | 40.2 | 42.0 | 41.9 | 41.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 38.2 | 37.8 | 37.3 | 38.7 | 42.4 | 39.6 | 36.6 | 38.7 | 41.0 | 42.9 | 40.2 | 42.0 | 41.9 | 41.4 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:NorthAmericaMember | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 1289 | 1210 | 1271 | 1258 | 1114 | 1190 | 1307 | 1306 | 1340 | 1337 | 1401 | 1387 | 1411 | 1389 | 1438 | 1404 | 1378 | 1302 | 1371 | 1377 | 1375 | 1297 | 1380 | 1399 | 1383 | 1320 | 1409 | 1440 | 1405 | 1350 | 1421 | 1408 | 1385 | 1325 | 1424 | 1421 | 1425 | 1393 | 1431 | 1410 | 1366 | 1283 | 1357 | 1329 | 1273 | 1232 | 1314 | 1314 | 1254 | 1201 |
| Percentage of Revenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 104.1 | 103.7 | 103.2 | 103.6 | 105.6 | 106.0 | 100.0 | 105.6 | 105.1 | 104.8 | 100.0 | 104.2 | 103.7 | 103.2 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 63 | 62 | 61 | 62 | 58 | 76 | 85 | 93 | 132 | 184 | 177 | 180 | 190 | 201 |
| Percentage of Revenues | 4.9 | 5.2 | 4.8 | 5.0 | 5.3 | 6.4 | 6.6 | 7.1 | 9.8 | 13.8 | 12.6 | 13.0 | 13.5 | 14.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 5.1 | 5.4 | 5.0 | 5.2 | 5.6 | 6.8 | 6.6 | 7.5 | 10.4 | 14.5 | 12.6 | 13.5 | 14.0 | 15.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 99 | 96 | 89 | 89 | 79 | 98 | 97 | 100 | 95 | 95 | 96 | 100 | 93 | 96 | 94 | 99 | 96 | 93 | 98 | 97 | 100 | 99 | 101 | 101 | 97 | 98 | 101 | 105 | 98 |
| Percentage of Revenues | 7.7 | 8.0 | 7.0 | 7.1 | 7.1 | 8.3 | 7.4 | 7.7 | 7.1 | 7.2 | 6.9 | 7.2 | 6.6 | 7.0 | 6.6 | 7.1 | 7.0 | 7.2 | 7.2 | 7.1 | 7.3 | 7.6 | 7.4 | 7.2 | 7.1 | 7.4 | 7.2 | 7.3 | 7.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 8.0 | 8.3 | 7.2 | 7.3 | 7.5 | 8.8 | 7.4 | 8.1 | 7.5 | 7.5 | 6.9 | 7.5 | 6.8 | 7.2 | 6.6 | 7.1 | 7.0 | 7.2 | 7.2 | 7.1 | 7.3 | 7.6 | 7.4 | 7.2 | 7.1 | 7.4 | 7.2 | 7.3 | 7.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments wu:BusinessSolutions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 1127 | 1050 | 1121 | 1106 | 976 | 1015 | 1125 | 1113 | 1112 | 1056 |
| Percentage of Revenues | 87.4 | 86.9 | 88.2 | 87.9 | 87.6 | 85.3 | 86.0 | 85.2 | 83.0 | 79.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 91.0 | 90.1 | 91.0 | 91.1 | 92.5 | 90.5 | 86.0 | 89.9 | 87.3 | 82.9 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments wu:ConsumerToConsumer | 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 | 41 | 40 | 39 | 40 | 36 | 53 | 61 | 68 | 106 | 159 | 152 | 156 | 165 | 177 |
| Percentage of Revenues | 3.2 | 3.4 | 3.1 | 3.2 | 3.3 | 4.5 | 4.7 | 5.2 | 7.9 | 11.9 | 10.9 | 11.3 | 11.7 | 12.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 3.4 | 3.5 | 3.2 | 3.4 | 3.4 | 4.7 | 4.7 | 5.5 | 8.3 | 12.5 | 10.9 | 11.7 | 12.2 | 13.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerBillPayments | 108.9 | 107.9 | 108.7 | 107.6 | 107.7 | 111.1 | 113.5 | 115.6 | 111.9 | 106.3 | 106.1 | 105.0 | 104.1 | 104.8 |
| 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 |
| Value | 1127 | 1050 | 1121 | 1106 | 976 | 1015 | 1125 | 1113 | 1112 | 1056 | 1127 | 1107 | 1127 | 1091 |
| Percentage of Revenues | 87.4 | 86.9 | 88.2 | 87.9 | 87.6 | 85.3 | 86.0 | 85.2 | 83.0 | 79.1 | 80.5 | 79.8 | 79.9 | 78.5 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 91.0 | 90.1 | 91.0 | 91.1 | 92.5 | 90.5 | 86.0 | 89.9 | 87.3 | 82.9 | 80.5 | 83.1 | 82.8 | 81.1 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ConsumerMoneyTransfers | 101.6 | 101.2 | 101.2 | 101.5 | 103.0 | 103.0 | 102.3 | 102.8 | 102.3 | 102.2 | 101.9 | 102.1 | 101.6 | 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 |
| Value | 99 | 96 | 89 | 89 | 79 | 98 | 97 | 100 | 95 | 95 | 96 | 100 | 93 | 96 |
| Percentage of Revenues | 7.7 | 8.0 | 7.0 | 7.1 | 7.1 | 8.3 | 7.4 | 7.7 | 7.1 | 7.2 | 6.9 | 7.2 | 6.6 | 7.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 8.0 | 8.3 | 7.2 | 7.3 | 7.5 | 8.8 | 7.4 | 8.1 | 7.5 | 7.5 | 6.9 | 7.5 | 6.8 | 7.2 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:ForeignExchangeAndPaymentServices | 132.2 | 131.5 | 125.5 | 128.4 | 139.3 | 137.4 | 134.0 | 129.1 | 131.3 | 131.0 | 130.1 | 125.2 | 127.5 | 129.5 |
| 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 | 21 | 21 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 25 | 24 | 23 | 24 | 24 |
| Percentage of Revenues | 1.7 | 1.8 | 1.7 | 1.7 | 2.0 | 1.9 | 1.9 | 1.9 | 1.9 | 1.9 | 1.7 | 1.7 | 1.8 | 1.7 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 1.7 | 1.9 | 1.7 | 1.8 | 2.1 | 2.1 | 1.9 | 2.0 | 2.0 | 2.0 | 1.7 | 1.8 | 1.8 | 1.8 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax wu:OtherServices | 130.1 | 130.5 | 129.4 | 131.7 | 135.2 | 134.9 | 132.1 | 134.0 | 134.9 | 133.9 | 131.2 | 129.3 | 129.2 | 128.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 279 | 271 | 285 | 251 | 230 | 273 | 324 | 340 | 305 | 300 | 296 | 272 | 298 | 299 | 355 | 292 | 321 | 262 | 839 | 276 | 293 | 259 | 287 | 277 | 333 | 276 | 301 | 286 | 299 | 281 | 337 | 295 | 297 | 269 | 321 | 259 | 281 | 277 | 280 | 247 | 251 | 224 | 251 | 225 | 234 | 202 |
| Percentage of SellingGeneralAndAdministrativeExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 22.6 | 23.3 | 23.2 | 20.7 | 21.9 | 24.4 | 24.8 | 27.5 | 23.9 | 23.6 | 21.2 | 20.5 | 21.9 | 22.2 | 24.7 | 20.8 | 23.3 | 20.1 | 61.2 | 20.1 | 21.3 | 20.0 | 20.8 | 19.8 | 24.1 | 21.0 | 21.4 | 19.9 | 21.3 | 20.8 | 23.8 | 21.0 | 21.5 | 20.3 | 22.6 | 18.3 | 19.8 | 19.9 | 19.6 | 17.6 | 18.4 | 17.5 | 18.5 | 17.0 | 18.4 | 16.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 8978 | 9281 | 9496 | 8827 | 8707 | 8365 | 8758 | 8803 | 9043 | 9432 | 8996 | 8989 | 9115 | 9188 | 9231 | 9873 | 9408 | 9486 | 9419 | 9518 | 9394 | 9418 | 9458 | 9815 | 10063 | 10353 | 9890 | 9846 | 9874 | 9922 | 10121 | 9940 | 9589 | 9361 | 9465 | 9355 | 9166 | 9197 | 9069 | 8819 | 8009 | 7887 | 7929 | 7353 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 5813 | 6106 | 5821 |
| Percentage of Assets | 61.2 | 69.7 | 64.7 |
| Percentage of Assets | 61.2 | 69.7 | 64.7 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 8691 | 9062 | 9309 | 8760 | 8780 | 8515 | 8798 | 8823 | 9013 | 9806 | 9306 | 9404 | 9566 | 9563 | 9722 | 9164 | 8747 | 8735 | 8517 | 8131 | 8080 | 8179 | 8054 | 8468 | 8756 | 9003 | 8590 | 8666 | 8804 | 8854 | 9016 | 8890 | 8660 | 8444 | 8525 | 8208 | 8113 | 8230 | 8175 | 8317 | 7630 | 7607 | 7346 | 6999 |
| Percentage of Liabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 96.8 | 97.6 | 98.0 | 99.2 | 100.8 | 101.8 | 100.5 | 100.2 | 99.7 | 104.0 | 103.4 | 104.6 | 105.0 | 104.1 | 105.3 | 92.8 | 93.0 | 92.1 | 90.4 | 85.4 | 86.0 | 86.8 | 85.1 | 86.3 | 87.0 | 87.0 | 86.9 | 88.0 | 89.2 | 89.2 | 89.1 | 89.4 | 90.3 | 90.2 | 90.1 | 87.7 | 88.5 | 89.5 | 90.1 | 94.3 | 95.3 | 96.4 | 92.7 | 95.2 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 5627 | 6146 | 6131 |
| Percentage of Liabilities | 60.4 | 69.9 | 65.9 |
| Percentage of Assets | 59.3 | 70.2 | 68.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 96.8 | 100.6 | 105.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 8978 | 9281 | 9496 | 8827 | 8707 | 8365 | 8758 | 8803 | 9043 | 9432 | 8996 | 8989 | 9115 | 9188 | 9231 | 9873 | 9408 | 9486 | 9419 | 9518 | 9394 | 9418 | 9458 | 9815 | 10063 | 10353 | 9890 | 9846 | 9874 | 9922 | 10121 | 9940 | 9589 | 9361 | 9465 | 9355 | 9166 | 9197 | 9069 | 8819 | 8009 | 7887 | 7929 | 7353 |
| Percentage of LiabilitiesAndStockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 5813 | 6106 | 5821 |
| Percentage of LiabilitiesAndStockholdersEquity | 61.2 | 69.7 | 64.7 |
| Percentage of Assets | 61.2 | 69.7 | 64.7 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 1061 | 1502 | 1428 | 1251 | 1181 | 1072 | 1450 | 1390 | 1210 | 833 | 973 | 767 | 938 | 934 | 838 | 1034 | 1059 | 1323 | 877 | 1280 | 1162 | 1160 | 1315 | 1414 | 1630 | 1755 | 1783 | 1667 | 1604 | 1694 | 2073 | 1742 | 1395 | 1417 | 1776 | 1433 | 1403 | 1395 | 1370 | 2671 | 2089 | 2215 | 2157 | 1996 | 1746 | 1529 | 1685 | 1295 | 1793 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 11.8 | 16.2 | 15.0 | 14.2 | 13.6 | 12.8 | 16.6 | 15.8 | 13.4 | 8.8 | 10.8 | 8.5 | 10.3 | 10.2 | 9.1 | 10.5 | 11.3 | 14.0 | 9.3 | 13.5 | 12.4 | 12.3 | 13.9 | 14.4 | 16.2 | 17.0 | 18.0 | 16.9 | 16.3 | 17.1 | 20.5 | 17.5 | 14.6 | 15.1 | 18.8 | 15.3 | 15.3 | 15.2 | 15.1 | 30.3 | 26.1 | 28.1 | 27.2 | 0.0 | 0.0 | 0.0 | 22.9 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2018-12-31 |
| Value | 100 | 27 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 8.0 | 2.8 |
| Percentage of Assets | 1.1 | 0.3 |
| Percentage of Assets us-gaap:Cash us-gaap:MoneyMarketFunds | 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 | 11 | 15 | 13 | 16 | 22 | 24 | 24 | 30 | 9.2 | 14 | 23 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 1.0 | 1.0 | 0.9 | 1.3 | 1.9 | 2.3 | 1.7 | 2.2 | 0.8 | 1.8 | 2.5 |
| Percentage of Assets | 0.1 | 0.2 | 0.1 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.1 | 0.2 | 0.3 |
| Percentage of Assets wu:SettlementAssets us-gaap:MoneyMarketFunds | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 2.1 | 4.0 | 0.2 |
| Percentage of CashAndCashEquivalentsAtCarryingValue | 0.1 | 0.3 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.1 | 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 |
| Value | 1073 | 1516 | 1447 | 1263 | 1193 | 1088 | 1456 | 1398 | 1217 | 880 | 979 | 776 | 950 | 953 | 844 | 1034 | 1059 | 1323 | 877 | 1315 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 12.0 | 16.3 | 15.2 | 14.3 | 13.7 | 13.0 | 16.6 | 15.9 | 13.5 | 9.3 | 10.9 | 8.6 | 10.4 | 10.4 | 9.1 | 10.5 | 11.3 | 14.0 | 9.3 | 13.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 2.1 | 4.0 | 0.2 | 1.0 | 0.3 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | 0.1 | 0.3 | 0.0 | 0.1 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 810 | 803 | 972 | 849 | 820 | 770 | 684 | 638 | 580 | 627 | 580 | 539 |
| 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 |
| Percentage of Assets | 8.5 | 9.2 | 10.8 | 9.2 | 8.7 | 8.1 | 6.9 | 6.3 | 6.1 | 6.9 | 7.3 | 7.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 0.4 | 0.4 | 88 | 88 | 88 | 87 | 87 | 82 | 80 | 80 | 77 | 75 |
| Percentage of PropertyPlantAndEquipmentGross | 0.0 | 0.0 | 9.1 | 10.4 | 10.8 | 11.3 | 12.8 | 12.9 | 13.8 | 12.8 | 13.4 | 13.9 |
| Percentage of Assets | 0.0 | 0.0 | 1.0 | 1.0 | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | 0.9 | 1.0 | 1.0 |
| Percentage of Assets us-gaap:Building | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 2.3 | 3.0 | 0.2 | 10 | 5.0 | 13 | 2.2 | 9.6 | 0.1 | 1.8 | 2.0 | 1.0 |
| Percentage of PropertyPlantAndEquipmentGross | 0.3 | 0.4 | 0.0 | 1.2 | 0.6 | 1.7 | 0.3 | 1.5 | 0.0 | 0.3 | 0.3 | 0.2 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:ConstructionInProgress | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 608 | 591 | 656 | 604 | 585 | 529 | 464 | 416 | 384 | 434 | 401 | 368 |
| Percentage of PropertyPlantAndEquipmentGross | 75.1 | 73.6 | 67.5 | 71.1 | 71.4 | 68.8 | 67.8 | 65.2 | 66.2 | 69.3 | 69.2 | 68.3 |
| Percentage of Assets | 6.4 | 6.8 | 7.3 | 6.6 | 6.2 | 5.6 | 4.7 | 4.1 | 4.1 | 4.8 | 5.1 | 5.0 |
| Percentage of Assets us-gaap:Equipment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 45 | 49 | 51 | 42 | 40 | 39 | 32 | 33 | 33 | 33 | 30 | 28 |
| Percentage of PropertyPlantAndEquipmentGross | 5.6 | 6.1 | 5.3 | 4.9 | 4.9 | 5.1 | 4.7 | 5.2 | 5.8 | 5.3 | 5.2 | 5.2 |
| Percentage of Assets | 0.5 | 0.6 | 0.6 | 0.5 | 0.4 | 0.4 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.4 |
| Percentage of Assets us-gaap:FurnitureAndFixtures | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 153 | 159 | 158 | 87 | 84 | 83 | 81 | 80 | 65 | 61 | 51 | 50 |
| Percentage of PropertyPlantAndEquipmentGross | 18.9 | 19.8 | 16.3 | 10.3 | 10.3 | 10.8 | 11.8 | 12.6 | 11.3 | 9.7 | 8.9 | 9.3 |
| Percentage of Assets | 1.6 | 1.8 | 1.8 | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.7 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 672 | 665 | 659 | 656 | 643 | 639 | 616 | 648 | 698 | 668 | 702 | 685 | 669 | 653 | 635 | 654 | 632 | 617 | 600 | 587 | 568 | 553 | 538 | 525 | 509 | 495 | 478 | 466 | 460 | 438 | 428 | 420 | 407 | 402 | 384 | 372 | 391 | 445 | 429 | 416 | 412 | 398 | 383 | 335 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 7.5 | 7.2 | 6.9 | 7.4 | 7.4 | 7.6 | 7.0 | 7.4 | 7.7 | 7.1 | 7.8 | 7.6 | 7.3 | 7.1 | 6.9 | 6.6 | 6.7 | 6.5 | 6.4 | 6.2 | 6.1 | 5.9 | 5.7 | 5.4 | 5.1 | 4.8 | 4.8 | 4.7 | 4.7 | 4.4 | 4.2 | 4.2 | 4.2 | 4.3 | 4.1 | 4.0 | 4.3 | 4.8 | 4.7 | 4.7 | 5.2 | 5.0 | 4.8 | 4.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 37 | 24 | 33 |
| Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 5.6 | 4.0 | 4.8 |
| Percentage of Assets | 0.4 | 0.3 | 0.4 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.6 | 0.4 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 42 | 40 | 41 | 39 | 41 | 41 | 43 | 42 | 45 | 45 | 48 | 45 | 46 | 47 | 46 | 45 | 46 | 47 | 46 | 47 | 47 | 48 | 50 | 57 | 46 | 47 | 52 | 50 | 51 | 50 | 48 | 52 | 50 | 47 | 46 | 46 | 43 | 48 |
| Percentage of AmortizationOfIntangibleAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 141 | 144 | 150 | 156 | 167 | 173 | 186 | 212 | 224 | 229 | 270 | 266 | 241 | 215 | 214 | 211 | 215 | 209 | 220 | 224 | 221 | 226 | 231 | 224 | 201 | 202 | 206 | 205 | 208 | 214 | 209 | 208 | 203 | 198 | 196 | 196 | 196 | 196 | 198 | 193 | 196 | 194 | 196 | 204 | 192 |
| Percentage of PropertyPlantAndEquipmentNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 1.6 | 1.6 | 1.6 | 1.8 | 1.9 | 2.1 | 2.1 | 2.4 | 2.5 | 2.4 | 3.0 | 3.0 | 2.7 | 2.3 | 2.3 | 2.1 | 2.3 | 2.2 | 2.3 | 2.4 | 2.4 | 2.4 | 2.5 | 2.3 | 2.0 | 2.0 | 2.1 | 2.1 | 2.1 | 2.2 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.2 | 2.2 | 2.5 | 2.5 | 2.5 | 2.8 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 54 | 68 | 107 |
| Percentage of PropertyPlantAndEquipmentNet | 35.9 | 36.7 | 39.7 |
| Percentage of Assets | 0.6 | 0.8 | 1.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.9 | 1.1 | 1.8 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 150 | 236 | 270 | 214 |
| Percentage of PropertyPlantAndEquipmentNet | 100.0 | 126.4 | 100.0 | 100.0 |
| Percentage of Assets | 1.6 | 2.7 | 3.0 | 2.3 |
| Percentage of Assets us-gaap:OperatingSegments | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 |
| Value | 100 | 173 | 207 | 156 | 174 | 182 | 158 | 156 |
| Percentage of PropertyPlantAndEquipmentNet | 66.8 | 92.9 | 76.7 | 73.2 | 78.9 | 78.9 | 76.6 | 74.6 |
| Percentage of Assets | 1.1 | 2.0 | 2.3 | 1.7 | 1.8 | 1.9 | 1.6 | 1.5 |
| Percentage of Assets us-gaap:OperatingSegments country:US | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 50 | 62 | 63 | 57 | 46 |
| Percentage of PropertyPlantAndEquipmentNet | 33.2 | 33.4 | 23.3 | 26.8 | 21.1 |
| Percentage of Assets | 0.5 | 0.7 | 0.7 | 0.6 | 0.5 |
| Percentage of Assets us-gaap:OperatingSegments us-gaap:NonUs | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 5661 | 5886 | 5665 |
| Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 59.6 | 67.2 | 63.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 97.4 | 96.4 | 97.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 2566 | 2566 | 2566 | 2566 | 2566 | 2566 | 2566 | 2566 | 2566 | 2568 | 2725 | 2725 | 2725 | 2726 | 2727 | 3161 | 3161 | 3162 | 3162 | 3162 | 3162 | 3162 | 3163 | 3168 | 3168 | 3168 | 3169 | 3169 | 3170 | 3170 | 3172 | 3174 | 3176 | 3178 | 3179 | 3185 | 3174 | 3166 | 3198 | 2325 | 2329 | 2159 | 2151 | 2143 | 1674 |
| Percentage of Goodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 28.6 | 27.7 | 27.0 | 29.1 | 29.5 | 30.7 | 29.3 | 29.2 | 28.4 | 27.2 | 30.3 | 30.3 | 29.9 | 29.7 | 29.6 | 32.0 | 33.6 | 33.3 | 33.6 | 33.2 | 33.7 | 33.6 | 33.4 | 32.3 | 31.5 | 30.6 | 32.0 | 32.2 | 32.1 | 32.0 | 31.3 | 31.9 | 33.1 | 34.0 | 33.6 | 34.1 | 34.6 | 34.4 | 35.3 | 26.4 | 29.1 | 27.4 | 27.1 | 29.1 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 53 | 53 | 212 | 214 | 215 |
| Percentage of Goodwill | 2.1 | 2.1 | 7.8 | 7.9 | 6.8 |
| Percentage of Assets | 0.6 | 0.6 | 2.4 | 2.3 | 2.3 |
| Percentage of Assets us-gaap:AllOtherSegments | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 532 | 532 | 532 | 532 | 996 | 996 | 996 | 996 | 1013 | 289 |
| Percentage of Goodwill | 20.7 | 20.7 | 19.5 | 19.5 | 31.5 | 31.4 | 31.4 | 31.3 | 31.7 | 13.4 |
| Percentage of Assets | 5.6 | 6.1 | 5.9 | 5.8 | 10.6 | 10.1 | 9.8 | 10.5 | 11.2 | 3.6 |
| Percentage of Assets wu:BusinessSolutions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 41.0 | 44.1 | 49.5 | 53.2 | 40.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 1980 | 1980 | 1980 | 1981 | 1947 | 1945 | 1619 | 1619 | 1427 |
| Percentage of Goodwill | 77.2 | 77.2 | 72.7 | 72.6 | 61.3 | 60.8 | 75.3 | 75.6 | 85.2 |
| Percentage of Assets | 20.9 | 22.6 | 22.0 | 21.5 | 20.6 | 21.4 | 20.4 | 22.0 | 0.0 |
| Percentage of Assets wu:ConsumerToConsumer | 0.0 | 0.0 | 0.0 | 0.0 | 40.1 | 41.9 | 32.3 | 35.2 | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 499 | 523 | 505 | 449 | 473 | 485 | 494 | 514 | 535 | 562 | 598 | 604 | 546 | 569 | 586 | 601 | 615 | 649 | 664 | 693 | 701 | 697 | 705 | 738 | 768 | 772 | 748 | 768 | 799 | 833 | 833 | 869 | 897 | 863 | 878 | 848 | 861 | 878 | 847 | 488 | 483 | 421 | 438 | 489 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 5.6 | 5.6 | 5.3 | 5.1 | 5.4 | 5.8 | 5.7 | 5.8 | 5.9 | 6.0 | 6.6 | 6.7 | 6.0 | 6.2 | 6.4 | 6.1 | 6.5 | 6.8 | 7.1 | 7.3 | 7.5 | 7.4 | 7.5 | 7.5 | 7.6 | 7.5 | 7.6 | 7.8 | 8.1 | 8.4 | 8.2 | 8.7 | 9.4 | 9.2 | 9.3 | 9.1 | 9.4 | 9.5 | 9.3 | 5.5 | 6.0 | 5.3 | 5.5 | 6.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 308 | 271 | 318 | 268 | 294 | 290 | 276 | 315 | 303 | 213 | 164 | 189 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 61.0 | 54.9 | 53.3 | 45.7 | 44.3 | 41.2 | 37.0 | 37.8 | 34.6 | 25.2 | 37.6 | 38.8 |
| Percentage of Assets | 3.2 | 3.1 | 3.5 | 2.9 | 3.1 | 3.1 | 2.8 | 3.1 | 3.2 | 2.4 | 2.1 | 2.6 |
| Percentage of Assets us-gaap:ContractualRights | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 75 | 124 | 171 | 220 | 264 | 316 | 374 | 414 | 466 | 526 | 186 | 205 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 15.0 | 25.1 | 28.6 | 37.5 | 39.8 | 44.9 | 50.1 | 49.7 | 53.0 | 62.1 | 42.6 | 42.0 |
| Percentage of Assets | 0.8 | 1.4 | 1.9 | 2.4 | 2.8 | 3.3 | 3.8 | 4.1 | 4.9 | 5.8 | 2.4 | 2.8 |
| Percentage of Assets us-gaap:CustomerContracts | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 55 | 54 | 80 | 53 | 56 | 53 | 60 | 65 | 54 | 61 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 11.0 | 11.1 | 13.5 | 9.1 | 8.5 | 7.6 | 8.0 | 7.8 | 6.2 | 7.2 |
| Percentage of Assets | 0.6 | 0.6 | 0.9 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.7 |
| Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 12 | 13 | 15 | 16 | 18 | 20 | 22 | 25 | 28 | 31 | 33 | 35 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 2.4 | 2.7 | 2.6 | 2.9 | 2.8 | 2.9 | 3.0 | 3.0 | 3.2 | 3.7 | 7.6 | 7.3 |
| Percentage of Assets | 0.1 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.4 | 0.5 |
| Percentage of Assets us-gaap:Trademarks | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 53 | 31 | 12 | 28 | 30 | 23 | 12 | 9.6 | 15 | 0.8 | 6.1 | 6.0 |
| Percentage of IntangibleAssetsNetExcludingGoodwill | 10.6 | 6.3 | 2.0 | 4.8 | 4.6 | 3.3 | 1.6 | 1.2 | 1.8 | 0.1 | 1.4 | 1.2 |
| Percentage of Assets | 0.6 | 0.4 | 0.1 | 0.3 | 0.3 | 0.2 | 0.1 | 0.1 | 0.2 | 0.0 | 0.1 | 0.1 |
| Percentage of Assets wu:ProjectsInProcess | 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 | 189 | 192 | 195 | 190 | 199 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.0 | 2.2 | 2.2 | 2.3 | 2.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 63 | 66 |
| Percentage of OperatingLeaseRightOfUseAsset | 33.4 | 33.3 |
| Percentage of Assets | 0.7 | 0.8 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.1 | 1.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1072 | 905 | 1024 | 814 | 795 | 932 | 762 | 822 | 778 | 767 | 616 | 606 | 652 | 715 | 675 | 917 | 709 | 689 | 746 | 768 | 789 | 846 | 733 | 900 | 805 | 982 | 669 | 569 | 488 | 494 | 562 | 537 | 453 | 384 | 319 | 364 | 426 | 375 | 363 | 384 | 325 | 363 | 350 | 442 |
| Percentage of OtherAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 11.9 | 9.8 | 10.8 | 9.2 | 9.1 | 11.1 | 8.7 | 9.3 | 8.6 | 8.1 | 6.8 | 6.8 | 7.2 | 7.8 | 7.3 | 9.3 | 7.5 | 7.3 | 7.9 | 8.1 | 8.4 | 9.0 | 7.8 | 9.2 | 8.0 | 9.5 | 6.8 | 5.8 | 4.9 | 5.0 | 5.6 | 5.4 | 4.7 | 4.1 | 3.4 | 3.9 | 4.7 | 4.1 | 4.0 | 4.4 | 4.1 | 4.6 | 4.4 | 6.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 96 | 147 | 48 |
| Percentage of OtherAssets | 9.4 | 19.3 | 7.9 |
| Percentage of Assets | 1.0 | 1.7 | 0.5 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.7 | 2.4 | 0.8 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 2750 | 3250 |
| Percentage of LongTermDebt | 100.0 | 100.0 |
| Percentage of Assets | 30.6 | 35.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 2996 | 3230 | 3067 | 3036 | 3085 | 3070 | 3229 | 3248 | 3080 | 3370 | 3433 | 3295 | 3331 | 3143 | 3033 | 3533 | 3627 | 3490 | 2786 | 3224 | 3228 | 3225 | 3225 | 3483 | 3725 | 3728 | 3720 | 3714 | 3754 | 3844 | 4213 | 3968 | 3717 | 3726 | 4029 | 3433 | 3673 | 3633 | 3583 | 3982 | 3585 | 3583 | 3289 | 3048 |
| Percentage of DebtAndCapitalLeaseObligations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 33.4 | 34.8 | 32.3 | 34.4 | 35.4 | 36.7 | 36.9 | 36.9 | 34.1 | 35.7 | 38.2 | 36.7 | 36.6 | 34.2 | 32.9 | 35.8 | 38.6 | 36.8 | 29.6 | 33.9 | 34.4 | 34.2 | 34.1 | 35.5 | 37.0 | 36.0 | 37.6 | 37.7 | 38.0 | 38.7 | 41.6 | 39.9 | 38.8 | 39.8 | 42.6 | 36.7 | 40.1 | 39.5 | 39.5 | 45.2 | 44.8 | 45.4 | 41.5 | 41.5 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 3067 | 3229 | 3433 |
| Percentage of DebtAndCapitalLeaseObligations | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 32.3 | 36.9 | 38.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 52.8 | 52.9 | 59.0 |
| 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 | 187 | 187 | 188 | 171 | 167 | 150 | 152 | 161 | 166 | 165 | 161 | 156 | 166 | 173 | 173 | 140 | 135 | 135 | 85 | 272 | 268 | 276 | 272 | 314 | 310 | 305 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.1 | 2.0 | 2.0 | 1.9 | 1.9 | 1.8 | 1.7 | 1.8 | 1.8 | 1.8 | 1.8 | 1.7 | 1.8 | 1.9 | 1.9 | 1.4 | 1.4 | 1.4 | 0.9 | 2.9 | 2.9 | 2.9 | 2.9 | 3.2 | 3.1 | 3.1 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 44 | 45 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 | 100.0 |
| Percentage of Assets | 0.5 | 0.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 14 | 13 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 33.3 | 29.2 |
| Percentage of Assets | 0.2 | 0.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.3 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 37 | 38 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.4 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 14 | 13 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 38.1 | 35.1 |
| Percentage of Assets | 0.1 | 0.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.2 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 13 | 13 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 | 100.0 |
| Percentage of Assets | 0.1 | 0.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.2 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 27 | 30 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 | 100.0 |
| Percentage of Assets | 0.3 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 12 | 14 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 45.8 | 46.6 |
| Percentage of Assets | 0.1 | 0.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.2 | 0.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 90 | 102 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 | 100.0 |
| Percentage of Assets | 1.0 | 1.2 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 61 | 74 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 67.6 | 72.7 |
| Percentage of Assets | 0.6 | 0.9 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.0 | 1.2 |
| 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 | 234 | 236 | 234 | 229 | 242 | 249 | 259 | 261 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.5 | 2.7 | 2.7 | 2.7 | 2.8 | 2.8 | 2.9 | 2.8 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 100 | 105 |
| Percentage of OperatingLeaseLiability | 42.6 | 43.6 |
| Percentage of Assets | 1.1 | 1.2 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 1.7 | 1.7 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 |
| Value | 284 | 288 | 302 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.0 | 3.3 | 3.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 130 | 142 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 45.8 | 47.0 |
| Percentage of Assets | 1.4 | 1.6 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 2.2 | 2.3 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 |
| Value | 49 | 52 | 60 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.5 | 0.6 | 0.7 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 30 | 36 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 61.3 | 60.5 |
| Percentage of Assets | 0.3 | 0.4 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.5 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 286 | 218 | 186 | 67 | -73.4 | -149.7 | -39.5 | -19.7 | 30 | -374.2 | -309.8 | -415.3 | -451.3 | -375.8 | -491.4 | 709 | 661 | 750 | 902 | 1387 | 1314 | 1239 | 1404 | 1347 | 1307 | 1349 | 1300 | 1179 | 1070 | 1067 | 1104 | 1050 | 928 | 917 | 940 | 1146 | 1052 | 967 | 894 | 501 | 379 | 280 | 582 | 353 | -8.1 | 50 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.2 | 2.4 | 2.0 | 0.8 | -0.8 | -1.8 | -0.5 | -0.2 | 0.3 | -4.0 | -3.4 | -4.6 | -5.0 | -4.1 | -5.3 | 7.2 | 7.0 | 7.9 | 9.6 | 14.6 | 14.0 | 13.2 | 14.9 | 13.7 | 13.0 | 13.0 | 13.1 | 12.0 | 10.8 | 10.8 | 10.9 | 10.6 | 9.7 | 9.8 | 9.9 | 12.3 | 11.5 | 10.5 | 9.9 | 5.7 | 4.7 | 3.6 | 7.3 | 4.8 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 186 | -39.5 | -309.8 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.0 | -0.5 | -3.4 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 3.2 | -0.6 | -5.3 |
| 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 | 2016-12-31 |
| Value | -81.3 | -83.6 | -86.1 | -122.2 | -124.5 | -126.6 | -128.9 | -129.4 | -131.7 | -133.6 | -136.1 | -131.1 | -133.5 | -135.8 | -113.1 | -122.1 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -28.4 | -38.2 | -46.1 | -182.1 | 169.6 | 84.6 | 326.3 | 656.9 | -436.1 | 35.7 | 43.9 | 31.6 | 29.6 | 36.1 | 23.0 | -13.5 |
| Percentage of Assets | -0.9 | -0.9 | -0.9 | -1.4 | -1.4 | -1.5 | -1.5 | -1.5 | -1.5 | -1.4 | -1.5 | -1.5 | -1.5 | -1.5 | -1.2 | -1.3 |
| Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | -4.3 | -1.6 | -30.5 | -20.2 | -2.0 | 17 | -3.6 | 19 | 5.4 | 11 | 7.4 | -4.9 | -8.6 | -46.0 | -40.6 | 33 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -1.5 | -0.7 | -16.3 | -30.1 | 2.7 | -11.4 | 9.1 | -101.0 | 17.9 | -3.0 | -2.4 | 1.2 | 1.9 | 12.2 | 8.3 | 3.7 |
| Percentage of Assets | -0.0 | -0.0 | -0.3 | -0.2 | -0.0 | 0.2 | -0.0 | 0.2 | 0.1 | 0.1 | 0.1 | -0.1 | -0.1 | -0.5 | -0.4 | 0.4 |
| Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 47 | 45 | 58 | 57 | 49 | 30 | 24 | 27 | 21 | 11 | -1.1 | -9.4 | -4.7 | -5.5 | 2.7 | -3.8 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 16.6 | 20.7 | 31.2 | 84.9 | -68.0 | -20.3 | -62.5 | -140.1 | 72.2 | -3.2 | 0.4 | 2.3 | 1.0 | 1.5 | -0.5 | -0.4 |
| Percentage of Assets | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.4 | 0.3 | 0.3 | 0.2 | 0.1 | -0.0 | -0.1 | -0.1 | -0.1 | 0.0 | -0.0 |
| Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | -139.3 | -141.1 | -159.5 | -186.6 | -177.8 | -180.3 | -209.0 | -183.1 | -205.7 | -211.6 | -231.0 | -246.6 | -248.0 | -276.0 | -227.9 | -162.8 | -143.9 | -118.9 | -169.0 | -152.6 | -118.5 | -132.8 | -127.3 | -30.0 | -68.8 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -48.7 | -64.5 | -85.5 | -278.1 | 242.2 | 120.4 | 529.1 | 929.4 | -681.1 | 56.5 | 74.6 | 59.4 | 55.0 | 73.4 | 46.4 | -18.0 | -10.2 | -9.1 | -15.3 | -16.2 | -13.2 | -22.8 | -36.0 | 370.4 | -135.7 |
| Percentage of Assets | -1.6 | -1.5 | -1.7 | -2.1 | -2.0 | -2.2 | -2.4 | -2.1 | -2.3 | -2.2 | -2.6 | -2.7 | -2.7 | -3.0 | -2.5 | -1.7 | -1.5 | -1.2 | -1.7 | -1.6 | -1.3 | -1.7 | -1.7 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 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 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -101.2 | -88.7 | -76.9 | -70.7 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -35.3 | -46.3 | -54.2 | -150.8 | 137.9 | 67.6 | 256.2 | 513.7 | -335.1 | 27.0 | 32.7 | 24.4 | 22.4 | 23.6 | 15.6 | -7.8 |
| Percentage of Assets | -1.1 | -1.1 | -1.1 | -1.1 | -1.2 | -1.2 | -1.2 | -1.1 | -1.1 | -1.1 | -1.1 | -1.1 | -1.1 | -1.0 | -0.8 | -0.8 |
| Percentage of Assets us-gaap:AccumulatedTranslationAdjustment | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 919 | 904 | 885 | 874 | 860 | 854 | 841 | 818 | 801 | 771 | 755 | 743 | 732 | 715 | 697 | 640 | 566 | 445 | 390 | 332 | 247 | 117 | 40 | -14.4 | -341.1 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 321.2 | 413.2 | 474.3 | 1303.9 | -1172.3 | -570.9 | -2129.6 | -4155.3 | 2653.3 | -206.1 | -243.9 | -179.1 | -162.2 | -190.4 | -142.0 | 71.0 | 40.3 | 34.3 | 35.4 | 35.4 | 27.6 | 20.1 | 11.5 | 177.8 | -672.8 |
| Percentage of Assets | 10.2 | 9.7 | 9.3 | 9.9 | 9.9 | 10.2 | 9.6 | 9.3 | 8.9 | 8.2 | 8.4 | 8.3 | 8.0 | 7.8 | 7.6 | 6.8 | 6.0 | 4.5 | 3.9 | 3.5 | 2.7 | 1.5 | 0.6 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 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 | -139.3 | -141.1 | -159.5 | -186.6 | -177.8 | -180.3 | -209.0 | -183.1 | -205.7 | -211.6 | -231.0 | -246.6 | -248.0 | -276.0 | -227.9 | -162.8 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -48.7 | -64.5 | -85.5 | -278.1 | 242.2 | 120.4 | 529.1 | 929.4 | -681.1 | 56.5 | 74.6 | 59.4 | 55.0 | 73.4 | 46.4 | -18.0 |
| Percentage of Assets | -1.6 | -1.5 | -1.7 | -2.1 | -2.0 | -2.2 | -2.4 | -2.1 | -2.3 | -2.2 | -2.6 | -2.7 | -2.7 | -3.0 | -2.5 | -1.7 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.3 | 4.3 | 4.4 | 4.4 | 4.5 | 4.6 | 4.6 | 4.8 | 5.0 | 5.2 | 5.5 | 5.7 | 6.2 | 6.5 | 6.9 | 7.1 | 7.5 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | 1.4 | 1.9 | 2.2 | 6.1 | -5.6 | -2.7 | -10.6 | -21.3 | 14.2 | -1.1 | -1.4 | -1.1 | -1.0 | -1.2 | -0.9 | 0.5 | 0.4 | 0.4 | 0.5 | 0.6 | 0.7 | 1.1 | 2.0 | -87.7 | 14.8 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 |
| Percentage of Assets 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | -498.0 | -548.2 | -543.1 | -625.3 | -760.2 | -828.2 | -675.9 | -659.4 | -569.7 | -938.0 | -838.8 | -916.8 | -939.9 | -820.9 | -965.9 | 419 | 977 | 968 | 877 | 754 | 760 | 591 | 433 | 29 | 453 |
| Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest | -173.9 | -250.5 | -291.1 | -931.9 | 1035.7 | 553.2 | 1711.1 | 3347.2 | -1886.4 | 250.7 | 270.8 | 220.8 | 208.3 | 218.4 | 196.6 | 46.5 | 69.6 | 74.5 | 79.4 | 80.2 | 84.9 | 101.5 | 122.5 | -360.5 | 893.7 |
| Percentage of Assets | -5.5 | -5.9 | -5.7 | -7.1 | -8.7 | -9.9 | -7.7 | -7.5 | -6.3 | -9.9 | -9.3 | -10.2 | -10.3 | -8.9 | -10.5 | 4.5 | 10.3 | 9.8 | 8.7 | 8.0 | 8.4 | 7.5 | 5.9 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4100000.0 | 4200000.0 | 4200000.0 | 4300000.0 | 4300000.0 | 4400000.0 | 4400000.0 | 4500000.0 | 4600000.0 | 4600000.0 | 4600000.0 | 4600000.0 | 4700000.0 | 4800000.0 | 4900000.0 | 4900000.0 | 4900000.0 | 5000000.0 | 5100000.0 | 5100000.0 | 5200000.0 | 5200000.0 | 5200000.0 | 5300000.0 | 5400000.0 | 5500000.0 | 5500000.0 | 5500000.0 | 5600000.0 | 5700000.0 | 6000000.0 | 6000000.0 | 6100000.0 | 6200000.0 | 6200000.0 | 6300000.0 | 6300000.0 | 6500000.0 | 6900000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.1 | 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 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 4100000.0 | 4200000.0 | 4400000.0 |
| Percentage of CommonStockValue | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 0.1 | 0.1 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 919 | 904 | 885 | 874 | 860 | 854 | 841 | 818 | 801 | 771 | 755 | 743 | 732 | 715 | 697 | 685 | 672 | 659 | 640 | 628 | 597 | 585 | 566 | 556 | 541 | 490 | 445 | 429 | 417 | 405 | 390 | 378 | 354 | 342 | 332 | 324 | 311 | 298 | 247 | 233 | 221 | 197 | 117 | 40 |
| Percentage of AdditionalPaidInCapitalCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 10.2 | 9.7 | 9.3 | 9.9 | 9.9 | 10.2 | 9.6 | 9.3 | 8.9 | 8.2 | 8.4 | 8.3 | 8.0 | 7.8 | 7.6 | 6.9 | 7.1 | 7.0 | 6.8 | 6.6 | 6.4 | 6.2 | 6.0 | 5.7 | 5.4 | 4.7 | 4.5 | 4.4 | 4.2 | 4.1 | 3.9 | 3.8 | 3.7 | 3.7 | 3.5 | 3.5 | 3.4 | 3.2 | 2.7 | 2.6 | 2.8 | 2.5 | 1.5 | 0.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 885 | 841 | 755 |
| Percentage of AdditionalPaidInCapitalCommonStock | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 9.3 | 9.6 | 8.4 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | 15.2 | 13.8 | 13.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | -498.0 | -548.2 | -543.1 | -625.3 | -760.2 | -828.2 | -675.9 | -659.4 | -569.7 | -938.0 | -838.8 | -916.8 | -939.9 | -819.8 | -965.9 | 247 | 193 | 259 | 419 | 930 | 877 | 827 | 977 | 912 | 884 | 931 | 968 | 856 | 810 | 827 | 877 | 832 | 707 | 702 | 754 | 940 | 842 | 794 | 760 | 357 | 307 | 230 | 591 | 433 |
| Percentage of RetainedEarningsAccumulatedDeficit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -5.5 | -5.9 | -5.7 | -7.1 | -8.7 | -9.9 | -7.7 | -7.5 | -6.3 | -9.9 | -9.3 | -10.2 | -10.3 | -8.9 | -10.5 | 2.5 | 2.1 | 2.7 | 4.5 | 9.8 | 9.3 | 8.8 | 10.3 | 9.3 | 8.8 | 9.0 | 9.8 | 8.7 | 8.2 | 8.3 | 8.7 | 8.4 | 7.4 | 7.5 | 8.0 | 10.1 | 9.2 | 8.6 | 8.4 | 4.1 | 3.8 | 2.9 | 7.5 | 5.9 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | -543.1 | -675.9 | -838.8 |
| Percentage of RetainedEarningsAccumulatedDeficit | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -5.7 | -7.7 | -9.3 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | -9.3 | -11.1 | -14.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 | 2007-12-31 |
| Value | -139300000.0 | -141100000.0 | -159500000.0 | -186600000.0 | -177800000.0 | -180300000.0 | -209000000.0 | -183100000.0 | -205700000.0 | -211600000.0 | -231000000.0 | -246600000.0 | -248000000.0 | -276000000.0 | -227900000.0 | -228300000.0 | -209400000.0 | -173800000.0 | -162800000.0 | -176900000.0 | -165000000.0 | -179100000.0 | -143900000.0 | -126300000.0 | -123500000.0 | -78100000.0 | -118900000.0 | -110900000.0 | -162500000.0 | -170000000.0 | -169000000.0 | -165300000.0 | -138300000.0 | -133700000.0 | -152600000.0 | -124500000.0 | -107000000.0 | -132500000.0 | -118500000.0 | -94700000.0 | -156500000.0 | -153400000.0 | -132800000.0 | -127300000.0 | -30000000.0 | -68800000.0 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -1.6 | -1.5 | -1.7 | -2.1 | -2.0 | -2.2 | -2.4 | -2.1 | -2.3 | -2.2 | -2.6 | -2.7 | -2.7 | -3.0 | -2.5 | -2.3 | -2.2 | -1.8 | -1.7 | -1.9 | -1.8 | -1.9 | -1.5 | -1.3 | -1.2 | -0.8 | -1.2 | -1.1 | -1.6 | -1.7 | -1.7 | -1.7 | -1.4 | -1.4 | -1.6 | -1.3 | -1.2 | -1.4 | -1.3 | -1.1 | -2.0 | -1.9 | -1.7 | -1.7 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | -159500000.0 | -209000000.0 | -231000000.0 |
| Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | -1.7 | -2.4 | -2.6 |
| Percentage of Assets srt:ParentCompany srt:ReportableLegalEntities | -2.7 | -3.4 | -4.0 |
| 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 | 12 | 10 | 14 | 5.3 | 12 | 9.7 | 11 | 13 | 11 | 11 | 13 |
| 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 |
| 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 |
| 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 | 12 | 10 | 14 | 5.3 | 12 | 9.7 | 11 | 13 | 11 | 11 | 13 |
| 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 |
| 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 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 173 | 175 | 291 | 237 | 235 | 112 | 249 | 262 | 163 | 239 | 302 | 219 | 166 | 132 | 312 | 447 | -110.3 | 86 | 220 | 336 | 272 | 212 | 266 | 338 | 253 | 211 | 270 | 325 | 253 | 196 | 277 | 333 | 240 | 237 | 325 | 413 | 230 | 215 | 292 | 376 | 254 | 251 | 284 | 383 | 251 | 74 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 14.0 | 15.1 | 23.7 | 19.6 | 22.3 | 10.0 | 19.1 | 21.2 | 12.8 | 18.8 | 21.6 | 16.5 | 12.2 | 9.9 | 21.7 | 31.8 | -8.0 | 6.6 | 16.0 | 24.4 | 19.8 | 16.4 | 19.3 | 24.2 | 18.4 | 16.0 | 19.2 | 22.6 | 18.0 | 14.6 | 19.5 | 23.7 | 17.3 | 17.9 | 22.9 | 29.1 | 16.2 | 15.4 | 20.4 | 26.7 | 18.6 | 19.6 | 21.0 | 28.9 | 19.8 | 6.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -201.1 | -96.2 | -44.7 | -24.5 | -53.0 | 8.8 | -24.7 | -30.0 | 703 | -16.7 | -99.0 | -161.1 | -35.8 | -32.9 | 81 | -194.8 | -40.7 | -50.6 | -37.2 | -76.8 | -93.8 | -63.3 | 31 | -95.5 | -178.0 | -44.4 | -49.7 | -33.0 | -51.1 | 44 | -75.1 | -159.5 | -68.8 | -37.9 | -94.4 | -37.7 | -50.3 | -75.8 | -1099.1 | -50.1 | -189.2 | -21.9 | 8.6 | -46.5 | -28.9 | 2.2 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -16.2 | -8.2 | -3.6 | -2.0 | -5.0 | 0.8 | -1.9 | -2.4 | 55.2 | -1.3 | -7.1 | -12.1 | -2.6 | -2.4 | 5.7 | -13.9 | -3.0 | -3.9 | -2.7 | -5.6 | -6.8 | -4.9 | 2.3 | -6.8 | -12.9 | -3.4 | -3.5 | -2.3 | -3.6 | 3.3 | -5.3 | -11.3 | -5.0 | -2.9 | -6.6 | -2.7 | -3.5 | -5.4 | -76.8 | -3.6 | -13.8 | -1.7 | 0.6 | -3.5 | -2.3 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -415.6 | -10.4 | -63.7 | -143.0 | -77.6 | -489.2 | -166.0 | -52.0 | -529.5 | -322.3 | -0.8 | -232.0 | -133.9 | 9.5 | -590.7 | -276.8 | -113.1 | 410 | -586.0 | -141.4 | -176.5 | -305.3 | -396.9 | -459.1 | -200.7 | -195.3 | -105.1 | -229.5 | -291.5 | -620.3 | 127 | 173 | -193.1 | -558.8 | 112 | -347.0 | -172.5 | -114.2 | -493.2 | 255 | -191.6 | -171.3 | -132.4 | -87.4 | -5.8 | -232.0 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -33.5 | -0.9 | -5.2 | -11.8 | -7.4 | -43.6 | -12.7 | -4.2 | -41.5 | -25.3 | -0.1 | -17.4 | -9.8 | 0.7 | -41.1 | -19.7 | -8.2 | 31.5 | -42.7 | -10.3 | -12.8 | -23.5 | -28.8 | -32.8 | -14.5 | -14.8 | -7.5 | -15.9 | -20.7 | -45.9 | 9.0 | 12.3 | -13.9 | -42.2 | 7.9 | -24.4 | -12.1 | -8.2 | -34.5 | 18.1 | -14.0 | -13.4 | -9.8 | -6.6 | -0.5 | -18.8 |
| 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 | -443.0 | 69 | 183 | 70 | 104 | -368.0 | 58 | 180 | 337 | -99.4 | 203 | -173.3 | -3.7 | 109 | -190.3 | -24.5 | -264.1 | 445 |
| 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 | -35.8 | 5.9 | 14.9 | 5.8 | 9.9 | -32.8 | 4.5 | 14.6 | 26.4 | -7.8 | 14.5 | -13.0 | -0.3 | 8.1 | -13.2 | -1.7 | -19.2 | 34.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 173 | 175 | 291 | 237 | 235 | 112 | 249 | 262 | 163 | 239 | 302 | 219 | 166 | 132 | 312 | 447 | -110.3 | 86 | 220 | 336 | 272 | 212 | 266 | 338 | 253 | 211 | 270 | 325 | 253 | 196 | 277 | 333 | 240 | 237 | 325 | 413 | 230 | 215 | 292 | 376 | 254 | 251 | 284 | 383 | 251 | 74 |
| Percentage of NetCashProvidedByUsedInOperatingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 14.0 | 15.1 | 23.7 | 19.6 | 22.3 | 10.0 | 19.1 | 21.2 | 12.8 | 18.8 | 21.6 | 16.5 | 12.2 | 9.9 | 21.7 | 31.8 | -8.0 | 6.6 | 16.0 | 24.4 | 19.8 | 16.4 | 19.3 | 24.2 | 18.4 | 16.0 | 19.2 | 22.6 | 18.0 | 14.6 | 19.5 | 23.7 | 17.3 | 17.9 | 22.9 | 29.1 | 16.2 | 15.4 | 20.4 | 26.7 | 18.6 | 19.6 | 21.0 | 28.9 | 19.8 | 6.0 |
| 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 | 222 | 181 | 177 | 228 | 161 | 176 | 135 | 135 | 614 | 173 | 212 | 208 | 217 | 213 | -1120.9 | 235 | 166 | 161 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 14.4 | 18.8 | 15.3 | 15.7 | 10.4 | 10.9 | 48.2 | 13.6 | 15.1 | 15.7 | 16.0 | 15.9 | -77.9 | 16.8 | 12.1 | 12.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2009-09-30 | 2009-06-30 | 2009-03-31 |
| Value | 222 | 181 | 177 | 228 | 161 | 176 | 135 | 135 | 614 | 173 | 212 | 208 | 217 | 213 | -1120.9 | 235 | 166 | 161 | -355.0 | 216 | 205 | 185 | 212 | 232 | 189 | 203 | 221 | 234 | 193 | 203 | 173 | 214 | 198 | 212 | 237 | 269 | 271 | 247 | 452 | 239 | 263 | 210 | 242 | 238 | 221 | 207 | 223 | 181 | 220 | 223 |
| Percentage of ProfitLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 14.4 | 18.8 | 15.3 | 15.7 | 10.4 | 10.9 | 48.2 | 13.6 | 15.1 | 15.7 | 16.0 | 15.9 | -77.9 | 16.8 | 12.1 | 12.4 | -25.9 | 15.7 | 14.9 | 14.3 | 15.4 | 16.6 | 13.7 | 15.4 | 15.7 | 16.2 | 13.8 | 15.0 | 12.2 | 15.2 | 14.3 | 16.0 | 16.7 | 19.0 | 19.0 | 17.7 | 31.6 | 17.0 | 19.3 | 16.4 | 17.9 | 17.9 | 17.4 | 16.9 | 17.0 | 13.8 | 17.6 | 18.6 |
| 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 222 | 181 | 228 | 161 | 176 | 135 | 614 | 173 | 208 | 217 | 213 |
| 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 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | 18.0 | 15.6 | 18.8 | 15.3 | 15.7 | 10.9 | 48.2 | 13.6 | 15.7 | 16.0 | 15.9 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -201.1 | -96.2 | -44.7 | -24.5 | -53.0 | 8.8 | -24.7 | -30.0 | 703 | -16.7 | -99.0 | -161.1 | -35.8 | -32.9 | 81 | -194.8 | -40.7 | -50.6 | -37.2 | -76.8 | -93.8 | -63.3 | 31 | -95.5 | -178.0 | -44.4 | -49.7 | -33.0 | -51.1 | 44 | -75.1 | -159.5 | -68.8 | -37.9 | -94.4 | -37.7 | -50.3 | -75.8 | -1099.1 | -50.1 | -189.2 | -21.9 | 8.6 | -46.5 | -28.9 | 2.2 |
| Percentage of NetCashProvidedByUsedInInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of RevenueFromContractWithCustomerExcludingAssessedTax | -16.2 | -8.2 | -3.6 | -2.0 | -5.0 | 0.8 | -1.9 | -2.4 | 55.2 | -1.3 | -7.1 | -12.1 | -2.6 | -2.4 | 5.7 | -13.9 | -3.0 | -3.9 | -2.7 | -5.6 | -6.8 | -4.9 | 2.3 | -6.8 | -12.9 | -3.4 | -3.5 | -2.3 | -3.6 | 3.3 | -5.3 | -11.3 | -5.0 | -2.9 | -6.6 | -2.7 | -3.5 | -5.4 | -76.8 | -3.6 | -13.8 | -1.7 | 0.6 | -3.5 | -2.3 | 0.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 9.2 | 8.7 | 12 | 8.6 | 9.6 | 6.3 | 9.2 | 7.5 | 15 | 16 | 35 | 42 | 38 | 20 | 20 | 16 | 24 | 7.9 | 17 | 24 | 12 | 14 | 28 | 38 | 12 | 14 | 16 | 16 | 16 | 18 | 19 | 24 | 18 | 17 | 16 | 16 | 13 | 14 | 13 | 12 | 14 | 12 | 16 | 16 | 13 | 7.1 |
| Percentage of PaymentsToAcquirePropertyPlantAndEquipment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -415.6 | -10.4 | -63.7 | -143.0 | -77.6 | -489.2 | -166.0 | -52.0 | -529.5 | -322.3 | -0.8 | -232.0 | -133.9 | 9.5 | -590.7 | -276.8 | -113.1 | 410 | -586.0 | -141.4 | -176.5 | -305.3 | -396.9 | -459.1 | -200.7 | -195.3 | -105.1 | -229.5 | -291.5 | -620.3 | 127 | 173 | -193.1 | -558.8 | 112 | -347.0 | -172.5 | -114.2 | -493.2 | 255 | -191.6 | -171.3 | -132.4 | -87.4 | -5.8 | -232.0 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -33.5 | -0.9 | -5.2 | -11.8 | -7.4 | -43.6 | -12.7 | -4.2 | -41.5 | -25.3 | -0.1 | -17.4 | -9.8 | 0.7 | -41.1 | -19.7 | -8.2 | 31.5 | -42.7 | -10.3 | -12.8 | -23.5 | -28.8 | -32.8 | -14.5 | -14.8 | -7.5 | -15.9 | -20.7 | -45.9 | 9.0 | 12.3 | -13.9 | -42.2 | 7.9 | -24.4 | -12.1 | -8.2 | -34.5 | 18.1 | -14.0 | -13.4 | -9.8 | -6.6 | -0.5 | -18.8 |
| Period End | 2021-06-30 | 2021-03-31 | 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | -0.9 | 892 | 387 | -0.3 | 297 | 0.0 | -0.2 | 350 | -0.7 | 396 | 575 | 0.0 | 0.0 | 0.0 | 0.0 | 248 | 742 |
| Percentage of ProceedsFromIssuanceOfLongTermDebt | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 |
| Value | 500 | 650 | 324 | 7.2 | 500 | 1005 | 250 | 250 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 500 | 0.0 | 0.0 | 0.0 | 300 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of RepaymentsOfLongTermDebt | 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 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-03-31 |
| Value | 650 |
| Percentage of RepaymentsOfLongTermDebt | 100.0 |
| Period End | 2021-06-30 |
| Value | 500 |
| Percentage of RepaymentsOfLongTermDebt | 100.0 |
| Period End | 2021-04-01 |
| Value | 514 |
| Percentage of RepaymentsOfLongTermDebt | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-10-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-10-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-10-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 96 | 96 | 92 | 92 | 92 | 92 | 83 | 84 | 85 | 87 | 83 | 84 | 85 | 87 | 80 | 80 | 81 | 83 | 77 | 77 | 78 | 79 | 78 | 78 | 79 | 80 | 65 | 65 | 66 | 67 | 68 | 69 | 69 | 70 | 72 | 59 | 59 | 60 | 61 | 99 | 49 | 49 | 50 | 44 | 45 | 39 | 39 | 39 | 40 |
| Percentage of PaymentsOfDividendsCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 76 | 84 | 1.7 | 0.3 | 0.6 | 237 | 68 | 142 | 170 | 171 | 51 | 108 | 241 | 11 | 13 | 102 | 167 | 219 | 81 | 85 | 100 | 233 | 69 | 128 | 166 | 147 | 45 | 132 | 132 | 185 | 59 | 24 | 126 | 190 | 349 | 114 | 155 | 146 | 0.0 | 145 | 160 | 498 | 70 | 94 | 217 | 200 |
| Percentage of PaymentsForRepurchaseOfCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-01 | 2019-12-01 | 2019-10-01 | 2018-06-01 | 2018-04-01 | 2018-03-01 |
| Value | 0.15 | 0.0161 | 0.0169 | 0.0234 | 0.0212 | 0.0196 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:ReportableLegalEntities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 0.26 | 0.0191 | 0.0287 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 0.0 | 0.0 | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.0 | 0.0 | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:ReportableLegalEntities wu:RevolverParentCo | 0.0 | 0.0 | 0.0 |
| Period End | 2021-01-01 |
| Value | 0.14 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 0.0 |
| Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:ReportableLegalEntities us-gaap:SubsequentEvent | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 14.5 | 10.4 | -0.6 | 12.4 | 0.162 | 0.125 | 0.02 | 0.168 | 0.175 | 0.199 | -0.013 | 0.217 | 0.148 | 0.089 | 2.489 | 0.015 | 0.097 | 0.241 | 0.153 | 0.096 | 0.076 | 0.146 | -0.003 | 0.125 | 0.085 | 0.123 | -0.018 | 0.142 | 0.165 | 0.107 | -0.01 | 0.148 | 0.145 | 0.153 | -0.025 | 0.168 | 0.125 | 0.148 | -0.141 | 0.236 | 0.211 | 0.235 | -0.016 | 0.227 | 0.188 | 0.247 |
| Percentage of EffectiveIncomeTaxRateContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 4.7 | 5.0 | 4.9 | 4.9 | 4.5 | 6.2 | 7.3 | 8.1 | 11 | 16 | 23 | 27 | 30 | 37 | 42 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 19.55 | 19.46 | 19.11 | 19.13 | 18.31 | 17.63 | 17.71 | 17.46 | 18.01 | 17.8 | 18.05 | 18.46 | 19.05 | 18.76 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | 100.0 | 100.0 | 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 |
| Value | 0 | 2700000.0 | 300000.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 0.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 173 | 138 | 152 | 161 | 317 | 305 | 296 | 309 | 307 | 319 | 345 | 350 | 354 | 352 | 502 | 414 | 417 |
| Percentage of DeferredTaxLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 82 | 101 | 75 | 79 | 332 | 158 | 128 | 115 | 129 |
| Percentage of DeferredTaxAssetsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 |
| Value | 340 | 338 | 340 | 294 | 292 | 290 | 293 | 296 | 298 | 295 | 295 | 323 | 323 | 323 | 329 | 333 | 354 | 353 | 352 | 92 | 107 | 108 | 105 | 108 | 104 | 99 | 93 | 106 | 117 | 114 | 117 | 111 | 108 | 104 | 103 | 106 | 103 | 120 | 123 | 716 | 680 | 618 | 477 |
| Percentage of UnrecognizedTaxBenefits | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 18 | 19 | 15 | 19 | 22 | 33 | 46 | 16 | 13 |
| Percentage of DeferredTaxAssetsValuationAllowance | 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 |
| Value | 800000.0 | 700000.0 | 1000000.0 |
| Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 3300000.0 | 3000000.0 | 1700000.0 |
| Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs | 412.5 | 428.6 | 170.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -19.0 | 42 | -2.8 | 4.3 |
| Percentage of CapitalExpendituresIncurredButNotYetPaid | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-02-11 | 2019-09-30 | 2019-02-07 | 2018-09-30 | 2018-02-13 | 2017-09-30 | 2017-03-31 | 2016-09-30 | 2015-07-16 |
| Value | 0.225 | 0.225 | 0.2 | 0.2 | 0.19 | 0.19 | 0.175 | 0.175 | 0.16 | 0.155 |
| Percentage of CommonStockDividendsPerShareDeclared | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-09 |
| Value | 15.0 |
| Percentage of DebtInstrumentBasisSpreadOnVariableRate1 | 100.0 |
| Period End | 2021-03-09 |
| Value | 25.0 |
| Percentage of DebtInstrumentBasisSpreadOnVariableRate1 | 166.7 |
| Period End | 2021-03-09 |
| Value | 101.0 |
| Percentage of DebtInstrumentRedemptionPricePercentage | 100.0 |
| Period End | 2021-03-09 |
| Value | 1.01 |
| Percentage of DebtInstrumentRedemptionPricePercentage | 1.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 13 | 12 | 15 | 14 | 15 | 16 | 23 | 18 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 19 | 19 | 18 | 19 | 18 | 18 | 17 | 18 | 17 | 16 | 16 | 17 | 16 | 16 | 16 | 16 | 15 | 16 | 15 | 15 | 14 | 16 | 15 | 15 | 14 | 15 | 15 | 15 | 15 | 15 | 14 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 3300000.0 |
| Percentage of DerivativeCashReceivedOnHedge | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 97 | 97 | 93 | 93 | 93 | 84 | 85 | 87 |
| Percentage of DividendsCommonStock | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 97 | 97 | 93 | 93 | 93 | 84 | 85 | 87 |
| Percentage of DividendsCommonStock | 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 | 2018-09-28 | 2018-09-30 | 2018-06-29 | 2018-06-30 | 2018-03-30 | 2018-03-31 | 2017-12-31 | 2017-09-29 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 95 | 96 | 92 | 92 | 92 | 92 | 83 | 84 | 85 | 87 | 83 | 84 | 84 | 85 | 85 | 87 | 87 | 80 | 80 | 80 | 81 | 83 | 77 | 77 | 78 | 79 | 78 | 78 | 79 | 80 | 65 | 65 | 66 | 67 | 68 | 69 | 69 | 70 | 72 | 59 | 60 | 61 | 49 | 49 | 50 | 44 | -284.8 | 39 | 39 | 40 |
| Percentage of DividendsCommonStockCash | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2021-04-12 |
| Value | 47 |
| Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal | 100.0 |
| Period End | 2021-04-12 |
| Value | 48 |
| Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal | 100.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 |
| Value | -100000.0 | -100000.0 | 600000.0 |
| Percentage of FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -600000.0 | -500000.0 | 300000.0 | -1200000.0 |
| Percentage of FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation | 600.0 | 500.0 | 50.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 600000.0 | 1900000.0 | 900000.0 | 300000.0 |
| Percentage of FinancingReceivableAllowanceForCreditLossesRecovery | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 0.4 | 0.4 | 0.7 | 1.0 |
| Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 34 | 3.3 | 3.0 | 1.7 |
| Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs | 8600.0 | 825.0 | 428.6 | 170.0 |
| 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 | 2013-12-31 | 2013-09-30 | 2013-06-30 |
| Value | -8.3 | -1.9 | -3.1 | 29 | -4.6 | 21 | 1.0 | 6.8 | 15 | 9.3 | 37 | -2.6 | 6.1 | -4.3 | -12.5 | -10.3 | 29 | 0.3 | 3.5 | -18.8 | 4.2 | 15 | -12.0 | 29 | 20 | 30 | -0.2 | -1.6 | -2.1 | -16.5 | 5.6 |
| Percentage of GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 1.9 | 16 | -8.3 | -1.9 | -3.1 | 29 | -3.9 | 20 | 1.0 | 6.6 | 14 | 8.9 | 35 | -0.1 | 5.8 | -4.0 | -12.1 | -10.2 | 27 | 0.2 | 3.1 | -17.6 | 4.7 | 15 | -11.2 |
| Percentage of GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 84.8 | 96.2 | 100.0 | 97.1 | 92.9 | 95.7 | 94.1 | 3.8 | 95.1 | 93.0 | 96.8 | 99.0 | 94.8 | 66.7 | 88.6 | 93.6 | 111.9 | 95.0 | 93.3 |
| Period End | 2021-03-31 |
| Value | 700000.0 |
| Percentage of GainOnDerivativeInstrumentsPretax | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 6.0 | -35.8 | 46 | -11.8 | -21.6 | -109.3 | 26 | 127 | -15.2 | -44.1 | -16.8 | 30 | -17.2 | -123.2 | 120 | 68 | -414.2 | -192.7 | 573 | 49 | -48.5 | -51.0 | -26.9 | 64 | 11 | -34.1 | 17 | 53 | -35.8 | -65.1 | 34 | 63 | 19 | -36.1 | 33 | 21 | -9.6 | -35.7 | -33.2 | 38 | -28.2 | -20.2 | -19.4 | 66 | -0.8 | -35.5 |
| Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -72.0 | 5.5 | 3.2 | -78.4 | -16.4 | -2.8 | 9.5 | -67.8 | -9.6 | 31 | -20.3 | -88.4 | -95.9 | 11 | 792 | 61 | 1.5 | -5.2 | 165 | 20 | -8.8 | 14 | 13 | 22 | -9.7 | 20 | -33.1 | 2.3 | -18.5 | 10.0 | 28 | -12.0 | -20.5 | 7.3 | -10.8 | 42 | -71.0 | -40.1 | -162.0 | 57 | 1.4 | 41 | -5.7 | 60 | -11.4 | -202.1 |
| Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 37 | 46 | 32 | -5.1 | -6.5 | 23 | 12 | -7.4 | -19.6 | 7.3 | -24.6 | 12 | -4.6 | 47 | 33 | 9.8 | 5.4 | 20 | 29 | 51 | -46.1 | 36 | -10.8 | 60 | 0.7 | 56 | 15 | -0.6 | 4.6 | 12 | 24 | 3.7 | 16 | 10 | -2.6 | 10 | 9.7 | 10 | 28 | -4.6 | -8.1 | 11 | 21 | 14 | -17.8 | -46.4 |
| Percentage of IncreaseDecreaseInOtherOperatingAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -2.7 | -12.5 | -11.0 | -2.4 | 4.8 | -8.1 | -7.2 | -11.4 | -3.2 | -6.4 | 6.9 | -6.0 | 0.8 | 2.5 | -40.1 | -0.1 | 47 | 0.5 | -61.1 | 14 | 7.0 | -1.5 | -2.9 | -2.3 | -6.9 | -2.5 | -5.1 | -7.9 | 12 | -1.0 | -2.1 | 0.1 | -6.0 | -7.7 | -3.4 | -6.2 | -8.8 | -11.9 | 0.0 | -28.0 | -17.8 | -5.4 | -4.6 | -14.2 | -20.0 | 1.5 |
| Percentage of IncreaseDecreaseInOtherOperatingLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 |
| Value | 0.3 | 0.4 | 0.3 | 0.5 | 0.8 | 1.6 | 2.1 | 1.1 | 1.0 | 2.1 | 1.2 | 1.6 | 1.3 | 0.7 | 1.1 | 1.3 | 1.4 | 1.1 | 0.8 | 1.1 | 0.7 | 0.9 | 2.5 | 3.0 | 2.5 | 2.9 | 2.1 | 1.8 | 2.9 | 4.7 | 3.7 | 4.6 | 0.7 | 0.4 | 1.4 | 1.4 | 1.2 |
| Percentage of InvestmentIncomeNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 20 | 13 | 12 | 13 | 13 | 13 | 14 | 15 |
| Percentage of OperatingLeaseExpense | 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 | 27 | 12 | 12 | 12 | 17 | 12 | 12 | 12 |
| Percentage of OperatingLeasePayments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 2.2 | -13.0 | 1.3000000000000038 | 7.1 | 19 | 5.7 | -2.9 | 5.8 | 9.9 | 13 | 8.3 | -4.7 | 0.8 | -8.7 | -3.6 | 0.5 | 5.2 | 4.4 | -16.2 | -2.1 | 3.5 | 3.2 | 1.0 | 3.7 | -6.8 | 1.0 | -0.5 | -1.4 | 3.9 | 2.8 | 0.1 | -0.2 | -2.6 | -0.9 |
| Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -6.2 | 24 | -22.1 | -15.1 | 27 | 20 | -3.9 | 4.4 | 3.3 | 31 | -12.3 |
| Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 2.3 | -16.0 | 8.5 | 24 | 7.2 | 7.2 | 13 | 16 | -6.2 | 1.1 | -11.7 |
| Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax | -37.1 | -66.1 | -38.5 | -162.9 | 26.4 | 34.6 | -333.3 | 381.8 | -187.9 | 3.5 | 95.1 |
| 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 | -3.9 | 8.2 | -13.6 | 9.5 | 34 | 28 | 9.1 | 21 | -2.9 | 32 | -24.0 |
| Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax | 62.9 | 33.9 | 61.5 | -62.9 | 126.4 | 134.6 | -233.3 | 481.8 | -87.9 | 103.5 | 195.1 |
| 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 |
| Value | -22.1 | -15.1 | 27 | -19.3 | 20 | -3.9 | 4.4 | 12 | 3.3 | 31 | -12.3 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax | 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 | -6.2 | 20 | -15.1 | 27 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 3.3 |
| Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 |
| Value | -2.3 | -2.5 | -36.1 | -2.3 | -2.1 | -2.3 | -0.5 | -2.3 | -1.9 | -2.5 | 5.0 | -2.4 | -2.3 | -2.1 | -3.4 | -2.0 | -1.8 | -1.8 | 0.1 | -1.7 | -1.7 | -1.7 | 4.6 | -1.6 | -1.3 | -1.8 | 13 | -1.8 | -1.6 | -1.6 | -5.0 | -1.9 | -2.0 | -2.5 | 12 | -1.6 | -1.7 | -1.6 | 16 | -1.2 | -1.1 |
| Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2020-09-30 | 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 | 0.9 | -0.2 | -0.1 | 0.3 | 0.3 | -0.1 | -0.9 | -0.2 | 0.5 | 0.5 |
| Percentage of OtherComprehensiveIncomeLossTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.2 | -2.9 | 1.4 | 4.8 | 1.1 | 1.4 | 2.7 | 3.8 | -1.5 | 0.2 | -2.6 |
| Percentage of OtherComprehensiveIncomeLossTax | 0.0 | -322.2 | -700.0 | -4800.0 | 366.7 | 466.7 | -2700.0 | -422.2 | 750.0 | 40.0 | -520.0 |
| 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 | 0.2 | -2.0 | 1.2 | 4.7 | 1.4 | 1.7 | 2.6 | 2.9 | -1.7 | 0.7 | -2.1 |
| Percentage of OtherComprehensiveIncomeLossTax | 0.0 | -222.2 | -600.0 | -4700.0 | 466.7 | 566.7 | -2600.0 | -322.2 | 850.0 | 140.0 | -420.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | -49.8 | -30.3 | -39.4 | -42.5 | -43.1 | -20.8 | -54.9 | -11.2 | -23.9 | -28.4 | -42.7 | -24.2 | 9.6 | -8.9 | 6.1 | -26.1 | -28.2 | -76.0 | -36.3 | -19.7 | -5.6 | -36.7 | -30.9 | -7.9 | -8.0 | -16.9 | -42.0 | 24 | -37.3 | 5.3 | -42.8 | -2.9 | 1.7 | -9.3 | -39.4 | -36.6 | 0.4 | -1.6 | 1.0 | -11.3 | 4.5 | 7.2 | -12.2 | 5.3 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 4000000.0 | -1100000.0 | -600000.0 | -1600000.0 |
| Percentage of PaymentsForProceedsFromOtherInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 20 | 18 | 19 | 24 | 21 |
| Percentage of PaymentsForRestructuring | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 10 | 15 | 13 | 19 | 17 |
| Percentage of PaymentsForRestructuring | 51.2 | 82.5 | 69.3 | 79.6 | 81.9 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 9.8 | 3.3 | 5.9 | 5.0 | 3.9 |
| Percentage of PaymentsForRestructuring | 48.8 | 17.5 | 30.7 | 20.4 | 18.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 35 | 9.9 | 21 | 7.8 | 14 | 7.9 | 5.6 | 8.3 | 12 | 6.4 | 14 | 24 | 6.3 | 6.7 | 5.8 | 4.8 | 10 | 11 | 14 | 18 | 8.2 | 13 | 18 | 9.7 | 8.0 | 12 | 8.7 | 11 | 6.8 | 10 | 5.2 | 7.8 | 20 | 8.8 | 10 | 6.1 | 9.8 | 5.8 | 4.4 | 4.6 | 1.5 | 2.5 | 2.2 | 13 | 5.9 | 3.9 |
| Percentage of PaymentsForSoftware | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 14 |
| Percentage of PaymentsOfDebtExtinguishmentCosts | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 3.9 | 78 | 17 | 5.7 | 24 | 21 | 19 | 2.7 | 9.4 | 15 | 40 | 90 | 8.9 | 10 | 28 | 25 | 13 | 6.8 | 21 | 25 | 39 | 20 | 12 | 35 | 57 | 17 | 24 | 4.6 | 27 | 16 | 50 | 26 | 30 | 11 | 57 | 38 | 22 | 55 | 20 | 31 | 37 | 7.1 | 7.5 | 14 | 9.3 | 3.7 |
| Percentage of PaymentsToAcquireIntangibleAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 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 | 0.9 | 0.5 | 2.2 | -0.4 | 2.7 | 0.4 | 4.1 | 17 | 4.4 | -1.8 | 4.3 | 0.5 | 165 | 4.4 | 21 | 20 | 9.2 | 23 | 11 | -0.3 | 11 | 100 | 0.0 | 0.0 |
| Percentage of PaymentsToAcquireOtherInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 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 | 3900000.0 | 100000.0 | 0 | 0 | 0 | -700000.0 | -3200000.0 | -100000.0 | -700000.0 | -100000.0 | -2600000.0 | -1400000.0 | 0 | -5200000.0 | -1300000.0 | 0 | 0 | 0 |
| Percentage of ProceedsFromPaymentsForOtherFinancingActivities | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 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 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-06-30 | 2016-03-31 | 2015-06-30 | 2015-03-31 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | 265 | -80.0 | 30 | -50.0 | 15 | -160.0 | -190.0 | 167 | 208 | -65.0 | -244.0 | 369 | -110.0 | 110 | -445.0 | 135 | 310 | 0.0 | 0.0 | 0.0 | 0.0 | -95.0 | 130 | 0.0 | 0.0 | 0.0 | 0.0 | -150.0 | -240.0 | 40 | 53 | 297 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromRepaymentsOfCommercialPaper | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.5 | 0.5 | -0.2 | 0.3 | 0.3 | 3.6 | 0.0 | 0.0 | 19 | 1.2 | -0.4 | 2.9 | 10.0 | 160 | 22 | 21 | 0.0 | 30 | 11 | 0.0 | 11 | 100 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromSaleAndMaturityOfOtherInvestments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 5.2 | 0.0 | 0.0 | 44 |
| Percentage of ProceedsFromSaleOfBuildings | 100.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2021-04-12 |
| Value | 50 |
| Percentage of ProceedsFromSaleOfEquityMethodInvestments | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 3.5 | 8.1 | 0.5 | 0.2 | 0.5 | 1.0 | 8.7 | 7.5 | 18 | 1.8 | 0.8 | 0.4 | 5.1 | 3.8 | 3.3 | 1.2 | 1.4 | 5.8 | 3.3 | 22 | 2.4 | 7.2 | 0.5 | -2.5 | 45 | 32 | 5.6 | 3.0 | 2.6 | 3.0 | 7.5 | 17 | 2.2 | 1.7 | 1.1 | 7.3 | 3.8 | 41 | 5.8 | 2.6 | 19 | 72 | 23 | 7.1 | 3.3 | 8.6 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.7 | 1.2 | 0.2 |
| Percentage of ProvisionForDoubtfulAccounts | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 8.4 | 11 | 8.1 |
| Percentage of ProvisionForDoubtfulAccounts | 1200.0 | 983.3 | 4050.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 1.9 | 1.5 | 1.2 | 0.2 |
| Percentage of ProvisionForLoanLossesExpensed | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | 3.2 | 2.3 | 11 | 8.1 |
| Percentage of ProvisionForLoanLossesExpensed | 168.4 | 153.3 | 983.3 | 4050.0 |
| 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 | -3.3 | -6.1 | -6.0 | -3.6 | 4.2 | 6.6 | 4.6 | 6.1 | 2.1 | 1.4 | -0.3 | 0.2 | -5.4 | -9.4 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 100.0 | 100.0 | 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 |
| Value | -0.2 | -0.2 | -0.2 | -0.1 | -0.1 | -0.2 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 6.1 | 3.3 | 3.3 | 2.8 | -2.4 | -3.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 0.7 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | -0.0 | -11.5 |
| 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 | -3.3 | -6.1 | -3.6 | 4.2 | 6.6 | 6.1 | 2.1 | 1.4 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 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 |
| Value | -0.2 | -0.2 | -0.1 | -0.1 | -0.2 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 6.1 | 3.3 | 2.8 | -2.4 | -3.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 0.7 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | -0.0 | -11.5 |
| 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 | -3.0 | -3.1 | -2.9 | -3.1 | -3.0 | -2.7 | -2.7 | -2.7 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 90.9 | 50.8 | 80.6 | -73.8 | -45.5 | -44.3 | -128.6 | -192.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 |
| Value | -0.1 | -0.1 | 0.0 | 0.3 | 0.6 | 0.0 | 0.6 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax | 3.0 | 1.6 | -0.0 | 7.1 | 9.1 | 0.0 | 28.6 |
| 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 | -5.9 | -8.2 | -6.0 | 2.3 | 4.4 | 3.7 | 0.6 | -1.1 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax | 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 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -2.3 | -2.5 | -2.7 | -2.3 | -2.1 | -2.3 | -1.7 | -2.3 | -1.9 | -2.5 | -2.4 | -2.3 | -2.1 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax | 39.0 | 30.5 | 0.0 | 38.3 | -91.3 | -52.3 | 0.0 | -62.2 | -316.7 | 227.3 | 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 |
| Value | -3.5 | -5.6 | -6.0 | -3.7 | 4.1 | 6.3 | 4.6 | 6.0 | 2.1 | 1.4 | -0.2 | -6.1 | -9.7 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax | 59.3 | 68.3 | 0.0 | 61.7 | 178.3 | 143.2 | 0.0 | 162.2 | 350.0 | -127.3 | 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 | 2018-06-30 | 2018-03-31 |
| Value | -0.1 | -0.1 | -0.2 | 0.0 | 0.3 | 0.4 | 0.1 | 0.0 | 0.4 | 0.1 | -0.4 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax | 1.7 | 1.2 | 0.0 | -0.0 | 13.0 | 9.1 | 0.0 | 0.0 | 66.7 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | -5.9 | -8.2 | -6.0 | 2.3 | 4.4 | 3.7 | 0.6 | -1.1 | -2.6 | -8.3 | -12.2 |
| Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax | 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 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 700000.0 | 600000.0 | 600000.0 | 1000000.0 | 700000.0 | 400000.0 | 800000.0 | 200000.0 |
| Percentage of ReclassificationFromAociCurrentPeriodTax | 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 |
| Value | 0 | 0 | -100000.0 | -100000.0 |
| Percentage of ReclassificationFromAociCurrentPeriodTax | 0.0 | 0.0 | -14.3 | -25.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 |
| Value | 0 | 0 | -200000.0 | 0 | -200000.0 |
| Percentage of ReclassificationFromAociCurrentPeriodTax | 0.0 | 0.0 | -28.6 | 0.0 | -25.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 |
| Value | 14 | 13 | 14 | 14 | 12 | 12 | 15 | 14 | 14 | 13 | 14 | 14 | 14 | 13 | 16 | 16 | 17 | 16 | 17 | 17 | 17 | 15 | 16 | 15 | 17 | 15 | 18 | 18 | 17 | 15 | 17 | 16 | 16 | 15 |
| Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 12 | 9.1 | 5.2 | 10 | 16 | 91 | 7.4 | 35 | 9.9 | 35 | 14 |
| Percentage of RestructuringCharges | 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 |
| Value | 2.0 | 0.8 | 0.8 | 0.9 | 5.9 | 33 |
| Percentage of RestructuringCharges | 16.7 | 8.8 | 15.4 | 8.6 | 35.5 | 37.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 9.999999999999996 | 8.3 | 4.4 | 9.6 | 10 | 57 | 7.4 |
| Percentage of RestructuringCharges | 83.3 | 91.2 | 84.6 | 91.4 | 64.5 | 63.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 2.4 | 6.0 | 0.2 | 3.2 | 9.6 |
| Percentage of RestructuringCharges | 20.0 | 65.9 | 3.8 | 30.5 | 57.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 9.6 | 3.1 | 5.0 | 7.3 | 7.0 |
| Percentage of RestructuringCharges | 80.0 | 34.1 | 96.2 | 69.5 | 42.2 |
| 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 |
| Value | 50 | 43 | 39 | 44 | 59 | 67 | 62 | 68 | 65 | 61 | 58 | 55 | 49 |
| Percentage of RevenueNotFromContractWithCustomerOther | 100.0 | 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 |
| Value | 3.4 | 3.0 | 3.2 | 2.9 | 2.6 | 5.3 | 7.3 | 9.2 | 11 | 9.5 | 8.8 | 7.4 | 6.5 |
| Percentage of RevenueNotFromContractWithCustomerOther | 6.7 | 6.9 | 8.2 | 6.6 | 4.4 | 7.9 | 11.6 | 13.4 | 17.3 | 15.4 | 15.0 | 13.3 | 13.1 |
| 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 |
| Value | 18 | 12 | 13 | 16 | 28 | 29 | 25 | 30 | 24 | 23 | 21 | 22 | 17 |
| Percentage of RevenueNotFromContractWithCustomerOther | 35.6 | 28.6 | 33.4 | 36.9 | 47.9 | 43.5 | 39.9 | 44.4 | 37.7 | 37.5 | 36.8 | 40.6 | 35.3 |
| 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 |
| Value | 24 | 23 | 18 | 19 | 22 | 26 | 24 | 22 | 22 | 22 | 22 | 20 | 20 |
| Percentage of RevenueNotFromContractWithCustomerOther | 47.8 | 52.9 | 46.2 | 44.6 | 37.9 | 39.8 | 39.1 | 32.9 | 34.8 | 36.7 | 38.3 | 36.3 | 40.4 |
| 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 |
| Value | 5.0 | 5.1 | 4.8 | 5.3 | 5.8 | 6.0 | 5.9 | 6.4 | 6.7 | 6.4 | 5.8 | 5.4 | 5.6 |
| Percentage of RevenueNotFromContractWithCustomerOther | 9.9 | 11.7 | 12.2 | 12.0 | 9.8 | 8.9 | 9.4 | 9.3 | 10.2 | 10.4 | 9.9 | 9.7 | 11.2 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 10 | 10 | 15 | 2.7 | 0.0 | 0.0 | 0.0 | 269 |
| Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2021-04-12 |
| Value | 50 |
| Percentage of SaleOfStockConsiderationReceivedOnTransaction | 100.0 |
| Period End | 2020-11-21 |
| Value | 10.0 |
| Percentage of SaleOfStockPercentageOfOwnershipAfterTransaction | 100.0 |
| Period End | 2020-11-21 |
| Value | 5.0 |
| Percentage of SaleOfStockPercentageOfOwnershipAfterTransaction | 50.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0.02 | 23.63 | -0.52 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0 | 500000.0 | 0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | 0.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0 | 23.91 | 0 |
| Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice | 0.0 | 100.0 | 0.0 |
| 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 |
| Value | 0.2 | 2.3 | 0.2 | 2.1 | 0.5 | 1.3 | 1.9 | 0.2 | 0.5 | 2.1 |
| Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 3.5 | 8.1 | 0.2 | 0.5 | 1.0 | 7.6 | 18 | 1.8 | 0.4 | 5.1 | 3.8 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 3.5 | 8.1 | 0.2 | 0.5 | 1.0 | 7.6 | 18 | 1.8 | 0.4 | 5.1 | 3.8 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 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 |
| Value | 3.0 | 3.7 | 0.1 | 9.2 | 6.5 | 8.3 | 10 | 5.2 | 12 | 0.5 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodShares | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 75 | 89 | 0.4 | 0.6 | 235 | 140 | 161 | 185 | 101 | 250 | 11 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 75 | 89 | 0.4 | 0.6 | 235 | 140 | 161 | 184 | 101 | 250 | 11 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.9 | 100.0 | 99.9 | 99.9 | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 2.3 | 0.4 | 0.8 | 1.9 | -1.2 | 1.5 | 1.2 | 2.5 | 1.0 | -3.1 | 1.6 | 1.6 | 4.9 | -4.1 | 0.5 | -5.6 | 0.2 | 3.2 | -0.2 | 1.1 | 1.0 | -0.5 | 1.6 | 0.6 | -0.1 | -5.0 | 1.3 | 1.2 | 0.7 | 0.5 | 1.1 | 0.4 | -1.5 | -10.2 | 2.6 | 0.6 | 3.0 | 2.3 | 1.9 | 0.3 | 2.4 |
| Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 2200000.0 | 2600000.0 | 3000000.0 | 2100000.0 | 4000000.0 | 3500000.0 | 2300000.0 | 2200000.0 | 2200000.0 | 2400000.0 | 3300000.0 | 2600000.0 | 2600000.0 | 3600000.0 | 3300000.0 | 2700000.0 | 3200000.0 | 3600000.0 | 4600000.0 | 4200000.0 | 3400000.0 | 2800000.0 | 3300000.0 | 3700000.0 | 2600000.0 | 2100000.0 | 2700000.0 | 2200000.0 | 2800000.0 | 2200000.0 | 4700000.0 | 5200000.0 | 2200000.0 | 2300000.0 | 2300000.0 |
| Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0 |
| Percentage of AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation | 0.0 |
| Period End | 2020-09-30 |
| Value | -700000.0 |
| Percentage of AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation | 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 | 1.6 | 1.9 | 1.7 | 2.4 | 2.8 | 3.5 | 3.4 | 3.0 | 2.8 | 2.3 | 2.0 | 1.3 | 0.8 | 0.2 |
| Percentage of DerivativeExcludedComponentBasedOnAmortizationApproach | 100.0 | 100.0 | 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 | 14 | 13 | 11 | 9.2 |
| Percentage of FinancingReceivableLossesNotCreditRelated | 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 | -3.2 | -21.8 | 9.6 | 1.4 | 3.0 | -51.0 | 5.4 | -23.4 | -4.3 | -10.8 | -12.8 | -8.2 | -33.6 | 2.3 |
| Percentage of ForeignExchangeGainLossOnSettlementAssetsAndObligationsOtherAssetsAndOtherLiabilitiesAndCashBalances | 100.0 | 100.0 | 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 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | 87 | 84 | 77 | 76 | 70 | 87 | 86 | 88 | 84 | 84 | 85 | 88 | 82 | 85 | 83 | 88 | 85 | 83 | 88 | 85 | 89 | 89 | 87 | 90 | 94 | 87 | 90 | 90 | 92 | 88 | 84 | 83 | 85 | 82 | 80 | 65 | 32 | 30 | 26 |
| Percentage of ForeignExchangeRevenues | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -1600000.0 | -700000.0 | 3500000.0 | 400000.0 | -600000.0 | 1200000.0 | 500000.0 | 700000.0 | -400000.0 | 0 | -200000.0 |
| Percentage of GainLossExcludedFromEffectivenessTestingRecognizedInOtherComprehensiveIncomeBasedOnAmortizationApproach | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 |
| Value | -300000.0 | -700000.0 | -700000.0 | 3500000.0 |
| Percentage of GainLossExcludedFromEffectivenessTestingRecognizedInOtherComprehensiveIncomeBasedOnAmortizationApproach | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2019-06-30 |
| Value | 9.4 | 7.4 | 5.5 | 12 | 71 | 6.0 |
| Percentage of RestructuringChargesNetOfTax | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | -200000.0 | -100000.0 | 1400000.0 | 100000.0 | 1400000.0 |
| Percentage of RestructuringReserveNoncashBenefitsCharges | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | -400000.0 | -100000.0 | 0 | -100000.0 | -200000.0 |
| Percentage of RestructuringReserveNoncashBenefitsCharges | 200.0 | 100.0 | 0.0 | -100.0 | -14.3 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 200000.0 | 0 | 1400000.0 | 200000.0 | 1600000.0 |
| Percentage of RestructuringReserveNoncashBenefitsCharges | -100.0 | -0.0 | 100.0 | 200.0 | 114.3 |
| 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 | 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 | 0.18 | 24.24 | 0 | 0 | 0 | 25.45 | 0.59 | 0.75 | 0.67 | 18.06 | -0.26 | -0.27 | 0.01 | -0.15 | -0.3 | 19.99 | 0.19 | 0.41 | 0.15 | 18.66 | -0.16 | -0.35 | 0.97 | 19.5 | 0.01 | 0.23 | -0.05 | 16.44 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodExcludingWTCAndCommissionsAverageCostPerShare | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 3.0 | 3.1 | 0.0 | 0.0 | 0.0 | 8.5 | 2.5 | 6.5 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodExcludingWTCShares | 100.0 | 100.0 | 0.0 | 0.0 | 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 | 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 | 75 | 75 | 0.0 | 0.0 | 0.0 | 217 | 64 | 139 | 160 | 175 | 49 | 100 | 12 | 100 | 150 | 224 | 79 | 84 | 77 | 240 | 68 | 124 | 156 | 150 | 43 | 121 | 143 | 179 |
| Percentage of StockRepurchasedAndRetiredDuringPeriodExcludingWTCandCommissionsValue | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 499 | 513 | 500 | 457 | 466 | 491 | 601 | 574 | 467 | 471 | 564 | 593 | 587 | 594 | 718 | 590 | 523 | 973 | 1129 | 557 | 512 | 579 | 606 | 648 | 587 | 580 | 600 | 596 | 553 | 574 | 638 | 599 | 541 | 524 | 556 | 579 | 496 | 498 | 535 | 567 | 483 | 528 | 520 | 501 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 53 | 58 | 100 |
| Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent | 10.6 | 9.6 | 17.7 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 1107 | 1274 | 956 |
| Percentage of AccountsReceivableGross | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 69 | 61 | 76 |
| Percentage of AccountsReceivableGross | 6.3 | 4.9 | 8.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 992 | 1171 | 851 |
| Percentage of AccountsReceivableGross | 89.6 | 91.9 | 88.9 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 1061 | 1233 | 927 | 1230 | 14 | 15 | 14 | 13 | 12 |
| Percentage of AccountsReceivableNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 861 | 933 | 928 | 926 | 1005 | 1016 | 1019 | 1008 | 1076 | 1085 | 1054 | 1076 | 1164 | 1262 | 1252 | 464 | 403 | 402 | 407 | 235 | 213 | 222 | 211 | 199 | 176 | 186 | 166 | 201 | 202 | 221 | 216 | 196 | 210 | 228 | 218 | 233 | 189 | 259 | 302 | 480 | 423 | 411 | 356 | 519 |
| Percentage of AccruedIncomeTaxes | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 551 | 680 | 727 |
| Percentage of AccruedIncomeTaxes | 59.4 | 66.7 | 69.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 45 | 40 | 29 | 42 | 47 | 64 | 55 | 41 | 37 | 38 | 46 | 28 | 21 | 33 |
| Percentage of AllowanceForDoubtfulAccountsReceivable | 100.0 | 100.0 | 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 |
| Value | 4.7 | 4.8 | 3.7 | 4.5 |
| Percentage of AllowanceForDoubtfulAccountsReceivable | 10.3 | 11.8 | 12.5 | 10.7 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 40 | 35 | 25 | 20 |
| Percentage of AllowanceForDoubtfulAccountsReceivable | 89.7 | 88.2 | 87.5 | 48.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 680 | 610 | 365 | 265 | 320 | 300 | 335 | 305 |
| Percentage of AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 680 | 610 |
| Percentage of AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 11 | 15 | 13 | 116 | 22 | 24 | 34 | 40 | 19 | 24 | 60 | 9.8 | 9.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 47 | 47 | 0.0 | 0.0 | 0.0 | 100 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1832 | 1928 | 2443 | 2476 | 2168 | 2055 | 1892 | 1863 | 1738 | 1557 | 1446 | 1613 | 1885 | 1534 | 1425 | 1597 | 1484 | 1727 | 1676 | 1568 | 1806 | 1940 | 2485 | 1848 | 1729 | 1489 | 1678 | 1974 | 1611 | 1986 | 2033 | 1683 | 1456 | 1627 | 1377 | 1438 |
| Percentage of AssetsFairValueDisclosure | 16656.4 | 12282.8 | 18655.7 | 2133.3 | 9469.4 | 8456.8 | 5470.8 | 4566.2 | 9056.8 | 6330.1 | 2386.8 | 16467.3 | 19040.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5277.9 | 3924.4 | 0.0 | 0.0 | 0.0 | 1970.9 | 0.0 | 0.0 | 2033200.0 | 1683600.0 | 1456700.0 | 1627200.0 | 1377700.0 | 1438800.0 |
| 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1843 | 1944 | 2457 | 2592 | 2191 | 2079 | 1927 | 1903 | 1758 | 1581 | 1507 | 1623 | 1894 | 1534 | 1425 | 1597 | 1484 | 1727 | 1676 | 1568 | 1806 | 1940 | 2533 | 1895 | 1729 | 1489 | 1678 | 2075 | 1611 | 1986 | 2033 | 1683 | 1456 | 1627 | 1377 | 1438 |
| Percentage of AssetsFairValueDisclosure | 16756.4 | 12382.8 | 18755.7 | 2233.3 | 9569.4 | 8556.8 | 5570.8 | 4666.2 | 9156.8 | 6430.1 | 2486.8 | 16567.3 | 19140.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5377.9 | 4024.4 | 0.0 | 0.0 | 0.0 | 2070.9 | 0.0 | 0.0 | 2033300.0 | 1683700.0 | 1456800.0 | 1627300.0 | 1377800.0 | 1438900.0 |
| 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 | 2017-12-31 |
| Value | 59 | 57 | 72 | 71 | 62 | 40 | 32 | 35 | 28 | 16 | 6.1 | 8.1 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 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 | 2019-12-31 |
| Value | 0.8 | 0.8 | 1.1 | 0.1 | 0.1 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 1.3 | 1.4 | 1.7 | 0.2 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 1.6 | 1.7 | 1.5 | 1.7 | 1.7 | 1.4 | 0.9 | 0.6 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 2.7 | 3.0 | 2.1 | 2.4 | 2.7 | 3.5 | 2.8 | 1.7 |
| Period End | 2020-09-30 | 2019-06-30 | 2019-03-31 | 2017-12-31 |
| Value | 1.2 | 0.6 | 0.3 | 0.2 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 1.7 | 2.1 | 1.8 | 2.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 57 | 55 | 69 | 68 | 60 | 38 | 31 | 34 | 27 | 16 | 6.1 | 7.9 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 96.0 | 95.7 | 96.3 | 95.9 | 95.5 | 96.3 | 96.3 | 98.0 | 97.5 | 98.2 | 100.0 | 97.5 |
| Period End | 2020-12-31 |
| Value | 1.2 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 1.7 |
| 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 | 2017-12-31 |
| Value | 500000.0 | 900000.0 | 100000.0 | 500000.0 | 2000000.0 | 600000.0 | 200000.0 | 400000.0 | 1400000.0 | 7500000.0 | 4000000.0 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | 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 | 2020-03-31 |
| Value | 200000.0 | 100000.0 | 200000.0 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | 40.0 | 11.1 | 10.0 |
| 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 | 2017-12-31 |
| Value | 300000.0 | 800000.0 | 100000.0 | 500000.0 | 1800000.0 | 600000.0 | 200000.0 | 300000.0 | 1000000.0 | 6800000.0 | 3600000.0 |
| Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | 60.0 | 88.9 | 100.0 | 100.0 | 90.0 | 100.0 | 100.0 | 75.0 | 71.4 | 90.7 | 90.0 |
| 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 | 2017-12-31 |
| Value | 1498 | 1548 | 1918 | 2111 | 1839 | 1615 | 1666 | 1569 | 1518 | 1350 | 1212 | 1346 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 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 | 2019-12-31 | 2019-09-30 |
| Value | 65 | 51 | 65 | 34 | 52 | 43 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 4.4 | 3.4 | 3.6 | 2.1 | 3.1 | 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 |
| Value | 43 | 46 | 50 | 55 | 58 | 63 | 66 | 69 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 2.9 | 3.0 | 2.6 | 2.6 | 3.2 | 3.9 | 4.0 | 4.4 |
| Period End | 2020-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 80 | 74 | 75 | 70 | 60 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 3.8 | 4.9 | 5.6 | 5.8 | 4.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 1239 | 1218 | 1234 | 1263 | 1274 | 1310 | 1227 | 1197 | 1117 | 969 | 963 | 955 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 82.7 | 78.7 | 64.3 | 59.8 | 69.3 | 81.1 | 73.6 | 76.3 | 73.6 | 71.8 | 79.5 | 71.0 |
| 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 | 2017-12-31 |
| Value | 150 | 231 | 562 | 712 | 441 | 207 | 276 | 213 | 316 | 295 | 168 | 319 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 10.0 | 15.0 | 29.3 | 33.8 | 24.0 | 12.8 | 16.6 | 13.6 | 20.8 | 21.9 | 13.9 | 23.7 |
| Period End | 2020-12-31 |
| Value | 71 |
| Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis | 3.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2015-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 |
| Value | 149 | 122 | 176 | 174 | 182 | 177 | 173 | 209 | 189 | 170 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue | 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 | 2019-12-31 |
| Value | 15 | 7.6 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue | 10.1 | 4.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 |
| Value | 235 | 317 | 677 | 834 | 594 | 361 | 418 | 420 | 492 | 461 | 323 | 68 | 229 | 621 | 393 | 233 | 465 | 660 | 503 | 233 | 826 | 851 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 135 | 215 | 546 | 695 | 425 | 191 | 239 | 205 | 287 | 295 | 155 | 246 | 202 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue | 57.5 | 67.8 | 80.6 | 83.4 | 71.6 | 52.9 | 57.3 | 48.9 | 58.3 | 64.0 | 48.1 | 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 | 2018-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 |
| Value | 540 | 500 | 452 | 470 | 463 | 525 | 511 | 403 | 276 | 475 | 493 | 461 | 384 | 434 | 398 | 248 | 86 | 57 | 79 | 153 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2018-12-31 | 2018-06-30 |
| Value | 0.9 | 0.9 | 2.0 | 1.0 | 11 | 0.4 | 21 | 13 | 3.4 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue | 0.2 | 0.2 | 0.4 | 0.2 | 2.1 | 0.1 | 5.3 | 4.7 | 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 | 2015-06-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 |
| Value | 632 | 663 | 684 | 702 | 680 | 622 | 572 | 508 | 508 | 519 | 446 | 364 | 510 | 698 | 725 | 760 | 688 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 15 | 15 | 15 | 15 | 16 | 17 | 7.6 | 7.6 |
| Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue | 2.3 | 2.2 | 2.1 | 2.2 | 2.6 | 3.1 | 1.5 | 1.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 1557 | 1604 | 1990 | 2182 | 1902 | 1653 | 1698 | 1604 | 1546 | 1366 | 1210 | 1350 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 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 | 2019-12-31 | 2019-09-30 |
| Value | 66 | 52 | 66 | 34 | 52 | 43 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 4.3 | 3.3 | 3.5 | 2.1 | 3.1 | 2.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 45 | 48 | 51 | 56 | 60 | 64 | 67 | 70 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 2.9 | 3.0 | 2.6 | 2.6 | 3.2 | 3.9 | 4.0 | 4.4 |
| Period End | 2020-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 81 | 75 | 75 | 69 | 60 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 3.7 | 4.9 | 5.6 | 5.7 | 4.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 1296 | 1272 | 1303 | 1331 | 1333 | 1347 | 1257 | 1232 | 1144 | 984 | 962 | 960 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 83.2 | 79.3 | 65.5 | 61.0 | 70.1 | 81.5 | 74.1 | 76.8 | 74.0 | 72.1 | 79.5 | 71.1 |
| 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 | 2017-12-31 |
| Value | 150 | 231 | 562 | 712 | 441 | 207 | 276 | 213 | 316 | 295 | 168 | 319 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 9.6 | 14.4 | 28.2 | 32.7 | 23.2 | 12.5 | 16.3 | 13.3 | 20.5 | 21.6 | 13.9 | 23.7 |
| Period End | 2020-12-31 |
| Value | 72 |
| Percentage of AvailableForSaleSecuritiesDebtSecurities | 3.7 |
| Period End | 2020-09-30 | 2018-12-31 |
| Value | 100 | 27 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 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 |
| Value | 11 | 15 | 13 | 16 | 22 | 24 | 24 | 30 | 9.2 | 14 | 23 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 0.0 | 0.0 | 0.0 | 16.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 88.5 |
| Period End | 2020-09-30 | 2018-12-31 |
| Value | 100 | 27 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2018-12-31 |
| Value | 100 | 27 |
| Percentage of CashAndCashEquivalentsFairValueDisclosure | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 3015 | 3250 | 3080 | 3050 | 3100 | 3085 | 3245 | 3259 | 3092 | 3384 | 3449 | 3311 | 3349 | 3159 | 3049 | 3549 | 3644 | 3509 | 2799 | 3230 | 3230 | 3230 | 3230 | 3480 | 3730 | 3730 | 3730 | 3730 | 3765 | 3860 | 4230 | 3980 | 3730 | 3730 | 4030 | 3430 | 3670 | 3580 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 | 2016-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 265 | 80 | 50 | 100 | 85 | 245 | 435 | 268 | 60 | 125 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of DebtInstrumentFaceAmount | 8.8 | 2.6 | 1.6 | 3.2 | 2.8 | 7.6 | 13.3 | 8.7 | 1.8 | 3.6 | 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 | 2018-12-18 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-10-31 | 2015-12-31 |
| Value | 300 | 300 | 950 | 950 | 950 | 950 | 950 | 950 | 950 | 950 | 950 | 950 | 567 | 575 | 575 | 575 | 575 | 575 | 575 | 575 | 575 | 0.0 |
| Percentage of DebtInstrumentFaceAmount | 10.0 | 9.2 | 30.8 | 31.1 | 30.6 | 30.8 | 29.3 | 29.1 | 30.7 | 28.1 | 27.5 | 0.0 | 17.1 | 17.2 | 18.2 | 18.9 | 16.2 | 15.8 | 16.4 | 20.5 | 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 | 2017-08-22 | 2017-06-30 | 2017-03-31 | 2017-03-15 | 2016-12-31 |
| Value | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 100 | 400 | 400 | 400 | 0.0 |
| Percentage of DebtInstrumentFaceAmount | 15.4 | 16.2 | 16.4 | 16.1 | 16.2 | 15.4 | 15.3 | 16.2 | 14.8 | 14.5 | 15.1 | 14.9 | 15.8 | 16.4 | 14.1 | 0.0 | 11.0 | 11.4 | 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 | 2018-06-11 | 2017-12-31 |
| Value | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 0.0 |
| Percentage of DebtInstrumentFaceAmount | 10.0 | 9.2 | 9.7 | 9.8 | 9.7 | 9.7 | 9.2 | 9.2 | 9.7 | 8.9 | 8.7 | 9.1 | 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 | 3258 | 3450 | 3348 | 3253 | 3256 | 3001 | 3372 | 3383 | 3175 | 3415 | 3394 | 3323 | 3363 | 3213 | 3146 | 3641 | 3725 | 3566 | 2888 | 3328 | 3340 | 3300 | 3279 | 3555 | 3890 |
| Percentage of DebtInstrumentFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2996 | 3230 | 3067 | 3036 | 3085 | 3070 | 3229 | 3248 | 3080 | 3370 | 3433 | 3295 | 3331 | 3143 | 3033 | 3533 | 3627 | 3490 | 2786 | 3224 | 3228 | 3225 | 3225 | 3483 | 3725 | 3720 |
| Percentage of DebtInstrumentFairValue | 92.0 | 93.6 | 91.6 | 93.3 | 94.8 | 102.3 | 95.8 | 96.0 | 97.0 | 98.7 | 101.2 | 99.1 | 99.1 | 97.8 | 96.4 | 97.0 | 97.4 | 97.9 | 96.4 | 96.9 | 96.7 | 97.7 | 98.4 | 98.0 | 0.0 | 95.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2019-06-30 | 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 | 1.4 | 1.5 | 1.4 | 1.4 | 0.031 | 0.037 | 0.038 | 0.038 | 0.036 | 0.036 | 0.033 | 0.03 | 0.028 | 0.026 | 0.024 | 0.022 |
| Percentage of DebtInstrumentInterestRateEffectivePercentage | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2015-12-31 |
| Value | 18 | 19 | 12 | 13 | 14 | 14 | 15 | 12 | 13 | 14 | 16 | 15 | 17 | 15 | 16 | 18 | 19 | 20 | 18 | 18 | 19 | 22 |
| Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 |
| Value | 59 | 56 | 72 | 71 | 62 | 38 | 31 | 35 | 27 | 15 | -1.4 | 4.1 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 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 | 2019-12-31 |
| Value | 0.6 | 0.7 | 1.1 | -0.1 | 0.1 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 1.0 | 1.2 | 1.8 | -0.3 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 1.6 | 1.7 | 1.5 | 1.7 | 1.7 | 1.4 | 0.9 | 0.6 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 2.7 | 3.0 | 2.1 | 2.4 | 2.7 | 3.7 | 2.8 | 1.7 |
| Period End | 2020-09-30 | 2019-06-30 | 2018-12-31 | 2017-12-31 |
| Value | 1.2 | 0.5 | -0.5 | -0.1 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 1.7 | 1.8 | 35.7 | -2.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2017-12-31 |
| Value | 56 | 54 | 69 | 68 | 59 | 36 | 30 | 34 | 27 | 15 | -0.7 | 4.3 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 96.3 | 95.8 | 96.3 | 95.9 | 95.5 | 96.6 | 96.2 | 98.0 | 97.8 | 100.6 | 50.0 | 104.9 |
| Period End | 2020-12-31 |
| Value | 1.2 |
| Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax | 1.7 |
| 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 | 2018-09-30 | 2018-03-31 | 2017-06-30 | 2017-03-31 | 2014-06-30 | 2014-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 |
| Value | 3.3 | 3.6 | 3.5 | 3.6 | 0.035 | 0.039 | 0.04 | 0.043 | 0.045 | 0.046 | 0.044 | 0.045 | 0.04 | 0.039 | 0.044 | 0.043 | 0.05 | 0.047 | 0.048 | 0.048 |
| Percentage of DebtWeightedAverageInterestRate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 0.2 | 0.3 | 0.3 | 0.004 | 0.035 | 0.021 | 0.024 | 0.026 | 0.027 |
| Percentage of DebtWeightedAverageInterestRate | 6.1 | 8.6 | 8.3 | 11.4 | 89.7 | 52.5 | 55.8 | 57.8 | 58.7 |
| Period End | 2020-12-31 |
| Value | 3000000.0 |
| Percentage of DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 255 | 240 | 228 | 240 | 408 | 423 | 433 | 434 | 481 | 502 |
| Percentage of DeferredIncomeTaxLiabilities | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Value | 15 | 13 | 8.5 | 11 | 9.7 | 7.9 |
| Percentage of DeferredTaxAssetsGross | 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 |
| Value | 30 | 31 | 29 | 27 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwards | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 8.6 | 5.3 | 5.3 | 10 | 14 | 10 | 13 | 26 | 22 | 20 | 20 | 10 |
| Percentage of DeferredTaxAssetsOther | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 22 | 38 | 42 | 44 | 279 | 87 | 81 | 57 | 65 | 40 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals | 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 | 2019-12-31 |
| Value | 23 | 28 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 15 | 18 |
| Percentage of DeferredTaxLiabilitiesLeasingArrangements | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 14 | 6.9 | 0.9 | 14 | 12 | 5.5 | 3.1 | 0.0 | 2.5 | 1.0 |
| Percentage of DeferredTaxLiabilitiesOther | 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 |
| Value | 7800000.0 |
| Percentage of DeferredTaxLiabilitiesPrepaidExpenses | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2017-12-31 |
| Value | 604 | 668 | 800 |
| Percentage of DeferredTaxLiabilitiesUndistributedForeignEarnings | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 39 |
| Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 1.66 | 0.0266 | 0.0379 | 0.0311 | 0.034 | 0.0352 | 0.0327 | 0.0391 | 0.0303 | 0.0372 | 0.0469 | 0.053 |
| Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 240 | 248 | 250 | 286 | 306 | 346 | 377 | 366 | 418 | 414 | 402 | 400 | 398 |
| Percentage of DefinedBenefitPlanBenefitObligation | 100.0 | 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 | 73 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter | 100.0 |
| Period End | 2020-12-31 |
| Value | 25 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths | 100.0 |
| Period End | 2020-12-31 |
| Value | 19 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 20 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour | 100.0 |
| Period End | 2020-12-31 |
| Value | 22 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree | 100.0 |
| Period End | 2020-12-31 |
| Value | 24 |
| Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 280 | 237 | 234 | 271 | 280 | 276 | 302 | 295 | 316 | 301 | 290 | 275 | 291 |
| Percentage of DefinedBenefitPlanFairValueOfPlanAssets | 100.0 | 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 | 274 | 323 | 453 | 294 | 266 | 401 | 204 | 268 | 202 | 200 | 245 | 225 | 262 | 282 | 273 | 355 | 296 | 262 | 365 | 366 | 428 | 476 | 396 | 448 | 411 | 423 |
| Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 49 | 29 | 10.0 | 9.1 | 32 | 91 | 20 | 104 | 54 | 59 | 66 | 64 | 57 | 18 | 16 | 18 | 17 | 59 | 109 | 54 | 102 | 57 | 105 | 134 | 99 | 120 |
| Percentage of DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 109 | 128 | 155 | 99 | 84 | 147 | 74 | 95 | 81 | 76 | 95 | 91 | 113 | 113 | 98 | 141 | 117 | 104 | 146 | 143 | 158 | 147 | 119 | 94 | 114 | 134 |
| Percentage of DerivativeAssetNotOffsetPolicyElectionDeduction | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 116 | 166 | 288 | 186 | 148 | 162 | 109 | 69 | 66 | 64 | 82 | 68 | 90 | 151 | 158 | 195 | 161 | 97 | 109 | 167 | 168 | 271 | 172 | 220 | 196 | 167 |
| Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 274 | 323 | 453 | 294 | 266 | 401 | 204 | 268 | 202 | 200 | 245 | 225 | 262 | 282 | 273 | 355 | 296 | 262 | 365 | 366 | 428 | 476 | 396 | 448 | 411 | 676 | 423 | 333 | 224 |
| Percentage of DerivativeAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2015-12-31 |
| Value | 20 | 22 | 9.1 | 5.2 | 17 | 37 | 21 | 40 | 26 | 30 | 28 | 19 | 18 | 7.3 | 8.0 | 10 | 11 | 34 | 48 | 26 | 36 | 59 |
| Percentage of DerivativeAssets | 7.3 | 6.8 | 2.0 | 1.8 | 6.6 | 9.2 | 10.3 | 15.0 | 13.0 | 15.2 | 11.6 | 8.7 | 6.9 | 2.6 | 2.9 | 2.8 | 4.0 | 13.1 | 13.2 | 7.2 | 8.6 | 15.1 |
| 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 | 2015-12-31 |
| Value | 8.9 | 6.5 | 2.8 | 6.4 | 3.0 | 1.7 | 1.5 | 4.8 | 0.9 | 3.8 | 2.6 | 3.9 | 2.8 | 3.4 | 1.9 | 3.5 | 2.2 | 3.7 | 3.3 | 1.5 | 4.3 | 2.9 |
| Percentage of DerivativeAssets | 3.2 | 2.0 | 0.6 | 2.2 | 1.1 | 0.4 | 0.7 | 1.8 | 0.4 | 1.9 | 1.1 | 1.7 | 1.1 | 1.2 | 0.7 | 1.0 | 0.7 | 1.4 | 0.9 | 0.4 | 1.0 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 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 | 2013-12-31 |
| Value | 245 | 295 | 441 | 283 | 245 | 362 | 182 | 219 | 173 | 163 | 214 | 200 | 238 | 270 | 260 | 333 | 277 | 215 | 307 | 320 | 368 | 422 | 326 | 359 | 328 | 549 | 349 | 284 | 201 |
| Percentage of DerivativeAssets | 89.4 | 91.2 | 97.4 | 96.1 | 92.2 | 90.4 | 89.0 | 81.7 | 85.7 | 81.5 | 87.3 | 88.9 | 90.9 | 95.5 | 95.2 | 93.8 | 93.6 | 82.4 | 84.0 | 87.4 | 85.8 | 88.5 | 82.3 | 80.0 | 80.0 | 81.3 | 82.6 | 85.1 | 89.7 |
| 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 | 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 | 2013-12-31 |
| Value | 274 | 323 | 453 | 294 | 266 | 401 | 204 | 268 | 202 | 200 | 245 | 273 | 355 | 296 | 262 | 365 | 366 | 428 | 476 | 396 | 448 | 411 | 676 | 423 | 333 | 224 |
| Percentage of DerivativeAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2013-12-31 |
| Value | 274 | 323 | 453 | 294 | 266 | 401 | 204 | 268 | 202 | 200 | 245 | 273 | 355 | 296 | 262 | 365 | 366 | 428 | 476 | 396 | 448 | 411 | 676 | 423 | 333 | 224 |
| Percentage of DerivativeAssets | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 20 | 22 | 9.1 | 5.2 | 17 | 37 | 21 | 44 | 28 | 33 | 28 | 21 | 21 | 9.4 | 11 | 18 | 16 | 42 | 55 | 44 | 56 | 51 | 67 | 86 | 79 | 123 | 69 | 44 | 22 |
| Percentage of DerivativeAssets | 7.3 | 6.8 | 2.0 | 1.8 | 6.6 | 9.2 | 10.3 | 16.5 | 13.8 | 16.6 | 11.7 | 9.4 | 8.0 | 3.3 | 4.1 | 5.2 | 5.6 | 16.2 | 15.1 | 12.2 | 13.1 | 10.9 | 17.0 | 19.2 | 19.2 | 18.2 | 16.5 | 13.2 | 10.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 254 | 301 | 444 | 289 | 248 | 364 | 183 | 224 | 174 | 167 | 216 | 203 | 241 | 273 | 262 | 337 | 279 | 219 | 310 | 321 | 372 | 425 | 329 | 362 | 332 | 553 | 353 | 289 | 201 |
| Percentage of DerivativeAssets | 92.7 | 93.2 | 98.0 | 98.2 | 93.4 | 90.8 | 89.7 | 83.5 | 86.2 | 83.4 | 88.3 | 90.6 | 92.0 | 96.7 | 95.9 | 94.8 | 94.4 | 83.8 | 84.9 | 87.8 | 86.9 | 89.1 | 83.0 | 80.8 | 80.8 | 81.8 | 83.5 | 86.8 | 90.0 |
| 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 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 158 | 157 | 165 | 108 | 117 | 238 | 95 | 199 | 136 | 136 | 162 | 156 | 171 | 131 | 115 | 160 | 135 | 164 | 256 | 198 | 260 | 205 | 224 | 228 | 214 | 255 | 240 | 251 | 224 | 204 | 224 | 154 | 96 | 130 | 168 | 110 | 124 | 130 | 71 | 81 | 69 | 109 |
| Percentage of DerivativeFairValueOfDerivativeAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 158 | 157 | 165 | 108 | 117 | 238 | 95 | 199 | 136 | 136 | 162 | 156 | 171 | 131 | 115 | 160 | 135 | 164 | 256 | 198 | 260 | 205 | 224 | 228 | 214 | 255 |
| Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 148 | 203 | 356 | 213 | 160 | 205 | 121 | 112 | 90 | 85 | 104 | 99 | 129 | 215 | 214 | 282 | 203 | 119 | 152 | 163 | 186 | 234 | 169 | 138 | 171 | 169 | 243 | 247 | 223 | 183 | 179 | 119 | 86 | 112 | 97 | 90 | 86 | 82 | 104 | 109 | 80 | 80 |
| Percentage of DerivativeFairValueOfDerivativeLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 148 | 203 | 356 | 213 | 160 | 205 | 121 | 112 | 90 | 85 | 104 | 99 | 129 | 215 | 214 | 282 | 203 | 119 | 152 | 163 | 186 | 234 | 169 | 138 | 171 | 169 |
| Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 166 | 204 | 271 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 512 | 317 | 260 | 223 |
| Percentage of DerivativeLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2015-12-31 |
| Value | 13 | 11 | 24 | 8.7 | 1.3 | 0.2 | 4.8 | 0.5 | 1.9 | 0.8 | 2.8 | 8.3 | 10 | 38 | 36 | 38 | 22 | 3.3 | 1.2 | 10 | 8.5 | 2.4 |
| Percentage of DerivativeLiabilities | 6.1 | 4.3 | 5.8 | 3.4 | 0.6 | 0.1 | 3.0 | 0.3 | 1.3 | 0.6 | 1.6 | 5.0 | 5.3 | 14.3 | 13.7 | 11.4 | 8.5 | 1.8 | 0.5 | 3.8 | 2.5 | 0.8 |
| 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 | 2015-12-31 |
| Value | 4.8 | 2.9 | 2.8 | 2.8 | 2.1 | 5.8 | 3.7 | 1.5 | 2.3 | 1.8 | 2.5 | 4.5 | 5.4 | 4.6 | 5.3 | 0.6 | 5.3 | 3.7 | 2.8 | 2.0 | 4.7 | 4.2 |
| Percentage of DerivativeLiabilities | 2.2 | 1.1 | 0.7 | 1.1 | 1.0 | 1.8 | 2.3 | 0.8 | 1.6 | 1.4 | 1.4 | 2.7 | 2.6 | 1.7 | 2.0 | 0.2 | 2.0 | 2.1 | 1.1 | 0.7 | 1.4 | 1.5 |
| Period End | 2020-12-31 | 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 | 2013-12-31 |
| Value | 0.1 | 0.0 | 0.6 | 0.5 | 0.0 | 0.6 | 0.4 | 0.9 | 0.0 | 0.1 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.8 | 1.9 | 5.9 | 7.8 |
| Percentage of DerivativeLiabilities | 0.0 | 0.0 | 0.3 | 0.2 | 0.0 | 0.2 | 0.2 | 0.5 | 0.0 | 0.0 | 0.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.2 | 0.6 | 2.3 | 3.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 204 | 255 | 402 | 246 | 202 | 317 | 151 | 184 | 141 | 126 | 170 | 153 | 187 | 227 | 221 | 301 | 236 | 170 | 258 | 265 | 325 | 374 | 277 | 301 | 285 | 505 | 310 | 248 | 186 |
| Percentage of DerivativeLiabilities | 91.8 | 94.6 | 93.5 | 95.5 | 98.4 | 98.1 | 94.7 | 98.9 | 97.1 | 98.0 | 97.0 | 92.3 | 91.8 | 83.8 | 84.3 | 88.2 | 89.4 | 95.6 | 98.5 | 95.4 | 96.0 | 94.8 | 97.7 | 98.3 | 97.9 | 98.7 | 97.8 | 95.5 | 83.3 |
| 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 | 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 | 2013-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 512 | 317 | 260 | 223 |
| Percentage of DerivativeLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2013-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 512 | 317 | 260 | 223 |
| Percentage of DerivativeLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 13 | 11 | 25 | 8.7 | 1.3 | 0.2 | 4.8 | 0.5 | 1.9 | 0.8 | 2.8 | 8.3 | 11 | 39 | 36 | 39 | 22 | 4.2 | 1.2 | 10 | 8.7 | 13 | 2.4 | 3.5 | 5.1 | 4.5 | 5.4 | 9.9 | 35 |
| Percentage of DerivativeLiabilities | 6.1 | 4.3 | 5.8 | 3.4 | 0.6 | 0.1 | 3.0 | 0.3 | 1.3 | 0.6 | 1.6 | 5.0 | 5.6 | 14.5 | 13.7 | 11.6 | 8.6 | 2.4 | 0.5 | 3.8 | 2.6 | 3.5 | 0.8 | 1.1 | 1.7 | 0.9 | 1.7 | 3.8 | 15.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2013-12-31 |
| Value | 209 | 258 | 405 | 249 | 205 | 323 | 154 | 186 | 144 | 128 | 173 | 158 | 192 | 232 | 226 | 301 | 241 | 174 | 261 | 267 | 330 | 381 | 281 | 303 | 286 | 507 | 311 | 250 | 187 |
| Percentage of DerivativeLiabilities | 93.9 | 95.7 | 94.2 | 96.6 | 99.4 | 99.9 | 97.0 | 99.7 | 98.7 | 99.4 | 98.4 | 95.0 | 94.4 | 85.5 | 86.3 | 88.4 | 91.4 | 97.6 | 99.5 | 96.2 | 97.4 | 96.5 | 99.2 | 98.9 | 98.3 | 99.1 | 98.3 | 96.2 | 84.1 |
| 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 | 2014-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 166 | 204 | 271 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 317 |
| Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 38 | 75 | 201 | 114 | 75 | 57 | 47 | 17 | 8.9 | 8.2 | 8.4 | 7.8 | 16 | 101 | 116 | 141 | 86 | 14 | 6.2 | 19 | 28 | 86 | 50 | 44 | 56 | 34 |
| Percentage of DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 109 | 128 | 155 | 99 | 84 | 147 | 74 | 95 | 81 | 76 | 95 | 91 | 113 | 113 | 98 | 141 | 117 | 104 | 146 | 143 | 158 | 147 | 119 | 94 | 114 | 134 |
| Percentage of DerivativeLiabilityNotOffsetPolicyElectionDeduction | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 74 | 67 | 74 | 44 | 45 | 118 | 37 | 74 | 55 | 44 | 72 | 66 | 74 | 56 | 48 | 58 | 60 | 59 | 109 | 115 | 153 | 160 | 114 | 168 | 120 | 147 |
| Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100 |
| Percentage of DerivativeNotionalAmount | 100.0 |
| Period End | 2020-12-31 |
| Value | 150 |
| Percentage of DerivativeNotionalAmount | 150.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 64 | 61 | 58 | 29 | 35 | 36 | 37 | 45 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 58.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2018-12-31 |
| Value | 37 | 47 | 68 | 40 | 29 | 35 | 39 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 68.1 | 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 | 2018-12-31 |
| Value | 140 | 136 | 131 | 64 | 81 | 98 | 99 | 98 | 97 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 131.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 29 | 58 | 71 | 42 | 45 | 110 | 63 | 46 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 71.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 43 | 42 | 41 | 26 | 31 | 28 | 26 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 41.1 | 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 | 2018-12-31 |
| Value | 409 | 414 | 428 | 253 | 320 | 388 | 391 | 382 | 364 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 428.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 503 | 404 | 533 | 349 | 329 | 251 | 289 | 285 | 274 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 533.0 | 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 | 2018-12-31 |
| Value | 74 | 71 | 71 | 35 | 44 | 55 | 57 | 61 | 76 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 71.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 70 | 116 | 153 | 89 | 65 | 59 | 78 | 57 | 81 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 153.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 |
| Value | 29 |
| Percentage of DerivativeNotionalAmount | 29.1 |
| 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 | 2018-12-31 |
| Value | 65 | 69 | 81 | 71 | 79 | 82 | 61 | 64 | 37 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 81.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 38 | 38 | 36 | 28 | 25 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 36.6 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 26 | 32 | 39 | 31 | 27 | 26 | 37 | 33 | 34 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 39.6 | 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 | 2018-12-31 |
| Value | 110 | 76 | 105 | 49 | 60 | 39 | 52 | 49 | 34 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 105.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 47 | 47 | 35 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 35.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 38 | 35 | 31 | 25 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 31.2 | 0.0 |
| Period End | 2021-06-30 |
| Value | 26 |
| Percentage of DerivativeNotionalAmount | 0.0 |
| Period End | 2020-12-31 |
| Value | 26 |
| Percentage of DerivativeNotionalAmount | 26.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2018-12-31 |
| Value | 3.0 | 28 | 29 | 74 | 39 | 49 | 50 | 52 | 50 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 29.5 | 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 | 2018-12-31 |
| Value | 191 | 151 | 151 | 157 | 170 | 156 | 145 | 166 | 138 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 151.5 | 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 | 2018-12-31 |
| Value | 8000 | 8000 | 8000 | 7500 | 7500 | 7500 | 7500 | 6500 | 6000 |
| Percentage of DerivativeNotionalAmount | 0.0 | 0.0 | 8000.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-08-04 |
| Value | 910 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationConsideration | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 |
| Value | 1.4 | 1.3 | 1.3 | 1.4 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 |
| Value | 62 | 55 | 62 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 4428.6 | 4276.9 | 4792.3 |
| Period End | 2020-11-21 |
| Value | 133 |
| Percentage of EquityMethodInvestmentAggregateCost | 100.0 |
| Period End | 2020-11-21 |
| Value | 67 |
| Percentage of EquityMethodInvestmentAggregateCost | 50.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 34 | 33 | 31 | 29 | 40 | 43 | 41 | 41 | 41 | 41 | 85 | 87 |
| Percentage of EquityMethodInvestments | 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 |
| Value | 24 | 54 | 53 |
| Percentage of FinancingReceivableAllowanceForCreditLosses | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 6.3 | 4.9 | 3.9 | 4.8 | 3.7 | 4.5 |
| Percentage of FinancingReceivableAllowanceForCreditLosses | 25.4 | 9.0 | 7.3 | 0.0 | 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 | 18 | 49 | 49 | 35 | 25 | 20 |
| Percentage of FinancingReceivableAllowanceForCreditLosses | 74.6 | 91.0 | 92.7 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 154 | 140 | 135 | 124 |
| Percentage of FinancingReceivableBeforeAllowanceForCreditLossAndFee | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1089 | 1064 | 1044 | 1025 | 995 | 998 | 961 | 1013 | 1053 | 1044 | 1047 | 1044 | 1011 | 1071 | 1042 | 1021 | 1016 | 996 | 958 | 955 | 931 | 910 | 884 | 869 | 834 | 808 | 820 | 797 | 754 | 714 | 672 | 627 | 577 | 562 | 519 | 495 | 473 | 433 | 462 | 489 | 472 | 466 | 441 | 355 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 20 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 148 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths | 100.0 |
| Period End | 2020-12-31 |
| Value | 35 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 61 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour | 100.0 |
| Period End | 2020-12-31 |
| Value | 78 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree | 100.0 |
| Period End | 2020-12-31 |
| Value | 106 |
| Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 1549 | 1456 | 1645 | 1629 | 1622 | 1589 | 1568 | 1506 | 1398 | 1309 | 879 | 844 |
| Percentage of FiniteLivedIntangibleAssetsGross | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 574 | 510 | 536 | 559 | 559 | 541 | 559 | 528 | 457 | 399 | 350 | 331 |
| Percentage of FiniteLivedIntangibleAssetsGross | 37.1 | 35.0 | 32.6 | 34.3 | 34.5 | 34.1 | 35.7 | 35.1 | 32.7 | 30.5 | 39.8 | 39.2 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 561 | 584 | 598 | 600 | 599 | 624 | 630 | 632 | 627 | 629 | 256 | 250 |
| Percentage of FiniteLivedIntangibleAssetsGross | 36.2 | 40.1 | 36.3 | 36.9 | 37.0 | 39.3 | 40.2 | 42.0 | 44.8 | 48.1 | 29.2 | 29.6 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 19 | 19 | 19 | 20 | 27 | 27 | 27 | 33 | 34 | 41 |
| Percentage of FiniteLivedIntangibleAssetsGross | 1.3 | 1.3 | 1.2 | 1.2 | 1.7 | 1.7 | 1.8 | 2.2 | 2.5 | 3.2 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 310 | 281 | 447 | 387 | 371 | 338 | 301 | 264 | 221 | 197 |
| Percentage of FiniteLivedIntangibleAssetsGross | 20.0 | 19.3 | 27.2 | 23.8 | 22.9 | 21.3 | 19.2 | 17.6 | 15.8 | 15.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 30 | 30 | 32 | 33 | 34 | 34 | 36 | 38 | 43 | 41 | 42 | 42 |
| Percentage of FiniteLivedIntangibleAssetsGross | 1.9 | 2.1 | 2.0 | 2.0 | 2.1 | 2.2 | 2.3 | 2.5 | 3.1 | 3.2 | 4.8 | 5.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 53 | 31 | 12 | 28 | 30 | 23 | 12 | 9.6 | 15 | 0.8 | 6.1 | 6.0 |
| Percentage of FiniteLivedIntangibleAssetsGross | 3.5 | 2.1 | 0.7 | 1.7 | 1.9 | 1.5 | 0.8 | 0.6 | 1.1 | 0.1 | 0.7 | 0.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | -3700000.0 | -3000000.0 | -18900000.0 | -8800000.0 |
| Percentage of ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months | 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 | 3030 | 3030 | 3189 | 3191 | 3162 | 3163 |
| Percentage of GoodwillGross | 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 | 464 | 464 | 464 | 464 | 0.0 | 0.0 |
| Percentage of GoodwillImpairedAccumulatedImpairmentLoss | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 |
| Value | 91 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive | 100.0 |
| Period End | 2020-09-30 |
| Value | 29 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive | 100.0 |
| Period End | 2020-09-30 |
| Value | 33 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour | 100.0 |
| Period End | 2020-09-30 |
| Value | 37 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree | 100.0 |
| Period End | 2020-09-30 |
| Value | 45 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo | 100.0 |
| Period End | 2020-09-30 |
| Value | 51 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 51 | 53 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 14 | 12 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths | 28.1 | 24.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 460 | 430 | 390 | 370 | 335 | 265 | 210 | 165 | 210 | 100 | 100 |
| Percentage of LettersOfCreditOutstandingAmount | 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 | 2019-12-31 |
| Value | 180 | 110 |
| Percentage of LettersOfCreditOutstandingAmount | 46.2 | 32.8 |
| 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 4423 | 4207 | 4177 | 4219 | 4276 | 4566 | 4286 | 3957 | 4106 | 4020 | 86 | 82 | 104 | 80 |
| Percentage of LiabilitiesFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 222 | 270 | 430 | 258 | 206 | 323 | 159 | 186 | 145 | 129 | 176 | 263 | 341 | 264 | 178 | 262 | 278 | 339 | 394 | 283 | 306 | 291 | 4423 | 4207 | 4177 | 4219 | 4276 | 4566 | 4286 | 3957 | 4106 | 4020 | 86 | 82 | 104 | 80 |
| Percentage of LiabilitiesFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 620 | 993 | 914 |
| Percentage of LineOfCreditFacilityFairValueOfAmountOutstanding | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 500 | 47 | 35 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 1050 | 1050 | 750 | 750 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 600 | 600 | 500 | 500 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFive | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 500 | 500 | 760 | 783 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFour | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 300 | 600 | 395 | 383 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearThree | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-12-31 | 2020-09-30 |
| Value | 300 | 547 | 547 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearTwo | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-01 | 2019-12-01 | 2019-10-01 | 2018-06-01 | 2018-04-01 | 2018-03-01 |
| Value | 93 | 67 | 162 | 229 | 273 | 88 |
| Percentage of NotesPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-01-01 |
| Value | 289 |
| Percentage of NotesPayable | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2019-12-31 |
| Value | 1101 | 1323 | 1188 | 1230 |
| Percentage of NotesReceivableGross | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 1076 | 1269 | 1135 |
| Percentage of NotesReceivableNet | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 67 | 85 | 53 |
| Percentage of NotesReceivableNet | 6.2 | 6.7 | 4.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 1009 | 1184 | 1081 |
| Percentage of NotesReceivableNet | 93.8 | 93.3 | 95.3 |
| Period End | 2020-12-31 | 2020-09-30 | 2019-12-31 | 2019-09-30 |
| Value | 5.6 | 5.9 | 0.065 | 6.6 |
| Percentage of OperatingLeaseWeightedAverageDiscountRatePercent | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 5.5 | 0.057 |
| Percentage of OperatingLeaseWeightedAverageDiscountRatePercent | 98.2 | 87.7 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 91 | 126 | 180 | 199 | 155 | 153 | 97 | 15 | 17 | 22 |
| Percentage of OtherAssetsMiscellaneous | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 509 | 559 | 802 | 578 | 532 | 651 | 498 | 533 | 494 | 492 | 279 | 264 | 305 | 363 | 356 | 487 | 409 | 281 | 359 | 451 | 501 | 549 | 429 | 453 | 465 | 718 | 484 | 393 | 381 | 391 | 358 | 372 | 378 | 291 | 254 | 258 | 262 | 261 | 273 | 235 | 265 | 277 | 254 | 273 |
| Percentage of OtherLiabilities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 |
| Value | 102 | 108 | 0.9 |
| Percentage of OtherLiabilities | 12.8 | 21.8 | 0.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 |
| Value | 60 | 85 | 86 | 78 | 70 | 76 | 92 | 39 | 36 | 40 |
| Percentage of OtherSundryLiabilities | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 81 | 102 | 101 | 120 | 126 | 83 | 63 | 69 | 56 | 54 | 50 | 27 |
| Percentage of PrepaidExpenseCurrentAndNoncurrent | 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 | 12 | 14 | 19 | 12 | 12 | 16 | 6.3 | 7.3 | 7.3 | 6.2 | 6.3 | 9.1 | 11 | 19 | 6.2 | 0.0 | 0.0 | 0.0 |
| Percentage of RestrictedCash | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 8.5 | 14 | 26 | 34 | 43 | 59 | 73 | 79 | 0.7 | 33 | 12 | 1.8 | 3.4 | 5.1 | 8.8 | 13 | 35 | 0.0 |
| Percentage of RestructuringReserve | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 24 | 32 | 41 | 55 | 71 | 79 | 0.7 | 23 | 3.9 | 1.8 | 3.4 | 5.1 | 8.8 | 13 | 34 | 0.0 |
| Percentage of RestructuringReserve | 95.0 | 95.0 | 95.7 | 92.9 | 97.1 | 99.2 | 100.0 | 70.3 | 30.2 | 100.0 | 100.0 | 100.0 | 100.0 | 98.6 | 96.9 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 1.3 | 1.7 | 1.9 | 4.2 | 2.1 | 0.6 |
| Percentage of RestructuringReserve | 5.0 | 5.0 | 4.3 | 7.1 | 2.9 | 0.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 3636 | 3638 | 3821 | 3589 | 3522 | 3134 | 3296 | 3297 | 3728 | 3497 | 3813 | 4018 | 4011 | 4026 | 4188 | 3947 | 3646 | 3452 | 3749 | 3389 | 3357 | 3326 | 3308 | 3369 | 3490 | 3472 | 3313 | 3465 | 3603 | 3515 | 3270 | 3408 | 3462 | 3319 | 3114 | 3326 | 3103 | 3091 |
| Percentage of SettlementAssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 11 | 15 | 13 | 16 | 22 | 24 | 24 | 30 | 9.2 | 14 | 23 |
| Percentage of SettlementAssetsCurrent | 0.3 | 0.4 | 0.3 | 0.4 | 0.7 | 0.8 | 0.7 | 0.9 | 0.2 | 0.4 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 66 | 52 | 66 | 34 | 52 | 43 |
| Percentage of SettlementAssetsCurrent | 1.8 | 1.4 | 1.9 | 1.1 | 1.6 | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 45 | 48 | 51 | 56 | 60 | 64 | 67 | 70 |
| Percentage of SettlementAssetsCurrent | 1.2 | 1.3 | 1.4 | 1.6 | 1.7 | 2.1 | 2.0 | 2.1 |
| Period End | 2020-09-30 | 2019-12-31 | 2018-12-31 |
| Value | 81 | 52 | 69 |
| Percentage of SettlementAssetsCurrent | 2.3 | 1.6 | 1.8 |
| 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 | 2018-12-31 |
| Value | 1296 | 1272 | 1303 | 1331 | 1333 | 1347 | 1257 | 1232 | 962 |
| Percentage of SettlementAssetsCurrent | 35.6 | 35.0 | 34.1 | 37.1 | 37.9 | 43.0 | 38.2 | 37.4 | 25.2 |
| 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 | 2018-12-31 |
| Value | 150 | 231 | 562 | 712 | 441 | 207 | 276 | 213 | 168 |
| Percentage of SettlementAssetsCurrent | 4.1 | 6.4 | 14.7 | 19.9 | 12.5 | 6.6 | 8.4 | 6.5 | 4.4 |
| Period End | 2020-12-31 | 2018-12-31 |
| Value | 72 | 69 |
| Percentage of SettlementAssetsCurrent | 1.9 | 1.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 66 | 52 | 66 | 34 | 52 | 43 |
| Percentage of SettlementAssetsCurrent | 1.8 | 1.4 | 1.9 | 1.1 | 1.6 | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 |
| Value | 11 | 15 | 13 | 16 | 22 | 24 | 24 | 30 | 9.2 | 14 | 23 |
| Percentage of SettlementAssetsCurrent | 0.3 | 0.4 | 0.3 | 0.4 | 0.7 | 0.8 | 0.7 | 0.9 | 0.2 | 0.4 | 0.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 |
| Value | 45 | 48 | 51 | 56 | 60 | 64 | 67 | 70 |
| Percentage of SettlementAssetsCurrent | 1.2 | 1.3 | 1.4 | 1.6 | 1.7 | 2.1 | 2.0 | 2.1 |
| Period End | 2020-09-30 | 2019-12-31 | 2018-12-31 |
| Value | 81 | 52 | 69 |
| Percentage of SettlementAssetsCurrent | 2.3 | 1.6 | 1.8 |
| 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 | 2018-12-31 |
| Value | 1296 | 1272 | 1303 | 1331 | 1333 | 1347 | 1257 | 1232 | 962 |
| Percentage of SettlementAssetsCurrent | 35.6 | 35.0 | 34.1 | 37.1 | 37.9 | 43.0 | 38.2 | 37.4 | 25.2 |
| 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 | 2018-12-31 |
| Value | 150 | 231 | 562 | 712 | 441 | 207 | 276 | 213 | 168 |
| Percentage of SettlementAssetsCurrent | 4.1 | 6.4 | 14.7 | 19.9 | 12.5 | 6.6 | 8.4 | 6.5 | 4.4 |
| Period End | 2020-12-31 | 2018-12-31 |
| Value | 72 | 69 |
| Percentage of SettlementAssetsCurrent | 1.9 | 1.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2011-12-31 |
| Value | 3636 | 3638 | 3821 | 3589 | 3522 | 3134 | 3296 | 3297 | 3728 | 3497 | 3813 | 4018 | 4011 | 4026 | 4188 | 3947 | 3646 | 3452 | 3749 | 3389 | 3357 | 3326 | 3308 | 3369 | 3490 | 3472 | 3313 | 3465 | 3603 | 3515 | 3270 | 3408 | 3462 | 3319 | 3114 | 3326 | 3103 | 3091 |
| Percentage of SettlementLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 7100000.0 | 7300000.0 | 6900000.0 | 6900000.0 | 7100000.0 | 7100000.0 | 7400000.0 | 7400000.0 | 7600000.0 | 7600000.0 | 6300000.0 | 4800000.0 | 3900000.0 | 2700000.0 | 2200000.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 22.27 | 22.26 | 20.88 | 20.86 | 17.92 | 17.69 | 17.32 | 16.68 | 15.47 | 14.68 | 15.69 | 17.38 | 16.85 | 15.34 | 14.63 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue | 100.0 | 100.0 | 100.0 | 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 | 21 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 3600000.0 | 3800000.0 | 3700000.0 | 3800000.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 18.48 | 18.42 | 18.38 | 18.4 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 15 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | 100.0 |
| Period End | 2020-12-31 |
| Value | 13 |
| Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 632 | 707 | 782600 | 782 | 1000 | 1000 | 1000 |
| Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 29 | 27 | 28 | 28 | 27 | 25 | 27 | 28 | 27 | 24 | 23 | 26 | 25 | 24 | 25 | 20 | 24 | 23 | 22 | 19 | 19 | 16 | 17 | 16 | 16 | 15 | 15 | 15 | 16 | 15 | 17 | 23 | 22 | 20 | 20 | 19 | 19 | 19 | 20 | 60 | 57 | 55 | 52 | 45 |
| Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 329 | 327 | 329 | 283 | 281 | 280 | 283 | 282 | 286 | 284 | 284 | 309 | 309 | 315 | 319 | 328 | 347 | 345 | 343 | 81 | 95 | 101 | 96 | 95 | 91 | 86 | 82 | 93 | 106 | 102 | 108 | 102 | 98 | 94 | 93 | 96 | 97 | 113 | 115 | 650 | 615 | 584 | 555 | 468 |
| Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-12-31 |
| Value | 77 | 16 |
| Percentage of AccruedAgentContractCosts | 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 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 | 2009-12-31 |
| Value | 135 | 96 | 57 | 53 | 58 | 57 | 45 | 41 | 37 | 34 | 25 | 37 |
| Percentage of AmountsAdvancedToAgentsNetOfDiscounts | 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 | 2019-12-31 |
| Value | 1509 | 1564 | 1931 | 2227 | 1862 | 1691 |
| Percentage of AvailableForSaleAndHeldToMaturitySecuritiesAmortizedCost | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2019-12-31 |
| Value | 1568 | 1620 | 2003 | 2298 | 1924 | 1723 |
| Percentage of AvailableForSaleAndHeldToMaturitySecuritiesFairValue | 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 |
| Value | 59 | 57 | 72 | 71 | 62 | 40 | 32 | 35 | 28 | 16 | 6.1 | 2.1 | 4.0 | 3.7 | 8.1 | 13 | 13 | 8.8 | 5.1 | 20 | 23 | 17 | 14 |
| Percentage of Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedgain | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 59 | 56 | 72 | 71 | 62 | 38 | 31 | 35 | 28 | 15 | -1.4 | -12.3 | -6.1 | -7.0 | 4.1 | 9.8 | 8.9 | 0.8 | -6.1 | 19 | 22 | 17 | 12 |
| Percentage of Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedgainloss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 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 | 0.5 | 0.9 | 0.1 | 0.5 | 2.0 | 0.6 | 0.2 | 0.4 | 1.4 | 7.5 | 14 | 10 | 10 | 4.0 | 3.3 | 4.1 | 8.0 | 11 | 1.0 | 0.6 | 0.8 | 2.1 |
| Percentage of Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedloss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 2600000.0 |
| Percentage of DeferredGainLossOnDiscontinuationOfCashFlowHedge | 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 | 2013-12-31 |
| Value | 15 | 13 | 8.5 | 11 | 9.7 | 7.9 | 12 | 14 |
| Percentage of DeferredTaxAssetsGoodwillandIntangibleAssetsandPropertyPlantandEquipment |