| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CommonStockValue | ▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄████████████████████ | 0.8 | 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 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | NA | NA | NA |
| us-gaap:CommonStockSharesOutstanding | ▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▅▆▆▆▆▆▆▇█ | 73.1 | 80.5 | 83.5 | 87.8 | 87.2 | 87.2 | 89.3 | 89.2 | 89.1 | 89.2 | 90.0 | 89.9 | 89.8 | 91.3 | 91.6 | 91.2 | 100.4 | 101.3 | 100.7 | 101.2 | 102.2 | 103.1 | 110.8 | 111.0 | 113.4 | 113.9 | 113.3 | 114.5 | 118.5 | 119.4 | 120.9 | 121.8 | 121.3 | 121.3 | 120.9 | 121.7 | 120.6 | 124.3 | 135.8 | 141.4 | 145.7 | 148.6 | 148.4 | 148.0 | 149.3 | 169.9 |
| us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding | ▁█ | 79.7 | 83.9 | NA | 88.9 | 88.1 | 90.0 | NA | 90.4 | 90.2 | 90.7 | NA | 90.8 | 91.2 | 92.7 | NA | 97.7 | 101.5 | 101.6 | NA | 102.6 | 103.6 | 107.4 | NA | 113.6 | 115.1 | 115.1 | NA | 118.5 | 120.8 | 121.3 | NA | 123.5 | 123.3 | 123.0 | NA | 123.4 | 123.7 | 132.3 | NA | 147.0 | 150.0 | 151.8 | NA | 149.6 | 163.2 | 171.7 |
| us-gaap:WeightedAverageNumberOfSharesOutstandingBasic | ▁█ | 78.9 | 83.1 | NA | 88.3 | 87.9 | 90.0 | NA | 89.9 | 89.9 | 90.5 | NA | 90.4 | 90.7 | 92.1 | NA | 97.3 | 101.2 | 101.1 | NA | 101.9 | 102.9 | 106.7 | NA | 112.4 | 113.8 | 113.6 | NA | 117.0 | 119.1 | 119.5 | NA | 121.5 | 121.4 | 121.0 | NA | 121.2 | 121.7 | 130.3 | NA | 144.4 | 147.4 | 149.1 | NA | 147.5 | 161.9 | 170.7 |
| us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | NA | NA | NA | 1.4 | 2.4 | 3.0 | NA | 2.2 | 2.6 | 2.8 | NA | 2.4 | 2.3 | 1.4 | NA | 3.2 | 3.7 | 3.1 | NA | 3.0 | 3.1 | 2.5 | NA | 0.9 | 0.5 | 0.5 | NA | 0.7 | 0.5 | 0.4 | NA | 0.6 | 0.8 | 0.6 | NA | 0.9 | 1.0 | 0.9 | NA | 0.4 | 0.4 | 0.3 | NA | 0.5 | 4.3 | NA | |
| us-gaap:EarningsPerShareBasic | █▆▅▅▆▁▅▄▄▄▄▅▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 4.88 | 2.88 | 1.7300000000000004 | 2.07 | 3.18 | -2.58 | 1.75 | 1.11 | 1.12 | 1.02 | 1.0300000000000002 | 1.24 | 1.08 | 1.02 | 1.6000000000000005 | 1.0 | 0.87 | 0.97 | 1.1399999999999997 | 1.05 | 1.09 | 0.9 | 0.8800000000000003 | 1.05 | 1.01 | 0.98 | 1.02 | 0.91 | 0.84 | 0.8 | 0.8999999999999999 | 0.76 | 0.74 | 0.69 | 0.69 | 0.67 | 0.65 | 0.56 | 0.5 | 0.49 | 0.49 | 0.47 | 0.43999999999999995 | 0.39 | 0.29 | 0.32 |
| us-gaap:EarningsPerShareDiluted | █▆▅▅▆▁▅▄▄▄▄▅▄▄▅▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 4.83 | 2.85 | 1.71 | 2.05 | 3.18 | -2.58 | 1.7399999999999998 | 1.1 | 1.12 | 1.01 | 1.0299999999999998 | 1.23 | 1.07 | 1.01 | 1.6099999999999999 | 1.0 | 0.86 | 0.97 | 1.1300000000000003 | 1.05 | 1.08 | 0.89 | 0.8800000000000003 | 1.04 | 1.0 | 0.97 | 1.0100000000000002 | 0.9 | 0.83 | 0.78 | 0.8900000000000001 | 0.75 | 0.73 | 0.67 | 0.6799999999999999 | 0.66 | 0.64 | 0.55 | 0.49 | 0.48 | 0.48 | 0.46 | 0.43999999999999995 | 0.38 | 0.29 | 0.32 |
| us-gaap:IncomeLossFromContinuingOperationsPerBasicShare | █▆▅▅▆▁▅▄▄▄▄▅▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 4.88e-06 | 2.88e-06 | 1.7300000000000004e-06 | 2.0699999999999997e-06 | 3.18e-06 | -2.58e-06 | 1.75e-06 | 1.1100000000000002e-06 | 1.12e-06 | 1.02e-06 | 1.0300000000000003e-06 | 1.24e-06 | 1.0700000000000001e-06 | 1.01e-06 | 1.6100000000000003e-06 | 1e-06 | 8.7e-07 | 9.7e-07 | 1.1400000000000005e-06 | 1.06e-06 | 1.0900000000000002e-06 | 9.000000000000001e-07 | 8.900000000000002e-07 | 1.06e-06 | 1.01e-06 | 9.8e-07 | 1.02e-06 | 9.100000000000001e-07 | 8.5e-07 | 8.000000000000001e-07 | 9.100000000000002e-07 | 7.6e-07 | 7.4e-07 | 6.9e-07 | 6.800000000000002e-07 | 6.800000000000001e-07 | 6.5e-07 | 5.6e-07 | 5e-07 | 4.9e-07 | 5e-07 | 4.6999999999999995e-07 | 4.5e-07 | 4.0000000000000003e-07 | 3.1e-07 | 3.4000000000000003e-07 |
| us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare | █▆▅▅▆▁▅▄▄▄▄▅▄▄▅▄▄▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | 4.83e-06 | 2.8500000000000002e-06 | 1.71e-06 | 2.05e-06 | 3.18e-06 | -2.58e-06 | 1.7400000000000003e-06 | 1.1100000000000002e-06 | 1.12e-06 | 1.02e-06 | 1.0299999999999999e-06 | 1.24e-06 | 1.0700000000000001e-06 | 1.01e-06 | 1.5999999999999997e-06 | 1e-06 | 8.6e-07 | 9.7e-07 | 1.14e-06 | 1.0500000000000001e-06 | 1.08e-06 | 9.000000000000001e-07 | 8.799999999999999e-07 | 1.0500000000000001e-06 | 1e-06 | 9.7e-07 | 1.0099999999999999e-06 | 9.000000000000001e-07 | 8.3e-07 | 7.900000000000001e-07 | 8.899999999999996e-07 | 7.5e-07 | 7.3e-07 | 6.800000000000001e-07 | 6.699999999999999e-07 | 6.6e-07 | 6.4e-07 | 5.6e-07 | 5e-07 | 4.8e-07 | 4.9e-07 | 4.6000000000000004e-07 | 4.3999999999999997e-07 | 3.9e-07 | 3.1e-07 | 3.4000000000000003e-07 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cost Ratio us-gaap:ProductOrService an:NewVehicle | █▆▇▅▃▃▆▆▅▄▇▆▆▆█▇▆▆▇▇▇▆▇▇▆▅▆▆▅▄▅▅▄▃▄▃▃▂▃▂▁▂▁▁▁ | 3428.3 | 2982.3 | 3127.0 | 2748.4 | 2261.3 | 2281.9 | 3025.4 | 2874.8 | 2769.6 | 2496.7 | 3066.6 | 2933.1 | 2949.6 | 2802.3 | 3345.3 | 3108.4 | 2930.9 | 2796.2 | 3187.8 | 3195.9 | 3071.9 | 2800.2 | 3144.0 | 3113.6 | 2967.8 | 2769.6 | 2983.1 | 2823.6 | 2736.9 | 2428.6 | 2636.7 | 2561.6 | 2493.6 | 2257.7 | 2476.0 | 2240.5 | 2196.1 | 1994.3 | 2085.6 | 1881.6 | 1746.6 | 1785.1 | 1778.7 | 1773.3 | 1656.6 | NA |
| Cost Ratio us-gaap:ProductOrService an:PartsAndService | █▆▆▆▃▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▁▂▁▁▁▁▁ | 950.8 | 851.0 | 838.4 | 852.8 | 689.9 | 876.3 | 891.3 | 902.6 | 901.5 | 876.7 | 868.0 | 864.0 | 857.1 | 858.5 | 854.1 | 841.6 | 857.5 | 845.1 | 822.5 | 843.8 | 834.7 | 820.4 | 778.3 | 783.3 | 777.8 | 743.4 | 729.3 | 717.4 | 704.8 | 671.0 | 651.1 | 653.8 | 655.9 | 636.6 | 600.0 | 596.8 | 602.5 | 599.9 | 573.1 | 578.0 | 572.0 | 570.0 | 560.2 | 564.1 | 547.3 | NA |
| Cost Ratio us-gaap:ProductOrService an:UsedVehicle | █▆▅▅▄▃▄▄▄▄▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁ | 2222.9 | 1749.1 | 1511.2 | 1516.9 | 1324.5 | 1248.7 | 1344.6 | 1402.9 | 1379.4 | 1339.6 | 1212.4 | 1281.7 | 1298.7 | 1330.5 | 1208.1 | 1228.3 | 1201.1 | 1240.9 | 1217.5 | 1276.8 | 1259.4 | 1241.6 | 1153.8 | 1205.4 | 1216.3 | 1193.2 | 1105.2 | 1148.5 | 1082.3 | 1049.7 | 1016.5 | 1044.7 | 1056.5 | 1009.7 | 912.1 | 936.4 | 947.4 | 918.8 | 882.2 | 911.9 | 887.3 | 831.4 | 788.4 | 812.4 | 783.7 | NA |
| Cost Ratio us-gaap:ProductOrService us-gaap:ProductAndServiceOther | ▁▂▂▁▂▅▅▃█▇▄▅█▆▆▂ | 7.4 | 8.4 | 12.6 | 5.6 | 10.9 | 24.3 | 22.2 | 14.7 | 38.1 | 32.3 | 19.3 | 23.0 | 38.8 | 27.8 | 28.8 | 12.5 | 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 |
| Gross Margin us-gaap:ProductOrService an:NewVehicle | █▆▇▅▃▃▆▆▅▄▇▆▆▆█▇▆▆▇▇▇▆▇▇▆▅▆▆▅▄▅▅▄▃▄▃▃▂▃▂▁▂▁▁▁ | 3428.3 | 2982.3 | 3127.0 | 2748.4 | 2261.3 | 2281.9 | 3025.4 | 2874.8 | 2769.6 | 2496.7 | 3066.6 | 2933.1 | 2949.6 | 2802.3 | 3345.3 | 3108.4 | 2930.9 | 2796.2 | 3187.8 | 3195.9 | 3071.9 | 2800.2 | 3144.0 | 3113.6 | 2967.8 | 2769.6 | 2983.1 | 2823.6 | 2736.9 | 2428.6 | 2636.7 | 2561.6 | 2493.6 | 2257.7 | 2476.0 | 2240.5 | 2196.1 | 1994.3 | 2085.6 | 1881.6 | 1746.6 | 1785.1 | 1778.7 | 1773.3 | 1656.6 | NA |
| Gross Margin us-gaap:ProductOrService an:PartsAndService | █▆▆▆▃▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▁▂▁▁▁▁▁ | 950.8 | 851.0 | 838.4 | 852.8 | 689.9 | 876.3 | 891.3 | 902.6 | 901.5 | 876.7 | 868.0 | 864.0 | 857.1 | 858.5 | 854.1 | 841.6 | 857.5 | 845.1 | 822.5 | 843.8 | 834.7 | 820.4 | 778.3 | 783.3 | 777.8 | 743.4 | 729.3 | 717.4 | 704.8 | 671.0 | 651.1 | 653.8 | 655.9 | 636.6 | 600.0 | 596.8 | 602.5 | 599.9 | 573.1 | 578.0 | 572.0 | 570.0 | 560.2 | 564.1 | 547.3 | NA |
| Gross Margin us-gaap:ProductOrService an:UsedVehicle | █▆▅▅▄▃▄▄▄▄▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁ | 2222.9 | 1749.1 | 1511.2 | 1516.9 | 1324.5 | 1248.7 | 1344.6 | 1402.9 | 1379.4 | 1339.6 | 1212.4 | 1281.7 | 1298.7 | 1330.5 | 1208.1 | 1228.3 | 1201.1 | 1240.9 | 1217.5 | 1276.8 | 1259.4 | 1241.6 | 1153.8 | 1205.4 | 1216.3 | 1193.2 | 1105.2 | 1148.5 | 1082.3 | 1049.7 | 1016.5 | 1044.7 | 1056.5 | 1009.7 | 912.1 | 936.4 | 947.4 | 918.8 | 882.2 | 911.9 | 887.3 | 831.4 | 788.4 | 812.4 | 783.7 | NA |
| Gross Margin us-gaap:ProductOrService us-gaap:ProductAndServiceOther | ▁▂▂▁▂▅▅▃█▇▄▅█▆▆▂ | 7.4 | 8.4 | 12.6 | 5.6 | 10.9 | 24.3 | 22.2 | 14.7 | 38.1 | 32.3 | 19.3 | 23.0 | 38.8 | 27.8 | 28.8 | 12.5 | 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 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TTM Greenblatt ROC _ _ | █▆▆▆▅▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄ | 530.2 | 336.9 | 309.4 | 271.7 | 201.4 | -219.3 | 235.8 | 193.5 | 203.5 | 190.8 | 197.3 | 203.6 | 191.2 | 185.8 | 229.3 | 211.2 | 196.2 | 206.7 | 236.6 | 219.0 | 226.5 | 207.4 | 200.4 | 235.7 | 222.1 | 214.9 | 226.5 | 207.4 | 197.8 | 189.1 | 202.8 | 187.2 | 180.9 | 169.4 | 168.7 | 163.7 | 164.2 | 148.7 | 143.5 | 144.1 | 144.4 | 140.0 | 134.7 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:CostOfRevenue | █▆▆▅▄▄▆▆▅▅▆▆▆▅▆▆▅▅▆▆▆▅▆▆▅▅▅▅▅▄▄▄▄▃▄▃▃▃▃▂▂▂▂▂▂▁ | 5652.1 | 4871.0 | 4798.399999999998 | 4433.4 | 3738.0 | 3853.8 | 4653.3 | 4573.8 | 4453.0 | 4132.6 | 4563.8 | 4493.9 | 4540.2 | 4417.6 | 4816.3 | 4586.5 | 4453.2 | 4319.6 | 4671.4 | 4731.1 | 4599.6 | 4293.7 | 4527.6 | 4523.4 | 4405.2 | 4144.3 | 4264.3 | 4156.1 | 4043.6 | 3656.1 | 3820.7 | 3774.2 | 3730.4 | 3432.4 | 3540.7 | 3311.2 | 3276.5 | 3054.0 | 3099.2 | 2931.3 | 2752.9 | 2744.9 | 2701.7 | 2728.5 | 2575.0 | 2328.2 |
| us-gaap:GainLossOnInvestments | ▁█ | 3.4 | 7.5 | 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 | NA |
| us-gaap:GrossProfit | █▅▅▅▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁ | 1326.3 | 1032.8 | 986.7 | 971.5 | 795.0 | 813.2 | 895.6 | 887.4 | 890.8 | 849.2 | 847.9 | 855.3 | 851.8 | 842.3 | 867.2 | 845.9 | 826.1 | 819.8 | 809.1 | 836.4 | 841.8 | 825.9 | 812.2 | 830.3 | 819.1 | 799.9 | 783.5 | 752.9 | 744.9 | 707.4 | 703.2 | 696.6 | 696.1 | 664.0 | 632.8 | 622.6 | 628.0 | 603.0 | 579.2 | 575.2 | 583.4 | 566.2 | 544.5 | 545.4 | 529.3 | 508.4 |
| us-gaap:IncomeLossFromContinuingOperations | █▆▅▆▇▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄ | 384.9 | 239.5 | 151.5 | 182.6 | 279.9 | -232.2 | 157.7 | 100.0 | 101.0 | 92.1 | 92.9 | 112.3 | 97.4 | 93.3 | 151.5 | 97.6 | 87.7 | 98.2 | 115.6 | 107.8 | 112.1 | 96.2 | 97.8 | 119.0 | 115.2 | 111.7 | 116.9 | 106.7 | 100.7 | 95.5 | 109.7 | 92.8 | 90.1 | 83.2 | 82.9 | 81.9 | 79.0 | 73.5 | 69.9 | 70.7 | 73.3 | 70.3 | 68.1 | 58.5 | 50.0 | 58.8 |
| us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | █▆▅▆▇▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄ | 511.6 | 317.3 | 201.3 | 243.5 | 376.5 | -271.2 | 211.2 | 137.1 | 138.2 | 126.1 | 128.5 | 145.1 | 129.6 | 126.2 | 173.9 | 157.9 | 144.9 | 159.8 | 187.5 | 174.8 | 183.1 | 156.9 | 159.1 | 195.3 | 186.8 | 181.5 | 188.5 | 173.8 | 164.2 | 155.8 | 170.3 | 151.6 | 146.6 | 135.9 | 135.0 | 132.6 | 129.6 | 119.6 | 112.8 | 115.6 | 118.4 | 114.5 | 109.3 | 93.6 | 82.0 | NA |
| us-gaap:IncomeTaxExpenseBenefit | █▆▅▅▇▁▅▄▄▄▄▄▄▄▄▅▅▅▆▅▆▅▅▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▄▅▅▅▄▄▄▄ | 126.7 | 77.8 | 49.8 | 60.9 | 96.6 | -39.0 | 53.5 | 37.1 | 37.2 | 34.0 | 35.6 | 32.8 | 32.2 | 32.9 | 22.4 | 60.3 | 57.2 | 61.6 | 71.9 | 67.0 | 71.0 | 60.7 | 61.3 | 76.3 | 71.6 | 69.8 | 71.6 | 67.1 | 63.5 | 60.3 | 60.6 | 58.8 | 56.5 | 52.7 | 52.1 | 50.7 | 50.6 | 46.1 | 42.9 | 44.9 | 45.1 | 44.2 | 41.2 | 35.1 | 32.0 | 37.8 |
| us-gaap:IncomeTaxesPaidNet | █▁▄▅▁▁▁▂▄▁▂▁▄▄▁▁▆▁▄▃▆▁▃▃▆▂▃▂▆▁▃▃▅▁▂▂▄▁▂▁▄▁▁ | 190.4 | 0.1 | 74.2 | 112.8 | 2.7 | 0.5 | 4.3 | 27.2 | 74.8 | 1.2 | 27.9 | 11.3 | 86.2 | 84.6 | 0.7 | 2.2 | 124.6 | -0.5 | 72.2 | 61.3 | 131.1 | 0.9 | 60.7 | 57.1 | 142.6 | 18.4 | 44.6 | 39.8 | 131.7 | 8.9 | 45.0 | 42.4 | 104.0 | 8.9 | 34.8 | 22.0 | 89.4 | 0.8 | 25.9 | 12.4 | 77.0 | 5.8 | 9.2 | NA | NA | NA |
| us-gaap:InterestExpenseDebt | ▃▄▄▅▄▅▅▆▆▆▇▆▇██▇▇▇▇▇▇▆▆▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▁▂▂▂▁ | 20.9 | 21.2 | 23.4 | 23.6 | 23.2 | 23.5 | 25.1 | 26.1 | 27.7 | 27.8 | 29.0 | 28.4 | 29.7 | 32.3 | 32.2 | 30.0 | 29.2 | 28.8 | 29.6 | 28.9 | 28.7 | 28.3 | 26.5 | 21.4 | 21.6 | 21.4 | 22.1 | 21.7 | 21.3 | 21.6 | 21.7 | 22.3 | 22.0 | 22.3 | 21.7 | 22.2 | 22.5 | 20.5 | 17.4 | 16.4 | 15.9 | 16.3 | 16.3 | 16.1 | 14.7 | NA |
| us-gaap:InterestPaidNet | ▄▁▅▂▃▅▆▅▇▆▇▅█▄▆ | 45.8 | 17.9 | 55.5 | 25.2 | 35.9 | 47.6 | 57.8 | 54.7 | 69.9 | 60.7 | 66.3 | 55.7 | 77.1 | 46.5 | 57.3 | NA | NA | NA | NA | NA | NA | NA | 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 | █▆▅▆▇▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄ | 384.8 | 239.4 | 151.5 | 182.6 | 279.8 | -232.3 | 157.7 | 99.5 | 100.8 | 92.0 | 92.7 | 112.0 | 97.6 | 93.7 | 151.3 | 97.5 | 87.7 | 98.1 | 115.3 | 107.3 | 112.0 | 95.9 | 97.5 | 118.5 | 115.1 | 111.5 | 116.7 | 106.5 | 100.4 | 95.1 | 109.4 | 92.6 | 89.9 | 83.0 | 83.2 | 81.6 | 78.6 | 73.0 | 69.4 | 70.7 | 71.9 | 69.4 | 67.3 | 56.9 | 47.2 | 55.2 |
| us-gaap:OperatingIncomeLoss | █▆▆▆▅▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄ | 530.2 | 336.9 | 309.4 | 271.7 | 201.4 | -219.3 | 235.8 | 193.5 | 203.5 | 190.8 | 197.3 | 203.6 | 191.2 | 185.8 | 229.3 | 211.2 | 196.2 | 206.7 | 236.6 | 219.0 | 226.5 | 207.4 | 200.4 | 235.7 | 222.1 | 214.9 | 226.5 | 207.4 | 197.8 | 189.1 | 202.8 | 187.2 | 180.9 | 169.4 | 168.7 | 163.7 | 164.2 | 148.7 | 143.5 | 144.1 | 144.4 | 140.0 | 134.7 | 120.9 | 126.0 | 115.1 |
| us-gaap:OtherNonoperatingIncomeExpense | ▃▃▁▃█▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃ | 8.9 | 11.0 | -73.8 | 6.4 | 214.5 | -3.0 | 29.4 | 2.6 | -0.3 | 1.9 | -3.1 | 2.3 | 0.2 | 0.8 | 2.9 | 1.6 | 1.8 | 3.0 | 0.3 | 2.6 | 4.2 | -3.4 | 1.4 | -4.3 | 0.5 | 1.1 | -0.6 | 1.1 | 0.9 | 1.5 | 3.4 | -0.7 | 1.3 | 1.6 | 0.5 | 2.5 | -1.4 | 2.0 | -0.3 | -2.4 | 0.5 | 1.7 | 2.6 | -0.7 | -0.3 | -0.1 |
| us-gaap:RealizedInvestmentGainsLosses | NA | 7.5 | 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 | NA | |
| us-gaap:Revenues | █▆▆▅▄▄▆▅▅▅▅▅▅▅▆▅▅▅▅▆▅▅▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁ | 6978.4 | 5903.8 | 5785.1 | 5404.9 | 4533.0 | 4667.0 | 5548.9 | 5461.2 | 5343.8 | 4981.8 | 5411.7 | 5349.2 | 5392.0 | 5259.9 | 5683.5 | 5432.4 | 5279.3 | 5139.4 | 5480.5 | 5567.5 | 5441.4 | 5119.6 | 5339.8 | 5353.7 | 5224.3 | 4944.2 | 5047.8 | 4909.0 | 4788.5 | 4363.5 | 4523.9 | 4470.8 | 4426.5 | 4096.4 | 4173.5 | 3933.8 | 3904.5 | 3657.0 | 3678.4 | 3506.5 | 3336.3 | 3311.1 | 3246.2 | 3273.9 | 3104.3 | 2836.6 |
| us-gaap:SellingGeneralAndAdministrativeExpense | █▆▆▆▄▅▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▂▁▁ | 748.9 | 647.9 | 632.0 | 641.4 | 547.9 | 600.7 | 644.8 | 653.8 | 637.0 | 623.0 | 631.5 | 626.2 | 625.3 | 626.8 | 622.1 | 607.5 | 611.3 | 595.3 | 584.2 | 591.3 | 585.2 | 588.7 | 568.5 | 568.7 | 568.7 | 557.6 | 532.0 | 522.3 | 524.6 | 500.7 | 482.5 | 485.1 | 494.1 | 473.3 | 442.2 | 435.8 | 438.6 | 432.9 | 412.7 | 411.4 | 417.6 | 407.7 | 392.7 | 402.9 | 383.1 | 373.4 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
|---|
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:Assets | ▅▆▇▆▆█▇▇███▇▇▇▇▇▇▇▇▆▆▇▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁ | 8381.0 | 9267.5 | 9887.2 | 9569.3 | 9448.5 | 10552.4 | 10543.3 | 10451.8 | 10699.5 | 10914.3 | 10665.1 | 10119.8 | 10288.6 | 10220.3 | 10271.5 | 9954.8 | 10149.7 | 10092.7 | 10060.0 | 9687.0 | 9788.3 | 9997.6 | 9558.3 | 8851.4 | 8839.4 | 8438.5 | 8399.7 | 7793.7 | 7871.6 | 7744.0 | 7914.1 | 7374.8 | 7453.0 | 7194.2 | 7203.0 | 6563.0 | 6461.4 | 6332.4 | 6198.8 | 5766.8 | 5935.9 | 5889.4 | 5974.2 | NA | NA | NA |
| us-gaap:LiabilitiesAndStockholdersEquity | ▅▆▇▆▆█▇▇███▇▇▇▇▇▇▇▇▆▆▇▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▁▁▁▁ | 8381.0 | 9267.5 | 9887.2 | 9569.3 | 9448.5 | 10552.4 | 10543.3 | 10451.8 | 10699.5 | 10914.3 | 10665.1 | 10119.8 | 10288.6 | 10220.3 | 10271.5 | 9954.8 | 10149.7 | 10092.7 | 10060.0 | 9687.0 | 9788.3 | 9997.6 | 9558.3 | 8851.4 | 8839.4 | 8438.5 | 8399.7 | 7793.7 | 7871.6 | 7744.0 | 7914.1 | 7374.8 | 7453.0 | 7194.2 | 7203.0 | 6563.0 | 6461.4 | 6332.4 | 6198.8 | 5766.8 | 5935.9 | 5889.4 | 5974.2 | NA | NA | NA |
| us-gaap:StockholdersEquity | ▆▇██▇▆▇▇▆▆▆▅▅▅▄▄▅▄▄▄▃▃▄▄▄▄▃▃▃▃▃▃▂▂▂▁▁▁▂▃▃▃▃ | 2856.8 | 3193.9 | 3235.7 | 3357.9 | 3137.7 | 2846.9 | 3162.1 | 2996.7 | 2882.9 | 2785.8 | 2716.0 | 2618.0 | 2500.6 | 2471.9 | 2369.3 | 2200.5 | 2498.6 | 2434.2 | 2310.3 | 2220.8 | 2158.2 | 2090.6 | 2349.3 | 2264.9 | 2285.3 | 2205.6 | 2072.1 | 2012.0 | 2125.1 | 2068.9 | 2061.7 | 1993.4 | 1882.5 | 1786.6 | 1688.5 | 1638.5 | 1528.2 | 1568.1 | 1894.6 | 2024.9 | 2116.1 | 2138.6 | 2078.9 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AssetsCurrent | ▂▅▆▅▄█▇▇▇██▇█▇█▇▇▇█▇▇██▆▆▆▆▅▅▅▅▄▄▄▄▃▃▂▂▁▂▁▂ | 2801.9 | 3666.8 | 4152.7 | 3654.9 | 3520.2 | 4748.6 | 4411.1 | 4398.8 | 4663.6 | 4831.8 | 4884.0 | 4437.8 | 4703.9 | 4646.9 | 4797.5 | 4450.1 | 4646.2 | 4676.8 | 4714.8 | 4421.9 | 4663.9 | 4872.7 | 4711.4 | 4251.6 | 4273.6 | 3985.3 | 3999.2 | 3606.9 | 3728.0 | 3637.7 | 3830.0 | 3358.5 | 3506.5 | 3340.9 | 3361.1 | 2958.3 | 2883.9 | 2781.8 | 2676.2 | 2296.0 | 2489.1 | 2450.8 | 2629.1 | NA | NA | NA |
| us-gaap:CashAndCashEquivalentsAtCarryingValue | ▁▅█▅▄▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▂▁▂▂▂▂▂▃ | 59.5 | 350.0 | 569.6 | 350.5 | 257.3 | 411.0 | 42.0 | 45.0 | 51.1 | 48.7 | 48.6 | 52.6 | 53.1 | 57.5 | 69.2 | 53.3 | 52.5 | 56.3 | 64.8 | 62.2 | 54.7 | 47.8 | 74.1 | 63.9 | 65.3 | 74.1 | 75.4 | 67.5 | 68.5 | 69.2 | 69.2 | 68.3 | 69.7 | 46.3 | 69.7 | 98.6 | 62.1 | 76.3 | 86.6 | 67.3 | 81.8 | 84.3 | 95.1 | 84.5 | 101.6 | 160.6 |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents | ▁▅█▅▄▆▁▁▁▁▁▁▁▁▁▁▁▁▁ | 59.7 | 350.1 | 569.7 | 350.6 | 257.4 | 411.1 | 42.5 | 45.5 | 51.9 | 49.6 | 49.4 | 53.3 | 53.8 | 58.9 | 71.1 | 56.6 | 55.6 | 57.6 | 65.4 | NA | NA | NA | 78.0 | 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:AccountsReceivableNetCurrent | ▆▇▆▄▄▁▇▆▅▅█▅▇▇ | 572.1 | 650.3 | 595.0 | 477.2 | 493.4 | 324.5 | 662.0 | 571.2 | 553.0 | 567.4 | 706.7 | 569.7 | 625.4 | 671.8 | 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 |
| us-gaap:ReceivablesNetCurrent | ▅▆▅▄▄▂▆▅▅▅▇▅▅▆█▆▅▅▇▅▅▅▆▅▅▅▅▃▄▄▄▃▃▃▄▂▂▂▃▁▁▁▂ | 773.5 | 883.5 | 845.2 | 682.5 | 673.3 | 512.9 | 916.7 | 829.5 | 780.8 | 782.7 | 976.2 | 800.5 | 854.5 | 883.1 | 1111.0 | 901.0 | 795.1 | 830.3 | 1032.9 | 788.3 | 817.2 | 767.6 | 908.2 | 758.1 | 770.6 | 778.0 | 817.8 | 651.8 | 691.3 | 663.6 | 740.9 | 599.3 | 621.4 | 590.1 | 698.4 | 514.2 | 538.9 | 518.1 | 587.4 | 402.1 | 404.6 | 425.5 | 462.0 | NA | NA | NA |
| us-gaap:InventoryNet | ▁▃▄▄▃▇▆▆▇█▇▆▇▇▆▆▇▇▇▇▇█▇▆▆▅▅▄▅▄▅▄▄▄▃▃▂▂▂▁▂▁▂ | 1756.2 | 2254.6 | 2598.5 | 2482.5 | 2432.3 | 3677.0 | 3305.8 | 3280.7 | 3517.9 | 3771.4 | 3650.5 | 3381.3 | 3587.0 | 3529.3 | 3365.6 | 3408.6 | 3713.2 | 3692.6 | 3520.1 | 3448.0 | 3661.4 | 3927.8 | 3612.0 | 3226.9 | 3230.7 | 2928.4 | 2899.0 | 2691.4 | 2776.6 | 2712.0 | 2827.2 | 2504.8 | 2625.2 | 2499.8 | 2396.9 | 2142.1 | 2077.7 | 1984.6 | 1809.2 | 1601.7 | 1780.0 | 1731.7 | 1867.0 | NA | NA | NA |
| us-gaap:OtherAssetsCurrent | ▅▄▃▃▃▃▃▆█▅▅▅▅▄▆▁▁▁▁▂▂▂▂▅▅▅▅▄▄▄▄▄▄▅▄▅▅▅▄▅▅▅▅ | 212.7 | 178.7 | 139.4 | 139.4 | 157.3 | 147.7 | 146.6 | 243.6 | 313.8 | 229.0 | 208.7 | 203.4 | 209.3 | 177.0 | 251.7 | 87.2 | 85.4 | 97.6 | 97.0 | 123.4 | 130.6 | 129.5 | 117.1 | 202.7 | 207.0 | 204.8 | 207.0 | 196.2 | 191.6 | 192.9 | 192.7 | 186.1 | 190.2 | 204.7 | 196.1 | 203.4 | 205.2 | 202.8 | 193.0 | 224.9 | 222.7 | 209.3 | 205.0 | NA | NA | NA |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:PropertyPlantAndEquipmentGross | NA | NA | 4791.0 | NA | NA | NA | 4655.8 | NA | NA | NA | 4488.1 | NA | NA | NA | 4173.8 | NA | NA | NA | 3936.4 | NA | NA | NA | 3677.2 | NA | NA | NA | 3352.5 | NA | NA | NA | 3119.0 | NA | NA | NA | 2921.9 | NA | NA | NA | 2707.5 | NA | NA | NA | 2527.6 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType an:FurnitureFixturesAndEquipment | NA | NA | 1040.3 | NA | NA | NA | 973.0 | NA | NA | NA | 807.1 | NA | NA | NA | 720.2 | NA | NA | NA | 659.4 | NA | NA | NA | 642.2 | NA | NA | NA | 578.7 | NA | NA | NA | 569.3 | NA | NA | NA | 545.8 | NA | NA | NA | 518.6 | NA | NA | NA | 479.6 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovements | NA | NA | 2333.3 | NA | NA | NA | 2306.0 | NA | NA | NA | 2320.2 | NA | NA | NA | 2121.1 | NA | NA | NA | 2009.6 | NA | NA | NA | 1856.6 | NA | NA | NA | 1683.4 | NA | NA | NA | 1552.6 | NA | NA | NA | 1451.5 | NA | NA | NA | 1321.8 | NA | NA | NA | 1210.3 | NA | NA | NA | |
| us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:Land | NA | NA | 1417.4 | NA | NA | NA | 1376.8 | NA | NA | NA | 1360.8 | NA | NA | NA | 1332.5 | NA | NA | NA | 1267.4 | NA | NA | NA | 1178.4 | NA | NA | NA | 1090.4 | NA | NA | NA | 997.1 | NA | NA | NA | 924.6 | NA | NA | NA | 867.1 | NA | NA | NA | 837.7 | NA | NA | NA | |
| us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | ███▇▇▇▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁ | 1700.0 | 1700.0 | 1652.9 | 1600.0 | 1600.0 | 1500.0 | 1481.2 | 1400.0 | 1400.0 | 1400.0 | 1332.8 | 1300.0 | 1300.0 | 1200.0 | 1211.1 | 1200.0 | 1200.0 | 1100.0 | 1093.2 | 1100.0 | 1055.9 | 1040.8 | 1009.8 | 981.1 | 985.1 | 951.2 | 930.5 | 942.3 | 925.8 | 901.3 | 883.7 | 879.8 | 870.0 | 853.6 | 826.8 | 813.0 | 792.7 | 773.9 | 756.8 | 738.1 | 723.5 | 708.0 | 689.6 | NA | NA | NA |
| us-gaap:PropertyPlantAndEquipmentNet | ████████████▇▇▇▇▇▇▆▆▆▆▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁ | 3094.7 | 3107.1 | 3138.1 | 3125.1 | 3143.9 | 3164.9 | 3174.6 | 3130.8 | 3115.2 | 3129.6 | 3155.3 | 3085.5 | 3023.1 | 3000.3 | 2962.7 | 2949.2 | 2950.7 | 2897.0 | 2843.2 | 2807.6 | 2772.2 | 2768.1 | 2667.4 | 2494.4 | 2489.2 | 2433.3 | 2422.0 | 2293.4 | 2272.9 | 2244.2 | 2235.3 | 2186.8 | 2122.9 | 2102.4 | 2095.1 | 2007.7 | 1987.0 | 1960.9 | 1950.7 | 1919.2 | 1884.3 | 1880.4 | 1838.0 | NA | NA | NA |
| us-gaap:Goodwill | ▂▂▂▂▂▂▇▇▇██████████▇▆▆▆▅▅▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁ | 1187.0 | 1184.8 | 1185.0 | 1186.5 | 1181.3 | 1183.6 | 1501.9 | 1498.6 | 1497.8 | 1509.8 | 1513.2 | 1516.1 | 1508.1 | 1513.6 | 1515.0 | 1529.8 | 1527.9 | 1515.6 | 1511.3 | 1492.4 | 1427.3 | 1437.4 | 1394.5 | 1346.0 | 1341.0 | 1321.7 | 1314.7 | 1265.3 | 1257.8 | 1257.8 | 1259.6 | 1254.9 | 1253.0 | 1233.0 | 1237.4 | 1172.2 | 1172.2 | 1172.2 | 1172.2 | 1172.2 | 1172.2 | 1171.6 | 1142.1 | NA | NA | NA |
| us-gaap:IntangibleAssetsNetExcludingGoodwill | ▆▆▆▆▆▆▇▇▇███▇██████▇▇▇▅▄▄▄▄▃▃▃▃▃▃▂▃▁▁▁▁▁▁▁▁ | 521.0 | 521.2 | 521.5 | 521.8 | 522.0 | 522.3 | 581.6 | 582.0 | 582.7 | 596.7 | 595.4 | 595.7 | 579.3 | 587.3 | 586.8 | 616.3 | 615.1 | 600.6 | 598.2 | 581.0 | 544.6 | 554.7 | 439.9 | 406.9 | 392.4 | 369.2 | 354.7 | 339.1 | 335.0 | 334.9 | 335.1 | 326.8 | 328.2 | 289.7 | 291.3 | 213.7 | 213.0 | 217.5 | 217.8 | 218.0 | 217.8 | 216.5 | 202.0 | NA | NA | NA |
| us-gaap:OperatingLeaseRightOfUseAsset | ▇▇▇███████▁ | 303.0 | 302.5 | 309.5 | 329.0 | 340.6 | 333.5 | 333.1 | 328.8 | 336.0 | 343.4 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherAssetsNoncurrent | ▅▅▆██▆▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁ | 473.4 | 485.1 | 580.4 | 752.0 | 740.5 | 599.5 | 541.0 | 512.8 | 504.2 | 503.0 | 517.2 | 484.7 | 474.2 | 472.2 | 409.5 | 409.4 | 409.8 | 402.7 | 392.5 | 384.1 | 380.3 | 364.7 | 345.1 | 352.5 | 343.2 | 329.0 | 309.1 | 289.0 | 277.9 | 269.4 | 254.1 | 247.8 | 242.4 | 228.2 | 218.1 | 211.1 | 205.3 | 200.0 | 181.9 | 161.4 | 172.5 | 170.1 | 163.0 | NA | NA | NA |
| us-gaap:EquitySecuritiesFvNi | NA | NA | 101.9 | 288.5 | 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 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:AccountsPayableCurrent | ██▆▆▄▃▅▄▄▄▅▄▄▅▅▄▄▅▅▅▄▅▅▄▄▄▄▃▃▄▄▃▃▂▃▃▂▂▂▁▂▂▁ | 396.1 | 413.2 | 335.2 | 344.5 | 261.3 | 225.5 | 290.3 | 267.6 | 264.8 | 269.2 | 306.2 | 274.4 | 275.1 | 302.2 | 309.8 | 276.6 | 287.5 | 308.6 | 303.7 | 304.0 | 288.4 | 310.5 | 299.9 | 282.4 | 264.4 | 287.9 | 264.7 | 251.1 | 249.4 | 253.3 | 263.0 | 233.4 | 225.7 | 203.3 | 235.8 | 218.2 | 201.6 | 217.2 | 202.4 | 169.0 | 197.7 | 211.9 | 164.0 | NA | NA | NA |
| us-gaap:ContractWithCustomerLiabilityCurrent | █▇▇▆▇█▇▇▆▅▆▆▄▁ | 33.1 | 32.6 | 32.5 | 32.1 | 32.3 | 32.8 | 32.6 | 32.3 | 31.8 | 31.3 | 31.6 | 31.9 | 30.3 | 28.5 | 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 |
| us-gaap:LiabilitiesCurrent | ▃▄▅▄▄▆▆▆▇█▇▆▇▇▇██▇▇▇▇█▆▅▅▄▄▃▃▄▄▃▃▃▃▂▂▂▂▁▁▁▁ | 3040.7 | 3609.2 | 4165.9 | 3710.6 | 3821.3 | 4995.8 | 5100.2 | 5195.0 | 5590.3 | 5898.5 | 5658.1 | 5171.1 | 5476.4 | 5433.6 | 5635.7 | 6128.1 | 6108.5 | 5722.5 | 5829.2 | 5397.9 | 5576.4 | 5860.5 | 5169.1 | 4473.5 | 4395.7 | 3855.6 | 3882.0 | 3542.5 | 3568.9 | 3583.5 | 3751.8 | 3280.4 | 3399.9 | 3207.7 | 3201.7 | 2833.8 | 2715.3 | 2661.8 | 2462.6 | 2159.8 | 2211.5 | 2250.1 | 2399.4 | NA | NA | NA |
| us-gaap:OperatingLeaseLiabilityCurrent us-gaap:BalanceSheetLocation us-gaap:OtherCurrentLiabilities | NA | NA | 38.4 | NA | NA | NA | 41.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| us-gaap:OtherLiabilitiesCurrent | ▅▆▄▄▇▆▇█▇▇▇▇▆▇█▆▅▅▅▅▄▅▄▄▃▄▄▄▃▃▃▂▂▃▂▂▂▂▁▂▁▂▂ | 597.1 | 659.5 | 535.8 | 535.5 | 729.8 | 642.2 | 708.5 | 752.2 | 730.4 | 734.7 | 679.9 | 688.1 | 659.4 | 707.4 | 774.5 | 659.1 | 574.6 | 615.0 | 566.8 | 566.1 | 515.1 | 572.7 | 529.2 | 530.0 | 486.8 | 540.1 | 495.1 | 499.2 | 432.9 | 474.1 | 429.7 | 416.3 | 396.5 | 449.7 | 395.9 | 386.6 | 363.5 | 396.6 | 348.8 | 386.3 | 328.9 | 377.9 | 360.9 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:LongTermDebtAndCapitalLeaseObligations | ▆▆▆▅▅█▄▄▄▄▇▇▇▇▇▂▁▄▄▅▅▅▅▅▆▇█▇▆▆▆▆▆▇█▆▇▆▄▂▃ | 1790.3 | 1791.3 | 1792.6 | 1782.0 | 1783.1 | 2076.4 | 1578.5 | 1575.8 | 1576.2 | 1575.9 | 1926.2 | 1962.1 | 1958.1 | 1958.7 | 1959.2 | 1295.7 | 1216.1 | 1615.8 | 1611.1 | 1769.5 | 1738.0 | 1742.6 | 1753.7 | 1747.8 | 1805.5 | 2030.5 | 2103.4 | 1915.5 | 1865.7 | 1792.0 | 1809.8 | 1826.5 | 1907.2 | 1943.6 | 2066.3 | 1864.1 | 2000.3 | 1887.2 | 1634.4 | 1394.2 | 1433.1 | NA | 1340.6 | NA | NA | NA |
| us-gaap:DeferredIncomeTaxLiabilitiesNet | ▂▂▄▅▆▁█ | 75.4 | 76.3 | 95.9 | 110.1 | 118.0 | 66.5 | 135.1 | NA | NA | NA | 89.8 | NA | NA | NA | 71.9 | NA | NA | NA | 91.5 | NA | NA | NA | 78.6 | NA | NA | NA | 69.3 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:OtherLiabilitiesNoncurrent | █▇▇▇▆▅▅▅▅▅▆▆▆▆▅▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁ | 338.7 | 317.7 | 310.6 | 304.0 | 273.2 | 260.1 | 262.4 | 255.2 | 249.6 | 248.5 | 275.0 | 281.1 | 276.7 | 280.0 | 235.4 | 231.3 | 227.0 | 224.6 | 217.9 | 209.5 | 218.2 | 212.4 | 207.6 | 204.2 | 206.9 | 206.2 | 204.3 | 194.3 | 187.7 | 180.5 | 174.3 | 169.7 | 166.2 | 162.6 | 157.1 | 148.8 | 147.0 | 149.8 | 144.9 | 144.3 | 143.0 | 141.5 | 129.4 | NA | NA | NA |
| us-gaap:OperatingLeaseLiabilityNoncurrent | ▇▇▇███████▁ | 279.1 | 279.1 | 286.5 | 304.7 | 315.2 | 306.7 | 305.0 | 302.5 | 308.8 | 315.0 | 0.0 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | NA | NA | 48.9 | 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 | NA | NA | NA | |
| us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree | NA | NA | 41.7 | 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:LesseeOperatingLeaseLiabilityPaymentsDueYearFour | NA | NA | 35.7 | 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:LesseeOperatingLeaseLiabilityPaymentsDueYearFive | NA | NA | 33.7 | 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:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | NA | NA | 235.6 | 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 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:StockholdersEquity | ▆▇██▇▆▇▇▆▆▆▅▅▅▄▄▅▄▄▄▃▃▄▄▄▄▃▃▃▃▃▃▂▂▂▁▁▁▂▃▃▃▃ | 2856.8 | 3193.9 | 3235.7 | 3357.9 | 3137.7 | 2846.9 | 3162.1 | 2996.7 | 2882.9 | 2785.8 | 2716.0 | 2618.0 | 2500.6 | 2471.9 | 2369.3 | 2200.5 | 2498.6 | 2434.2 | 2310.3 | 2220.8 | 2158.2 | 2090.6 | 2349.3 | 2264.9 | 2285.3 | 2205.6 | 2072.1 | 2012.0 | 2125.1 | 2068.9 | 2061.7 | 1993.4 | 1882.5 | 1786.6 | 1688.5 | 1638.5 | 1528.2 | 1568.1 | 1894.6 | 2024.9 | 2116.1 | 2138.6 | 2078.9 | NA | NA | NA |
| us-gaap:CommonStockValue | ▁▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄████████████████████ | 0.8 | 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 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | NA | NA | NA |
| us-gaap:AdditionalPaidInCapitalCommonStock | ▁▅▆▅▄▃▄▄▃▃▃▃▃▂▁▄▃▂▂▂▂▂▁██▇▆▆▆▅▅▄▄▃▃▃▃▃▃▂▃▂▁ | 5.7 | 41.0 | 53.1 | 41.3 | 29.5 | 18.7 | 35.9 | 34.1 | 25.6 | 24.7 | 20.8 | 19.7 | 18.9 | 16.1 | 4.0 | 30.2 | 27.8 | 17.0 | 18.2 | 18.0 | 17.6 | 15.2 | 5.2 | 78.7 | 73.9 | 66.9 | 61.8 | 55.6 | 53.8 | 43.4 | 42.8 | 38.8 | 34.9 | 28.0 | 26.6 | 24.6 | 27.0 | 20.7 | 19.6 | 18.0 | 18.7 | 11.0 | 2.0 | NA | NA | NA |
| us-gaap:RetainedEarningsAccumulatedDeficit | ▇█▇▇▆▅▆▅▅▄▄▄▃▃▃▅▄▄▄▃▃▃▂▇▇▆▆▆▅▅▅▄▄▃▃▃▃▂▂▂▂▁▁ | 3896.4 | 4308.8 | 4069.4 | 3917.9 | 3735.3 | 3455.5 | 3688.3 | 3530.6 | 3431.1 | 3330.3 | 3238.3 | 3145.6 | 3033.6 | 2936.0 | 2832.2 | 3416.5 | 3319.0 | 3231.3 | 3133.3 | 3018.0 | 2910.7 | 2798.7 | 2702.8 | 4101.7 | 3983.2 | 3868.1 | 3756.6 | 3639.9 | 3533.4 | 3433.0 | 3337.9 | 3228.5 | 3135.9 | 3046.0 | 2963.0 | 2879.8 | 2798.2 | 2719.6 | 2646.6 | 2577.2 | 2506.5 | 2434.6 | 2365.2 | NA | NA | NA |
| us-gaap:TreasuryStockValue | ▄▅▄▂▂▂▂▂▂▂▂▂▂▂▂▅▃▃▃▃▃▃▁█▇▇▇▇▆▆▅▅▅▅▅▅▅▅▃▂▂▁▁ | 1046.1 | 1156.9 | 887.8 | 602.3 | 628.1 | 628.3 | 563.1 | 569.0 | 574.8 | 570.2 | 544.1 | 548.3 | 552.9 | 481.2 | 467.9 | 1247.4 | 849.4 | 815.3 | 842.4 | 816.4 | 771.3 | 724.5 | 359.9 | 1917.1 | 1773.4 | 1731.0 | 1747.9 | 1685.1 | 1463.7 | 1409.1 | 1320.6 | 1275.5 | 1289.9 | 1289.0 | 1302.7 | 1267.5 | 1298.6 | 1173.8 | 773.2 | 571.9 | 410.7 | 308.6 | 289.9 | NA | NA | NA |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | ▁█ | 6.5 | 20.8 | NA | 7.2 | 11.2 | 4.5 | NA | 9.5 | 4.9 | 13.7 | 3.5 | 3.6 | 4.1 | 14.3 | 2.5 | 2.6 | 10.9 | 4.6 | 2.6 | 3.1 | 4.1 | 15.3 | 2.8 | 3.8 | 6.3 | 11.1 | 4.8 | 4.2 | 10.0 | 7.3 | 4.0 | 4.5 | 6.1 | 6.7 | 3.4 | 4.0 | 5.4 | 5.8 | 2.7 | 4.2 | 5.6 | 5.9 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▅▆▂▄█▂▂▃▃▃▁▃▂▃▂▃▂▃▂▃▂▃▂▃▂▃▂▃▁▃▁▃▂▃▁▃▁▂▂▃▁▃▂▂▂▂ | 404.00000000000006 | 526.3 | 43.3 | 270.0 | 780.6 | 113.7 | 103.7 | 240.0 | 165.8 | 259.7 | -24.1 | 244.4 | 92.0 | 198.7 | 83.1 | 218.3 | 53.1 | 185.6 | 37.2 | 250.6 | 30.0 | 198.2 | 31.9 | 233.0 | 42.7 | 199.6 | 32.2 | 242.0 | -4.7 | 215.6 | 15.8 | 189.5 | 43.7 | 235.1 | 4.9 | 192.2 | 19.4 | 100.1 | 65.3 | 186.0 | -28.4 | 153.5 | 54.1 | 65.0 | 63.3 | 69.4 |
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▅██▆▆▅▇▆▆▆▄▅▅▆▆▆▅▅▆▄▆▁▂▅▅▅▃▆▆▆▆▅▅▆▃▆▆▆▆▆▆▅▅▅▆▆ | -79.1 | 70.6 | 77.9 | -26.9 | -32.5 | -92.2 | -2.3 | -16.7 | -48.2 | -48.6 | -123.1 | -89.8 | -69.2 | -13.2 | -22.1 | -48.7 | -81.5 | -76.0 | -32.9 | -130.9 | -15.2 | -310.7 | -256.5 | -62.9 | -110.4 | -79.6 | -226.8 | -53.9 | -53.0 | -42.3 | -46.0 | -80.9 | -91.1 | -39.8 | -184.0 | -39.0 | -50.0 | -24.8 | -31.5 | -46.0 | -40.2 | -88.5 | -66.9 | -90.5 | -21.5 | -21.3 |
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▃▁▇▅▁█▅▅▅▅▇▅▆▅▆▅▆▅▆▅▆▇▇▅▆▅▇▅▆▅▆▅▆▅▇▅▆▆▆▅▆▆▆▆▅▆ | -615.3 | -816.5 | 97.9 | -149.9 | -901.8 | 347.1 | -104.4 | -229.7 | -115.3 | -210.9 | 143.3 | -155.1 | -27.9 | -197.7 | -45.1 | -168.8 | 24.6 | -118.1 | -1.7 | -112.2 | -7.9 | 86.2 | 234.8 | -171.5 | 58.9 | -121.3 | 202.5 | -189.1 | 57.0 | -173.3 | 31.1 | -110.0 | 70.8 | -218.7 | 150.2 | -116.7 | 16.4 | -85.6 | -14.5 | -154.5 | 66.1 | -75.8 | 23.4 | 8.4 | -100.8 | -61.0 |
| us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | ▁▂▆▅▂█▄▄▄▄▄▄▄▄▄▄▄▄ | -290.4 | -219.6 | 219.10000000000005 | 93.2 | -153.7 | 368.6 | -3.0 | -6.4 | 2.3 | 0.2 | -3.9 | -0.5 | -5.1 | -12.2 | 14.5 | 1.0 | -2.0 | -7.8 | 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 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:IncreaseDecreaseInAccountsPayable | ▃█▄█▆▁▅▄▄▂▅▄▃▄▅▄▃▄▄▅▃▄▅▅▃▅▅▄▄▄▅▄▅▃▅▅▃▅▆▃▃▆▃▄▅▅ | -16.6 | 76.8 | -9.8 | 83.0 | 38.6 | -64.1 | 19.4 | 3.3 | -5.1 | -35.2 | 29.8 | -0.8 | -26.8 | -0.5 | 26.1 | -11.2 | -21.1 | 6.7 | -1.9 | 15.8 | -22.2 | 2.5 | 20.9 | 16.6 | -26.4 | 26.6 | 10.5 | 1.6 | -4.0 | -0.6 | 20.5 | 7.7 | 22.4 | -13.9 | 18.0 | 16.2 | -15.9 | 16.8 | 33.4 | -28.4 | -14.2 | 47.6 | -20.3 | 6.2 | 10.4 | 15.5 |
| us-gaap:IncreaseDecreaseInInventories | ▄▅▇▇▁█▆▅▅▇█▆▇▇▇▅▆▇▇▅▅▇█▆█▆▇▆▇▆█▆▇▇▇▇▇▇▇▆▇▆▇▇▇▇ | -506.0 | -343.9 | 123.8 | 45.9 | -1244.6 | 371.3 | 23.1 | -237.8 | -222.7 | 141.4 | 274.6 | -203.8 | 71.0 | 177.7 | 54.8 | -292.7 | 12.8 | 185.8 | 61.3 | -258.1 | -208.8 | 146.5 | 278.3 | -26.2 | 273.7 | 23.0 | 174.0 | -95.8 | 64.6 | -115.5 | 311.4 | -118.2 | 95.1 | 111.8 | 141.8 | 64.4 | 93.1 | 175.4 | 207.5 | -178.3 | 48.3 | -147.6 | 127.1 | 148.5 | 65.4 | 107.6 |
| us-gaap:NetCashProvidedByUsedInOperatingActivities | ▅▆▂▄█▂▂▃▃▃▁▃▂▃▂▃▂▃▂▃▂▃▂▃▂▃▂▃▁▃▁▃▂▃▁▃▁▂▂▃▁▃▂▂▂▂ | 404.00000000000006 | 526.3 | 43.3 | 270.0 | 780.6 | 113.7 | 103.7 | 240.0 | 165.8 | 259.7 | -24.1 | 244.4 | 92.0 | 198.7 | 83.1 | 218.3 | 53.1 | 185.6 | 37.2 | 250.6 | 30.0 | 198.2 | 31.9 | 233.0 | 42.7 | 199.6 | 32.2 | 242.0 | -4.7 | 215.6 | 15.8 | 189.5 | 43.7 | 235.1 | 4.9 | 192.2 | 19.4 | 100.1 | 65.3 | 186.0 | -28.4 | 153.5 | 54.1 | 65.0 | 63.3 | 69.4 |
| us-gaap:NetIncomeLoss | █▆▅▆▇▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄ | 384.8 | 239.4 | 151.5 | 182.6 | 279.8 | -232.3 | 157.7 | 99.5 | 100.8 | 92.0 | 92.7 | 112.0 | 97.6 | 93.7 | 151.3 | 97.5 | 87.7 | 98.1 | 115.3 | 107.3 | 112.0 | 95.9 | 97.5 | 118.5 | 115.1 | 111.5 | 116.7 | 106.5 | 100.4 | 95.1 | 109.4 | 92.6 | 89.9 | 83.0 | 83.2 | 81.6 | 78.6 | 73.0 | 69.4 | 70.7 | 71.9 | 69.4 | 67.3 | 56.9 | 47.2 | 55.2 |
| us-gaap:ShareBasedCompensation | ▃█▃▃▄▂▁▄▂▅▁▁▂▆▁▁▄▂▁▁▂▆▁▂▃▄▂▂▄▃▂▂▂▃▁▂▂▂▁▂▂▂▁▁▂▂ | 6.5 | 20.8 | 7.3 | 7.2 | 11.2 | 4.5 | 3.0 | 9.5 | 4.9 | 13.7 | 3.5 | 3.6 | 4.1 | 14.3 | 2.5 | 2.6 | 10.9 | 4.6 | 2.6 | 3.1 | 4.1 | 15.3 | 2.8 | 3.8 | 6.3 | 11.1 | 4.8 | 4.2 | 10.0 | 7.3 | 4.0 | 4.5 | 6.1 | 6.7 | 3.4 | 4.0 | 5.4 | 5.8 | 2.7 | 4.2 | 5.6 | 5.9 | 2.3 | 3.0 | 4.6 | 6.0 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInInvestingActivities | ▅██▆▆▅▇▆▆▆▄▅▅▆▆▆▅▅▆▄▆▁▂▅▅▅▃▆▆▆▆▅▅▆▃▆▆▆▆▆▆▅▅▅▆▆ | -79.1 | 70.6 | 77.9 | -26.9 | -32.5 | -92.2 | -2.3 | -16.7 | -48.2 | -48.6 | -123.1 | -89.8 | -69.2 | -13.2 | -22.1 | -48.7 | -81.5 | -76.0 | -32.9 | -130.9 | -15.2 | -310.7 | -256.5 | -62.9 | -110.4 | -79.6 | -226.8 | -53.9 | -53.0 | -42.3 | -46.0 | -80.9 | -91.1 | -39.8 | -184.0 | -39.0 | -50.0 | -24.8 | -31.5 | -46.0 | -40.2 | -88.5 | -66.9 | -90.5 | -21.5 | -21.3 |
| us-gaap:PaymentsToAcquirePropertyPlantAndEquipment | ▅▂▂▁▁▂▆▄▄▄█▆██▆▄▅▇▃▅▄▃▄▂▅▄▃▃▃▃▃▂▁▁ | 74.9 | 41.3 | 42.9 | 37.8 | 33.1 | 42.2 | 83.0 | 63.6 | 62.7 | 60.0 | 103.8 | 80.3 | 101.4 | 101.5 | 82.5 | 59.1 | 78.4 | 90.1 | 56.9 | 69.5 | 63.4 | 54.7 | 68.1 | 44.3 | 68.8 | 66.4 | 57.3 | 50.2 | 52.4 | 49.3 | 50.2 | 40.2 | 33.2 | 37.2 | NA | NA | 33.0 | 36.3 | 35.3 | 50.2 | 38.9 | 24.7 | 72.7 | 37.4 | 26.3 | 14.0 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:NetCashProvidedByUsedInFinancingActivities | ▃▁▇▅▁█▅▅▅▅▇▅▆▅▆▅▆▅▆▅▆▇▇▅▆▅▇▅▆▅▆▅▆▅▇▅▆▆▆▅▆▆▆▆▅▆ | -615.3 | -816.5 | 97.9 | -149.9 | -901.8 | 347.1 | -104.4 | -229.7 | -115.3 | -210.9 | 143.3 | -155.1 | -27.9 | -197.7 | -45.1 | -168.8 | 24.6 | -118.1 | -1.7 | -112.2 | -7.9 | 86.2 | 234.8 | -171.5 | 58.9 | -121.3 | 202.5 | -189.1 | 57.0 | -173.3 | 31.1 | -110.0 | 70.8 | -218.7 | 150.2 | -116.7 | 16.4 | -85.6 | -14.5 | -154.5 | 66.1 | -75.8 | 23.4 | 8.4 | -100.8 | -61.0 |
| us-gaap:PaymentsForRepurchaseOfCommonStock | █▄▄▁▁▂▁▁▁▁▁▁▂▁▁▅▁▁▁▁▂▅▁▂▂▁▂▃▂▂▁▁▁▁▁▁▂▅▃▃▂▂▁▂▅▁ | 710.4 | 310.7 | 287.2 | 0.0 | 1.1 | 78.9 | 0.0 | 0.0 | 11.3 | 33.4 | 0.0 | 0.0 | 76.7 | 23.3 | 9.7 | 390.4 | 35.5 | 0.4 | 28.4 | 48.3 | 51.2 | 371.1 | 26.0 | 150.0 | 51.7 | 9.6 | 109.4 | 196.1 | 66.0 | 116.2 | 48.7 | 0.1 | 4.3 | 14.2 | 37.3 | 6.4 | 131.4 | 400.5 | 244.8 | 164.4 | 111.7 | 58.9 | 17.1 | 88.0 | 382.0 | 37.3 |
| 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType an:SeniorNotesatFourPointFivePercentDue2025,us-gaap:SeniorNotes | NA | NA | NA | 4.5e-06 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 4.5e-08 | 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:DebtInstrument,us-gaap:LongtermDebtType an:SeniorNotesatThreePointEightPercentDue2027,us-gaap:SeniorNotes | NA | NA | NA | 3.7999999999999996e-06 | 4e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-08 | 3.7999999999999996e-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 | |
| us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType an:SeniorNotesatThreePointFivePercentDue2024,us-gaap:SeniorNotes | NA | NA | NA | 3.5e-06 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-08 | 3.5e-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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 800000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1900000.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 | 2009-12-31 | 2008-12-31 |
| Value | 73 | 80 | 83 | 87 | 87 | 87 | 89 | 89 | 89 | 89 | 90 | 89 | 89 | 91 | 91 | 91 | 100 | 101 | 100 | 101 | 102 | 103 | 110 | 111 | 113 | 113 | 113 | 114 | 118 | 119 | 120 | 121 | 121 | 121 | 120 | 121 | 120 | 124 | 135 | 141 | 145 | 148 | 148 | 148 | 149 | 169 | 171 | 176 |
| 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 | 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 | 79 | 83 | 88 | 88 | 90 | 90 | 90 | 90 | 90 | 91 | 92 | 97 | 101 | 101 | 102 | 103 | 107 | 113 | 115 | 115 | 118 | 120 | 121 | 123 | 123 | 123 | 123 | 123 | 132 | 147 | 150 | 151 | 149 | 163 | 171 |
| 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 |
| 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 | 78 | 83 | 88 | 87 | 90 | 89 | 89 | 90 | 90 | 90 | 92 | 97 | 101 | 101 | 101 | 102 | 106 | 112 | 113 | 113 | 117 | 119 | 119 | 121 | 121 | 121 | 121 | 121 | 130 | 144 | 147 | 149 | 147 | 161 | 170 |
| 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 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-09-30 | 2010-06-30 |
| Value | 1400000.0 | 2400000.0 | 3000000.0 | 2200000.0 | 2600000.0 | 2800000.0 | 2400000.0 | 2300000.0 | 1400000.0 | 3200000.0 | 3700000.0 | 3100000.0 | 3000000.0 | 3100000.0 | 2500000.0 | 900000.0 | 500000.0 | 500000.0 | 700000.0 | 500000.0 | 400000.0 | 600000.0 | 800000.0 | 600000.0 | 900000.0 | 1000000.0 | 900000.0 | 400000.0 | 400000.0 | 300000.0 | 500000.0 | 4300000.0 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 4.88 | 2.88 | 1.73 | 2.07 | 3.18 | -2.58 | 1.75 | 1.11 | 1.12 | 1.02 | 1.03 | 1.24 | 1.08 | 1.02 | 1.6 | 1.0 | 0.87 | 0.97 | 1.14 | 1.05 | 1.09 | 0.9 | 0.88 | 1.05 | 1.01 | 0.98 | 1.02 | 0.91 | 0.84 | 0.8 | 0.9 | 0.76 | 0.74 | 0.69 | 0.69 | 0.67 | 0.65 | 0.56 | 0.5 | 0.49 | 0.49 | 0.47 | 0.44 | 0.39 | 0.29 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 4.83 | 2.85 | 1.71 | 2.05 | 3.18 | -2.58 | 1.74 | 1.1 | 1.12 | 1.01 | 1.03 | 1.23 | 1.07 | 1.01 | 1.61 | 1.0 | 0.86 | 0.97 | 1.13 | 1.05 | 1.08 | 0.89 | 0.88 | 1.04 | 1.0 | 0.97 | 1.01 | 0.9 | 0.83 | 0.78 | 0.89 | 0.75 | 0.73 | 0.67 | 0.68 | 0.66 | 0.64 | 0.55 | 0.49 | 0.48 | 0.48 | 0.46 | 0.44 | 0.38 | 0.29 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 4.88 | 2.88 | 1.73 | 2.07 | 3.18 | -2.58 | 1.75 | 1.11 | 1.12 | 1.02 | 1.03 | 1.24 | 1.07 | 1.01 | 1.61 | 1.0 | 0.87 | 0.97 | 1.14 | 1.06 | 1.09 | 0.9 | 0.89 | 1.06 | 1.01 | 0.98 | 1.02 | 0.91 | 0.85 | 0.8 | 0.91 | 0.76 | 0.74 | 0.69 | 0.68 | 0.68 | 0.65 | 0.56 | 0.5 | 0.49 | 0.5 | 0.47 | 0.45 | 0.4 | 0.31 | 0.34 |
| Percentage of IncomeLossFromContinuingOperationsPerBasicShare | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 4.83 | 2.85 | 1.71 | 2.05 | 3.18 | -2.58 | 1.74 | 1.11 | 1.12 | 1.02 | 1.03 | 1.24 | 1.07 | 1.01 | 1.6 | 1.0 | 0.86 | 0.97 | 1.14 | 1.05 | 1.08 | 0.9 | 0.88 | 1.05 | 1.0 | 0.97 | 1.01 | 0.9 | 0.83 | 0.79 | 0.89 | 0.75 | 0.73 | 0.68 | 0.67 | 0.66 | 0.64 | 0.56 | 0.5 | 0.48 | 0.49 | 0.46 | 0.44 | 0.39 | 0.31 | 0.34 |
| Percentage of IncomeLossFromContinuingOperationsPerDilutedShare | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 5652 | 4871 | 4798 | 4433 | 3738 | 3853 | 4653 | 4573 | 4453 | 4132 | 4563 | 4493 | 4540 | 4417 | 4816 | 4586 | 4453 | 4319 | 4671 | 4731 | 4599 | 4293 | 4527 | 4523 | 4405 | 4144 | 4264 | 4156 | 4043 | 3656 | 3820 | 3774 | 3730 | 3432 | 3540 | 3311 | 3276 | 3054 | 3099 | 2931 | 2752 | 2744 | 2701 | 2728 | 2575 | 2328 |
| Percentage of CostOfRevenue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 81.0 | 82.5 | 82.9 | 82.0 | 82.5 | 82.6 | 83.9 | 83.8 | 83.3 | 83.0 | 84.3 | 84.0 | 84.2 | 84.0 | 84.7 | 84.4 | 84.4 | 84.0 | 85.2 | 85.0 | 84.5 | 83.9 | 84.8 | 84.5 | 84.3 | 83.8 | 84.5 | 84.7 | 84.4 | 83.8 | 84.5 | 84.4 | 84.3 | 83.8 | 84.8 | 84.2 | 83.9 | 83.5 | 84.3 | 83.6 | 82.5 | 82.9 | 83.2 | 83.3 | 82.9 | 82.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 3107 | 2792 | 2926 | 2581 | 2141 | 2185 | 2887 | 2755 | 2644 | 2374 | 2930 | 2807 | 2824 | 2672 | 3184 | 2963 | 2792 | 2651 | 3022 | 3037 | 2909 | 2651 | 2969 | 2942 | 2801 | 2608 | 2797 | 2666 | 2575 | 2282 | 2466 | 2406 | 2344 | 2116 | 2320 | 2095 | 2050 | 1860 | 1938 | 1743 | 1609 | 1659 | 1651 | 1661 | 1547 |
| Percentage of CostOfRevenue | 55.0 | 57.3 | 61.0 | 58.2 | 57.3 | 56.7 | 62.1 | 60.3 | 59.4 | 57.5 | 64.2 | 62.5 | 62.2 | 60.5 | 66.1 | 64.6 | 62.7 | 61.4 | 64.7 | 64.2 | 63.2 | 61.7 | 65.6 | 65.1 | 63.6 | 62.9 | 65.6 | 64.2 | 63.7 | 62.4 | 64.6 | 63.8 | 62.8 | 61.6 | 65.5 | 63.3 | 62.6 | 60.9 | 62.5 | 59.5 | 58.5 | 60.5 | 61.1 | 60.9 | 60.1 |
| Percentage of Revenues | 44.5 | 47.3 | 50.6 | 47.8 | 47.2 | 46.8 | 52.0 | 50.5 | 49.5 | 47.7 | 54.1 | 52.5 | 52.4 | 50.8 | 56.0 | 54.6 | 52.9 | 51.6 | 55.1 | 54.6 | 53.5 | 51.8 | 55.6 | 55.0 | 53.6 | 52.8 | 55.4 | 54.3 | 53.8 | 52.3 | 54.5 | 53.8 | 53.0 | 51.7 | 55.6 | 53.3 | 52.5 | 50.9 | 52.7 | 49.7 | 48.3 | 50.1 | 50.9 | 50.7 | 49.9 |
| Percentage of Revenues an:NewVehicle | 90.7 | 93.6 | 0.0 | 93.9 | 94.7 | 95.8 | 0.0 | 95.9 | 95.5 | 95.1 | 0.0 | 95.7 | 95.8 | 95.4 | 0.0 | 95.3 | 95.3 | 94.8 | 0.0 | 95.0 | 94.7 | 94.7 | 0.0 | 94.5 | 94.4 | 94.2 | 0.0 | 94.4 | 94.1 | 94.0 | 0.0 | 93.9 | 94.0 | 93.7 | 0.0 | 93.5 | 93.4 | 93.3 | 0.0 | 92.7 | 92.2 | 93.0 | 0.0 | 93.7 | 93.4 |
| 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 |
| Value | 518 | 462 | 453 | 477 | 378 | 487 | 488 | 493 | 489 | 477 | 476 | 473 | 469 | 473 | 479 | 474 | 479 | 474 | 467 | 480 | 473 | 465 | 439 | 441 | 440 | 423 | 423 | 413 | 404 | 384 | 374 | 376 | 375 | 364 | 347 | 345 | 349 | 349 | 334 | 336 | 326 | 325 | 318 | 318 | 308 |
| Percentage of CostOfRevenue | 9.2 | 9.5 | 9.4 | 10.8 | 10.1 | 12.6 | 10.5 | 10.8 | 11.0 | 11.6 | 10.4 | 10.5 | 10.3 | 10.7 | 10.0 | 10.3 | 10.8 | 11.0 | 10.0 | 10.1 | 10.3 | 10.8 | 9.7 | 9.8 | 10.0 | 10.2 | 9.9 | 10.0 | 10.0 | 10.5 | 9.8 | 10.0 | 10.1 | 10.6 | 9.8 | 10.4 | 10.7 | 11.5 | 10.8 | 11.5 | 11.9 | 11.9 | 11.8 | 11.7 | 12.0 |
| Percentage of Revenues | 7.4 | 7.8 | 7.8 | 8.8 | 8.3 | 10.4 | 8.8 | 9.0 | 9.2 | 9.6 | 8.8 | 8.8 | 8.7 | 9.0 | 8.4 | 8.7 | 9.1 | 9.2 | 8.5 | 8.6 | 8.7 | 9.1 | 8.2 | 8.2 | 8.4 | 8.6 | 8.4 | 8.4 | 8.4 | 8.8 | 8.3 | 8.4 | 8.5 | 8.9 | 8.3 | 8.8 | 8.9 | 9.6 | 9.1 | 9.6 | 9.8 | 9.8 | 9.8 | 9.7 | 9.9 |
| Percentage of Revenues an:PartsAndService | 54.5 | 54.3 | 0.0 | 56.0 | 54.9 | 55.6 | 0.0 | 54.7 | 54.3 | 54.5 | 0.0 | 54.8 | 54.8 | 55.1 | 0.0 | 56.3 | 56.0 | 56.1 | 0.0 | 56.9 | 56.7 | 56.8 | 0.0 | 56.3 | 56.6 | 57.0 | 0.0 | 57.7 | 57.3 | 57.3 | 0.0 | 57.6 | 57.3 | 57.2 | 0.0 | 57.8 | 57.9 | 58.3 | 0.0 | 58.1 | 57.1 | 57.1 | 0.0 | 56.5 | 56.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 2020 | 1608 | 1407 | 1370 | 1207 | 1157 | 1256 | 1310 | 1282 | 1249 | 1138 | 1190 | 1207 | 1244 | 1130 | 1142 | 1126 | 1163 | 1152 | 1199 | 1175 | 1150 | 1078 | 1122 | 1125 | 1089 | 1016 | 1060 | 993 | 955 | 937 | 964 | 972 | 923 | 843 | 863 | 870 | 837 | 820 | 845 | 808 | 753 | 726 | 743 | 714 |
| Percentage of CostOfRevenue | 35.7 | 33.0 | 29.3 | 30.9 | 32.3 | 30.0 | 27.0 | 28.7 | 28.8 | 30.2 | 25.0 | 26.5 | 26.6 | 28.2 | 23.5 | 24.9 | 25.3 | 26.9 | 24.7 | 25.4 | 25.6 | 26.8 | 23.8 | 24.8 | 25.5 | 26.3 | 23.8 | 25.5 | 24.6 | 26.1 | 24.5 | 25.5 | 26.1 | 26.9 | 23.8 | 26.1 | 26.6 | 27.4 | 26.5 | 28.8 | 29.4 | 27.4 | 26.9 | 27.2 | 27.7 |
| Percentage of Revenues | 28.9 | 27.3 | 24.3 | 25.3 | 26.6 | 24.8 | 22.6 | 24.0 | 24.0 | 25.1 | 21.0 | 22.3 | 22.4 | 23.7 | 19.9 | 21.0 | 21.3 | 22.6 | 21.0 | 21.5 | 21.6 | 22.5 | 20.2 | 21.0 | 21.5 | 22.0 | 20.1 | 21.6 | 20.7 | 21.9 | 20.7 | 21.6 | 22.0 | 22.5 | 20.2 | 22.0 | 22.3 | 22.9 | 22.3 | 24.1 | 24.2 | 22.8 | 22.4 | 22.7 | 23.0 |
| Percentage of Revenues an:UsedVehicle | 90.9 | 92.0 | 0.0 | 90.3 | 91.2 | 92.7 | 0.0 | 93.4 | 93.0 | 93.2 | 0.0 | 92.9 | 93.0 | 93.6 | 0.0 | 93.0 | 93.8 | 93.8 | 0.0 | 94.0 | 93.3 | 92.7 | 0.0 | 93.1 | 92.5 | 91.3 | 0.0 | 92.3 | 91.7 | 91.0 | 0.0 | 92.3 | 92.0 | 91.5 | 0.0 | 92.2 | 91.9 | 91.2 | 0.0 | 92.7 | 91.1 | 90.6 | 0.0 | 91.5 | 91.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 5.8 | 7.8 | 12 | 4.6 | 10 | 23 | 20 | 13 | 36 | 30 | 18 | 22 | 38 | 27 | 22 | 6.1 |
| Percentage of CostOfRevenue | 0.1 | 0.2 | 0.3 | 0.1 | 0.3 | 0.6 | 0.4 | 0.3 | 0.8 | 0.7 | 0.4 | 0.5 | 0.8 | 0.6 | 0.5 | 0.1 |
| Percentage of Revenues | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.5 | 0.4 | 0.3 | 0.7 | 0.6 | 0.3 | 0.4 | 0.7 | 0.5 | 0.4 | 0.1 |
| Percentage of Revenues us-gaap:ProductAndServiceOther | 78.4 | 92.9 | 0.0 | 82.1 | 94.5 | 95.1 | 0.0 | 93.2 | 96.3 | 95.7 | 0.0 | 96.1 | 98.2 | 98.2 | 0.0 | 48.8 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 3.4 | 7.5 |
| Percentage of GainLossOnInvestments | 100.0 | 100.0 |
| Percentage of Revenues | 0.0 | 0.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 1326 | 1032 | 986 | 971 | 795 | 813 | 895 | 887 | 890 | 849 | 847 | 855 | 851 | 842 | 867 | 845 | 826 | 819 | 809 | 836 | 841 | 825 | 812 | 830 | 819 | 799 | 783 | 752 | 744 | 707 | 703 | 696 | 696 | 664 | 632 | 622 | 628 | 603 | 579 | 575 | 583 | 566 | 544 | 545 | 529 | 508 |
| Percentage of GrossProfit | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 19.0 | 17.5 | 17.1 | 18.0 | 17.5 | 17.4 | 16.1 | 16.2 | 16.7 | 17.0 | 15.7 | 16.0 | 15.8 | 16.0 | 15.3 | 15.6 | 15.6 | 16.0 | 14.8 | 15.0 | 15.5 | 16.1 | 15.2 | 15.5 | 15.7 | 16.2 | 15.5 | 15.3 | 15.6 | 16.2 | 15.5 | 15.6 | 15.7 | 16.2 | 15.2 | 15.8 | 16.1 | 16.5 | 15.7 | 16.4 | 17.5 | 17.1 | 16.8 | 16.7 | 17.1 | 17.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 369 | 313 | 295 | 281 | 246 | 235 | 265 | 266 | 255 | 236 | 245 | 247 | 247 | 240 | 247 | 241 | 228 | 221 | 216 | 229 | 225 | 223 | 216 | 227 | 217 | 207 | 196 | 196 | 185 | 172 | 169 | 174 | 173 | 155 | 148 | 147 | 145 | 130 | 124 | 121 | 117 | 110 | 107 | 111 | 104 |
| Percentage of GrossProfit | 27.8 | 30.3 | 30.0 | 28.9 | 31.0 | 29.0 | 29.6 | 30.0 | 28.6 | 27.8 | 28.9 | 28.9 | 29.1 | 28.6 | 28.5 | 28.6 | 27.7 | 27.0 | 26.8 | 27.5 | 26.8 | 27.0 | 26.6 | 27.4 | 26.6 | 26.0 | 25.1 | 26.1 | 24.9 | 24.4 | 24.1 | 25.1 | 25.0 | 23.4 | 23.5 | 23.6 | 23.1 | 21.6 | 21.6 | 21.2 | 20.1 | 19.6 | 19.7 | 20.5 | 19.8 |
| Percentage of Revenues | 5.3 | 5.3 | 5.1 | 5.2 | 5.4 | 5.1 | 4.8 | 4.9 | 4.8 | 4.7 | 4.5 | 4.6 | 4.6 | 4.6 | 4.3 | 4.4 | 4.3 | 4.3 | 4.0 | 4.1 | 4.1 | 4.4 | 4.1 | 4.2 | 4.2 | 4.2 | 3.9 | 4.0 | 3.9 | 4.0 | 3.7 | 3.9 | 3.9 | 3.8 | 3.6 | 3.7 | 3.7 | 3.6 | 3.4 | 3.5 | 3.5 | 3.3 | 3.3 | 3.4 | 3.4 |
| Percentage of Revenues an:FinanceAndInsuranceNet | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 320 | 190 | 200 | 167 | 119 | 96 | 137 | 118 | 125 | 121 | 136 | 125 | 124 | 129 | 161 | 144 | 138 | 144 | 165 | 158 | 162 | 149 | 174 | 170 | 166 | 161 | 185 | 157 | 161 | 145 | 170 | 155 | 149 | 141 | 155 | 144 | 145 | 134 | 147 | 138 | 136 | 125 | 127 | 111 | 108 |
| Percentage of GrossProfit | 24.2 | 18.4 | 20.4 | 17.2 | 15.0 | 11.9 | 15.4 | 13.4 | 14.1 | 14.4 | 16.1 | 14.7 | 14.7 | 15.4 | 18.6 | 17.1 | 16.7 | 17.6 | 20.5 | 18.9 | 19.3 | 18.1 | 21.5 | 20.6 | 20.3 | 20.2 | 23.7 | 20.9 | 21.7 | 20.6 | 24.2 | 22.3 | 21.4 | 21.3 | 24.5 | 23.2 | 23.2 | 22.2 | 25.5 | 24.0 | 23.4 | 22.1 | 23.4 | 20.5 | 20.6 |
| Percentage of Revenues | 4.6 | 3.2 | 3.5 | 3.1 | 2.6 | 2.1 | 2.5 | 2.2 | 2.3 | 2.4 | 2.5 | 2.3 | 2.3 | 2.5 | 2.8 | 2.7 | 2.6 | 2.8 | 3.0 | 2.8 | 3.0 | 2.9 | 3.3 | 3.2 | 3.2 | 3.3 | 3.7 | 3.2 | 3.4 | 3.3 | 3.8 | 3.5 | 3.4 | 3.5 | 3.7 | 3.7 | 3.7 | 3.7 | 4.0 | 3.9 | 4.1 | 3.8 | 3.9 | 3.4 | 3.5 |
| Percentage of Revenues an:NewVehicle | 9.3 | 6.4 | 0.0 | 6.1 | 5.3 | 4.2 | 0.0 | 4.1 | 4.5 | 4.9 | 0.0 | 4.3 | 4.2 | 4.6 | 0.0 | 4.7 | 4.7 | 5.2 | 0.0 | 5.0 | 5.3 | 5.3 | 0.0 | 5.5 | 5.6 | 5.8 | 0.0 | 5.6 | 5.9 | 6.0 | 0.0 | 6.1 | 6.0 | 6.3 | 0.0 | 6.5 | 6.6 | 6.7 | 0.0 | 7.3 | 7.8 | 7.0 | 0.0 | 6.3 | 6.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 432 | 389 | 385 | 375 | 311 | 388 | 402 | 409 | 411 | 398 | 391 | 390 | 387 | 385 | 374 | 367 | 377 | 371 | 354 | 363 | 361 | 354 | 338 | 342 | 337 | 320 | 305 | 303 | 300 | 286 | 276 | 277 | 280 | 272 | 252 | 251 | 253 | 250 | 238 | 241 | 245 | 244 | 241 | 245 | 239 |
| Percentage of GrossProfit | 32.6 | 37.7 | 39.1 | 38.6 | 39.2 | 47.8 | 45.0 | 46.1 | 46.2 | 47.0 | 46.2 | 45.7 | 45.5 | 45.8 | 43.2 | 43.4 | 45.7 | 45.3 | 43.8 | 43.5 | 43.0 | 42.9 | 41.7 | 41.2 | 41.2 | 40.0 | 39.0 | 40.3 | 40.4 | 40.5 | 39.3 | 39.8 | 40.3 | 41.0 | 39.9 | 40.4 | 40.4 | 41.5 | 41.2 | 42.1 | 42.0 | 43.2 | 44.4 | 45.0 | 45.2 |
| Percentage of Revenues | 6.2 | 6.6 | 6.7 | 6.9 | 6.9 | 8.3 | 7.3 | 7.5 | 7.7 | 8.0 | 7.2 | 7.3 | 7.2 | 7.3 | 6.6 | 6.8 | 7.2 | 7.2 | 6.5 | 6.5 | 6.6 | 6.9 | 6.3 | 6.4 | 6.5 | 6.5 | 6.1 | 6.2 | 6.3 | 6.6 | 6.1 | 6.2 | 6.3 | 6.6 | 6.1 | 6.4 | 6.5 | 6.8 | 6.5 | 6.9 | 7.3 | 7.4 | 7.4 | 7.5 | 7.7 |
| Percentage of Revenues an:PartsAndService | 45.5 | 45.7 | 0.0 | 44.0 | 45.1 | 44.4 | 0.0 | 45.3 | 45.7 | 45.5 | 0.0 | 45.2 | 45.2 | 44.9 | 0.0 | 43.7 | 44.0 | 43.9 | 0.0 | 43.1 | 43.3 | 43.2 | 0.0 | 43.7 | 43.4 | 43.0 | 0.0 | 42.3 | 42.7 | 42.7 | 0.0 | 42.4 | 42.7 | 42.8 | 0.0 | 42.2 | 42.1 | 41.7 | 0.0 | 41.9 | 42.9 | 42.9 | 0.0 | 43.5 | 43.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 202 | 140 | 104 | 146 | 117 | 91 | 88 | 92 | 96 | 90 | 73 | 91 | 91 | 85 | 78 | 85 | 74 | 77 | 65 | 77 | 84 | 91 | 75 | 83 | 91 | 103 | 88 | 88 | 89 | 94 | 79 | 80 | 84 | 86 | 68 | 72 | 77 | 81 | 61 | 66 | 78 | 78 | 61 | 69 | 69 |
| Percentage of GrossProfit | 15.3 | 13.6 | 10.6 | 15.1 | 14.7 | 11.2 | 9.9 | 10.4 | 10.9 | 10.7 | 8.7 | 10.6 | 10.7 | 10.2 | 9.0 | 10.1 | 9.0 | 9.4 | 8.1 | 9.2 | 10.0 | 11.0 | 9.3 | 10.0 | 11.1 | 13.0 | 11.3 | 11.7 | 12.0 | 13.3 | 11.2 | 11.6 | 12.1 | 13.0 | 10.8 | 11.7 | 12.3 | 13.4 | 10.6 | 11.6 | 13.5 | 13.8 | 11.3 | 12.7 | 13.1 |
| Percentage of Revenues | 2.9 | 2.4 | 1.8 | 2.7 | 2.6 | 1.9 | 1.6 | 1.7 | 1.8 | 1.8 | 1.4 | 1.7 | 1.7 | 1.6 | 1.4 | 1.6 | 1.4 | 1.5 | 1.2 | 1.4 | 1.5 | 1.8 | 1.4 | 1.6 | 1.7 | 2.1 | 1.8 | 1.8 | 1.9 | 2.2 | 1.7 | 1.8 | 1.9 | 2.1 | 1.6 | 1.8 | 2.0 | 2.2 | 1.7 | 1.9 | 2.4 | 2.4 | 1.9 | 2.1 | 2.2 |
| Percentage of Revenues an:UsedVehicle | 9.1 | 8.0 | 0.0 | 9.7 | 8.8 | 7.3 | 0.0 | 6.6 | 7.0 | 6.8 | 0.0 | 7.1 | 7.0 | 6.4 | 0.0 | 7.0 | 6.2 | 6.2 | 0.0 | 6.0 | 6.7 | 7.3 | 0.0 | 6.9 | 7.5 | 8.7 | 0.0 | 7.7 | 8.3 | 9.0 | 0.0 | 7.7 | 8.0 | 8.5 | 0.0 | 7.8 | 8.1 | 8.8 | 0.0 | 7.3 | 8.9 | 9.4 | 0.0 | 8.5 | 8.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 |
| Value | 1.6 | 0.6 | 0.4 | 1.0 | 0.6 | 1.2 | 1.4 | 1.0 | 1.4 | 1.4 | 0.7 | 0.9 | 0.7 | 0.5 | 6.2 | 6.4 |
| Percentage of GrossProfit | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.7 | 0.8 |
| Percentage of Revenues | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 |
| Percentage of Revenues us-gaap:ProductAndServiceOther | 21.6 | 7.1 | 0.0 | 17.9 | 5.5 | 4.9 | 0.0 | 6.8 | 3.7 | 4.3 | 0.0 | 3.9 | 1.8 | 1.8 | 0.0 | 51.2 |
| 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 | 384 | 239 | 151 | 182 | 279 | -232.2 | 157 | 100 | 101 | 92 | 92 | 112 | 97 | 93 | 151 | 97 | 87 | 98 | 115 | 107 | 112 | 96 | 97 | 119 | 115 | 111 | 116 | 106 | 100 | 95 | 109 | 92 | 90 | 83 | 82 | 81 | 79 | 73 | 69 | 70 | 73 | 70 | 68 | 58 | 50 | 58 |
| Percentage of IncomeLossFromContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 4.1 | 2.6 | 3.4 | 6.2 | -5.0 | 2.8 | 1.8 | 1.9 | 1.8 | 1.7 | 2.1 | 1.8 | 1.8 | 2.7 | 1.8 | 1.7 | 1.9 | 2.1 | 1.9 | 2.1 | 1.9 | 1.8 | 2.2 | 2.2 | 2.3 | 2.3 | 2.2 | 2.1 | 2.2 | 2.4 | 2.1 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 1.9 | 2.0 | 2.2 | 2.1 | 2.1 | 1.8 | 1.6 | 2.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 511 | 317 | 201 | 243 | 376 | -271.2 | 211 | 137 | 138 | 126 | 128 | 145 | 129 | 126 | 173 | 157 | 144 | 159 | 187 | 174 | 183 | 156 | 159 | 195 | 186 | 181 | 188 | 173 | 164 | 155 | 170 | 151 | 146 | 135 | 135 | 132 | 129 | 119 | 112 | 115 | 118 | 114 | 109 | 93 | 82 |
| Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 7.3 | 5.4 | 3.5 | 4.5 | 8.3 | -5.8 | 3.8 | 2.5 | 2.6 | 2.5 | 2.4 | 2.7 | 2.4 | 2.4 | 3.1 | 2.9 | 2.7 | 3.1 | 3.4 | 3.1 | 3.4 | 3.1 | 3.0 | 3.6 | 3.6 | 3.7 | 3.7 | 3.5 | 3.4 | 3.6 | 3.8 | 3.4 | 3.3 | 3.3 | 3.2 | 3.4 | 3.3 | 3.3 | 3.1 | 3.3 | 3.5 | 3.5 | 3.4 | 2.9 | 2.6 |
| 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 | 126 | 77 | 49 | 60 | 96 | -39.0 | 53 | 37 | 37 | 34 | 35 | 32 | 32 | 32 | 22 | 60 | 57 | 61 | 71 | 67 | 71 | 60 | 61 | 76 | 71 | 69 | 71 | 67 | 63 | 60 | 60 | 58 | 56 | 52 | 52 | 50 | 50 | 46 | 42 | 44 | 45 | 44 | 41 | 35 | 32 | 37 |
| 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 |
| Percentage of Revenues | 1.8 | 1.3 | 0.9 | 1.1 | 2.1 | -0.8 | 1.0 | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.4 | 1.1 | 1.1 | 1.2 | 1.3 | 1.2 | 1.3 | 1.2 | 1.1 | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.4 | 1.3 | 1.3 | 1.3 | 1.3 | 1.2 | 1.3 | 1.3 | 1.3 | 1.2 | 1.3 | 1.4 | 1.3 | 1.3 | 1.1 | 1.0 | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 |
| Value | 190 | 0.1 | 74 | 112 | 2.7 | 0.5 | 4.3 | 27 | 74 | 1.2 | 27 | 11 | 86 | 84 | 0.7 | 2.2 | 124 | -0.5 | 72 | 61 | 131 | 0.9 | 60 | 57 | 142 | 18 | 44 | 39 | 131 | 8.9 | 45 | 42 | 104 | 8.9 | 34 | 22 | 89 | 0.8 | 25 | 12 | 77 | 5.8 | 9.2 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 2.7 | 0.0 | 1.3 | 2.1 | 0.1 | 0.0 | 0.1 | 0.5 | 1.4 | 0.0 | 0.5 | 0.2 | 1.6 | 1.6 | 0.0 | 0.0 | 2.4 | -0.0 | 1.3 | 1.1 | 2.4 | 0.0 | 1.1 | 1.1 | 2.7 | 0.4 | 0.9 | 0.8 | 2.8 | 0.2 | 1.0 | 0.9 | 2.3 | 0.2 | 0.8 | 0.6 | 2.3 | 0.0 | 0.7 | 0.4 | 2.3 | 0.2 | 0.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 20 | 21 | 23 | 23 | 23 | 23 | 25 | 26 | 27 | 27 | 29 | 28 | 29 | 32 | 32 | 30 | 29 | 28 | 29 | 28 | 28 | 28 | 26 | 21 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 22 | 22 | 20 | 17 | 16 | 15 | 16 | 16 | 16 | 14 |
| 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 |
| Percentage of Revenues | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
| Value | 45 | 17 | 55 | 25 | 35 | 47 | 57 | 54 | 69 | 60 | 66 | 55 | 77 | 46 | 57 |
| 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 | 100.0 |
| Percentage of Revenues | 0.7 | 0.3 | 1.0 | 0.5 | 0.8 | 1.0 | 1.0 | 1.0 | 1.3 | 1.2 | 1.2 | 1.0 | 1.4 | 0.9 | 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 | 384 | 239 | 151 | 182 | 279 | -232.3 | 157 | 99 | 100 | 92 | 92 | 112 | 97 | 93 | 151 | 97 | 87 | 98 | 115 | 107 | 112 | 95 | 97 | 118 | 115 | 111 | 116 | 106 | 100 | 95 | 109 | 92 | 89 | 83 | 83 | 81 | 78 | 73 | 69 | 70 | 71 | 69 | 67 | 56 | 47 | 55 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 4.1 | 2.6 | 3.4 | 6.2 | -5.0 | 2.8 | 1.8 | 1.9 | 1.8 | 1.7 | 2.1 | 1.8 | 1.8 | 2.7 | 1.8 | 1.7 | 1.9 | 2.1 | 1.9 | 2.1 | 1.9 | 1.8 | 2.2 | 2.2 | 2.3 | 2.3 | 2.2 | 2.1 | 2.2 | 2.4 | 2.1 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 1.9 | 2.0 | 2.2 | 2.1 | 2.1 | 1.7 | 1.5 | 1.9 |
| 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 384 | 239 | 182 | 279 | -232.3 | 99 | 100 | 92 | 92 | 112 | 97 | 93 | 151 | 97 | 87 | 98 | 115 | 107 | 112 | 95 | 97 | 118 | 115 | 111 | 116 | 106 | 100 | 95 | 109 | 92 | 89 | 83 | 83 | 81 | 78 | 73 | 69 | 70 | 71 | 69 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 4.1 | 3.4 | 6.2 | -5.0 | 1.8 | 1.9 | 1.8 | 1.7 | 2.1 | 1.8 | 1.8 | 2.7 | 1.8 | 1.7 | 1.9 | 2.1 | 1.9 | 2.1 | 1.9 | 1.8 | 2.2 | 2.2 | 2.3 | 2.3 | 2.2 | 2.1 | 2.2 | 2.4 | 2.1 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 1.9 | 2.0 | 2.2 | 2.1 |
| Percentage of Revenues us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 530 | 336 | 309 | 271 | 201 | -219.3 | 235 | 193 | 203 | 190 | 197 | 203 | 191 | 185 | 229 | 211 | 196 | 206 | 236 | 219 | 226 | 207 | 200 | 235 | 222 | 214 | 226 | 207 | 197 | 189 | 202 | 187 | 180 | 169 | 168 | 163 | 164 | 148 | 143 | 144 | 144 | 140 | 134 | 120 | 126 | 115 |
| 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 Revenues | 7.6 | 5.7 | 5.3 | 5.0 | 4.4 | -4.7 | 4.2 | 3.5 | 3.8 | 3.8 | 3.6 | 3.8 | 3.5 | 3.5 | 4.0 | 3.9 | 3.7 | 4.0 | 4.3 | 3.9 | 4.2 | 4.1 | 3.8 | 4.4 | 4.3 | 4.3 | 4.5 | 4.2 | 4.1 | 4.3 | 4.5 | 4.2 | 4.1 | 4.1 | 4.0 | 4.2 | 4.2 | 4.1 | 3.9 | 4.1 | 4.3 | 4.2 | 4.1 | 3.7 | 4.1 | 4.1 |
| 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 | 8.9 | 11 | -73.8 | 6.4 | 214 | -3.0 | 29 | 2.6 | -0.3 | 1.9 | -3.1 | 2.3 | 0.2 | 0.8 | 2.9 | 1.6 | 1.8 | 3.0 | 0.3 | 2.6 | 4.2 | -3.4 | 1.4 | -4.3 | 0.5 | 1.1 | -0.6 | 1.1 | 0.9 | 1.5 | 3.4 | -0.7 | 1.3 | 1.6 | 0.5 | 2.5 | -1.4 | 2.0 | -0.3 | -2.4 | 0.5 | 1.7 | 2.6 | -0.7 | -0.3 | -0.1 |
| 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 | 100.0 |
| Percentage of Revenues | 0.1 | 0.2 | -1.3 | 0.1 | 4.7 | -0.1 | 0.5 | 0.0 | -0.0 | 0.0 | -0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | -0.1 | 0.0 | -0.1 | 0.0 | 0.0 | -0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -0.0 | 0.0 | 0.0 | 0.0 | 0.1 | -0.0 | 0.1 | -0.0 | -0.1 | 0.0 | 0.1 | 0.1 | -0.0 | -0.0 | -0.0 |
| Period End | 2021-03-31 |
| Value | 7.5 |
| Percentage of RealizedInvestmentGainsLosses | 100.0 |
| Percentage of Revenues | 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 |
| Value | 6978 | 5903 | 5785 | 5404 | 4533 | 4667 | 5548 | 5461 | 5343 | 4981 | 5411 | 5349 | 5392 | 5259 | 5683 | 5432 | 5279 | 5139 | 5480 | 5567 | 5441 | 5119 | 5339 | 5353 | 5224 | 4944 | 5047 | 4909 | 4788 | 4363 | 4523 | 4470 | 4426 | 4096 | 4173 | 3933 | 3904 | 3657 | 3678 | 3506 | 3336 | 3311 | 3246 | 3273 | 3104 | 2836 |
| 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 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 369 | 313 | 295 | 281 | 246 | 235 | 265 | 266 | 255 | 236 | 245 | 247 | 247 | 240 | 247 | 241 | 228 | 221 | 216 | 229 | 225 | 223 | 216 | 227 | 217 | 207 | 196 | 196 | 185 | 172 | 169 | 174 | 173 | 155 | 148 | 147 | 145 | 130 | 124 | 121 | 117 | 110 | 107 | 111 | 104 |
| Percentage of Revenues | 5.3 | 5.3 | 5.1 | 5.2 | 5.4 | 5.1 | 4.8 | 4.9 | 4.8 | 4.7 | 4.5 | 4.6 | 4.6 | 4.6 | 4.3 | 4.4 | 4.3 | 4.3 | 4.0 | 4.1 | 4.1 | 4.4 | 4.1 | 4.2 | 4.2 | 4.2 | 3.9 | 4.0 | 3.9 | 4.0 | 3.7 | 3.9 | 3.9 | 3.8 | 3.6 | 3.7 | 3.7 | 3.6 | 3.4 | 3.5 | 3.5 | 3.3 | 3.3 | 3.4 | 3.4 |
| Percentage of Revenues | 5.3 | 5.3 | 5.1 | 5.2 | 5.4 | 5.1 | 4.8 | 4.9 | 4.8 | 4.7 | 4.5 | 4.6 | 4.6 | 4.6 | 4.3 | 4.4 | 4.3 | 4.3 | 4.0 | 4.1 | 4.1 | 4.4 | 4.1 | 4.2 | 4.2 | 4.2 | 3.9 | 4.0 | 3.9 | 4.0 | 3.7 | 3.9 | 3.9 | 3.8 | 3.6 | 3.7 | 3.7 | 3.6 | 3.4 | 3.5 | 3.5 | 3.3 | 3.3 | 3.4 | 3.4 |
| Percentage of Revenues an:FinanceAndInsuranceNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 3428 | 2982 | 3127 | 2748 | 2261 | 2281 | 3025 | 2874 | 2769 | 2496 | 3066 | 2933 | 2949 | 2802 | 3345 | 3108 | 2930 | 2796 | 3187 | 3195 | 3071 | 2800 | 3144 | 3113 | 2967 | 2769 | 2983 | 2823 | 2736 | 2428 | 2636 | 2561 | 2493 | 2257 | 2476 | 2240 | 2196 | 1994 | 2085 | 1881 | 1746 | 1785 | 1778 | 1773 | 1656 |
| Percentage of Revenues | 49.1 | 50.5 | 54.1 | 50.9 | 49.9 | 48.9 | 54.5 | 52.6 | 51.8 | 50.1 | 56.7 | 54.8 | 54.7 | 53.3 | 58.9 | 57.2 | 55.5 | 54.4 | 58.2 | 57.4 | 56.5 | 54.7 | 58.9 | 58.2 | 56.8 | 56.0 | 59.1 | 57.5 | 57.2 | 55.7 | 58.3 | 57.3 | 56.3 | 55.1 | 59.3 | 57.0 | 56.2 | 54.5 | 56.7 | 53.7 | 52.4 | 53.9 | 54.8 | 54.2 | 53.4 |
| Percentage of Revenues | 49.1 | 50.5 | 54.1 | 50.9 | 49.9 | 48.9 | 54.5 | 52.6 | 51.8 | 50.1 | 56.7 | 54.8 | 54.7 | 53.3 | 58.9 | 57.2 | 55.5 | 54.4 | 58.2 | 57.4 | 56.5 | 54.7 | 58.9 | 58.2 | 56.8 | 56.0 | 59.1 | 57.5 | 57.2 | 55.7 | 58.3 | 57.3 | 56.3 | 55.1 | 59.3 | 57.0 | 56.2 | 54.5 | 56.7 | 53.7 | 52.4 | 53.9 | 54.8 | 54.2 | 53.4 |
| Percentage of Revenues an:NewVehicle | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 950 | 851 | 838 | 852 | 689 | 876 | 891 | 902 | 901 | 876 | 868 | 864 | 857 | 858 | 854 | 841 | 857 | 845 | 822 | 843 | 834 | 820 | 778 | 783 | 777 | 743 | 729 | 717 | 704 | 671 | 651 | 653 | 655 | 636 | 600 | 596 | 602 | 599 | 573 | 578 | 572 | 570 | 560 | 564 | 547 |
| Percentage of Revenues | 13.6 | 14.4 | 14.5 | 15.8 | 15.2 | 18.8 | 16.1 | 16.5 | 16.9 | 17.6 | 16.0 | 16.2 | 15.9 | 16.3 | 15.0 | 15.5 | 16.2 | 16.4 | 15.0 | 15.2 | 15.3 | 16.0 | 14.6 | 14.6 | 14.9 | 15.0 | 14.4 | 14.6 | 14.7 | 15.4 | 14.4 | 14.6 | 14.8 | 15.5 | 14.4 | 15.2 | 15.4 | 16.4 | 15.6 | 16.5 | 17.1 | 17.2 | 17.3 | 17.2 | 17.6 |
| Percentage of Revenues | 13.6 | 14.4 | 14.5 | 15.8 | 15.2 | 18.8 | 16.1 | 16.5 | 16.9 | 17.6 | 16.0 | 16.2 | 15.9 | 16.3 | 15.0 | 15.5 | 16.2 | 16.4 | 15.0 | 15.2 | 15.3 | 16.0 | 14.6 | 14.6 | 14.9 | 15.0 | 14.4 | 14.6 | 14.7 | 15.4 | 14.4 | 14.6 | 14.8 | 15.5 | 14.4 | 15.2 | 15.4 | 16.4 | 15.6 | 16.5 | 17.1 | 17.2 | 17.3 | 17.2 | 17.6 |
| Percentage of Revenues an:PartsAndService | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 2222 | 1749 | 1511 | 1516 | 1324 | 1248 | 1344 | 1402 | 1379 | 1339 | 1212 | 1281 | 1298 | 1330 | 1208 | 1228 | 1201 | 1240 | 1217 | 1276 | 1259 | 1241 | 1153 | 1205 | 1216 | 1193 | 1105 | 1148 | 1082 | 1049 | 1016 | 1044 | 1056 | 1009 | 912 | 936 | 947 | 918 | 882 | 911 | 887 | 831 | 788 | 812 | 783 |
| Percentage of Revenues | 31.9 | 29.6 | 26.1 | 28.1 | 29.2 | 26.8 | 24.2 | 25.7 | 25.8 | 26.9 | 22.4 | 24.0 | 24.1 | 25.3 | 21.3 | 22.6 | 22.8 | 24.1 | 22.2 | 22.9 | 23.1 | 24.3 | 21.6 | 22.5 | 23.3 | 24.1 | 21.9 | 23.4 | 22.6 | 24.1 | 22.5 | 23.4 | 23.9 | 24.6 | 21.9 | 23.8 | 24.3 | 25.1 | 24.0 | 26.0 | 26.6 | 25.1 | 24.3 | 24.8 | 25.2 |
| Percentage of Revenues | 31.9 | 29.6 | 26.1 | 28.1 | 29.2 | 26.8 | 24.2 | 25.7 | 25.8 | 26.9 | 22.4 | 24.0 | 24.1 | 25.3 | 21.3 | 22.6 | 22.8 | 24.1 | 22.2 | 22.9 | 23.1 | 24.3 | 21.6 | 22.5 | 23.3 | 24.1 | 21.9 | 23.4 | 22.6 | 24.1 | 22.5 | 23.4 | 23.9 | 24.6 | 21.9 | 23.8 | 24.3 | 25.1 | 24.0 | 26.0 | 26.6 | 25.1 | 24.3 | 24.8 | 25.2 |
| Percentage of Revenues an:UsedVehicle | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 7.4 | 8.4 | 12 | 5.6 | 10 | 24 | 22 | 14 | 38 | 32 | 19 | 23 | 38 | 27 | 28 | 12 |
| Percentage of Revenues | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.5 | 0.4 | 0.3 | 0.7 | 0.6 | 0.4 | 0.4 | 0.7 | 0.5 | 0.5 | 0.2 |
| Percentage of Revenues | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 | 0.5 | 0.4 | 0.3 | 0.7 | 0.6 | 0.4 | 0.4 | 0.7 | 0.5 | 0.5 | 0.2 |
| Percentage of Revenues us-gaap:ProductAndServiceOther | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 125 | 109 | 101 | 97 | 88 | 83 | 89 | 95 | 89 | 80 | 81 | 88 | 88 | 85 |
| Percentage of Revenues | 1.8 | 1.9 | 1.8 | 1.8 | 1.9 | 1.8 | 1.6 | 1.7 | 1.7 | 1.6 | 1.5 | 1.7 | 1.6 | 1.6 |
| Percentage of Revenues | 1.8 | 1.9 | 1.8 | 1.8 | 1.9 | 1.8 | 1.6 | 1.7 | 1.7 | 1.6 | 1.5 | 1.7 | 1.6 | 1.6 |
| Percentage of Revenues an:FinanceAndInsuranceNet an:ANReportableSegmentDomestic | 100.0 | 100.0 | 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 | 133 | 109 | 100 | 95 | 82 | 84 | 92 | 99 | 91 | 84 | 86 | 94 | 92 | 89 |
| Percentage of Revenues | 1.9 | 1.8 | 1.7 | 1.8 | 1.8 | 1.8 | 1.7 | 1.8 | 1.7 | 1.7 | 1.6 | 1.8 | 1.7 | 1.7 |
| Percentage of Revenues | 1.9 | 1.8 | 1.7 | 1.8 | 1.8 | 1.8 | 1.7 | 1.8 | 1.7 | 1.7 | 1.6 | 1.8 | 1.7 | 1.7 |
| Percentage of Revenues an:FinanceAndInsuranceNet an:ANReportableSegmentImport | 100.0 | 100.0 | 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 | 108 | 86 | 89 | 77 | 64 | 63 | 79 | 70 | 68 | 61 | 67 | 60 | 60 | 58 |
| Percentage of Revenues | 1.5 | 1.5 | 1.6 | 1.4 | 1.4 | 1.3 | 1.4 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 |
| Percentage of Revenues | 1.5 | 1.5 | 1.6 | 1.4 | 1.4 | 1.3 | 1.4 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 |
| Percentage of Revenues an:FinanceAndInsuranceNet an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 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 | 2.0 | 7.8 | 4.3 | 10 | 11 | 5.7 | 4.4 | 1.2 | 5.6 | 10.0 | 10.0 | 4.4 | 6.3 | 7.7 |
| Percentage of Revenues | 0.0 | 0.1 | 0.1 | 0.2 | 0.3 | 0.1 | 0.1 | 0.0 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues | 0.0 | 0.1 | 0.1 | 0.2 | 0.3 | 0.1 | 0.1 | 0.0 | 0.1 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues an:FinanceAndInsuranceNet us-gaap:CorporateAndOther | 100.0 | 100.0 | 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 | 991 | 935 | 987 | 923 | 761 | 738 | 901 | 925 | 894 | 781 | 987 | 988 | 991 | 933 |
| Percentage of Revenues | 14.2 | 15.8 | 17.1 | 17.1 | 16.8 | 15.8 | 16.2 | 16.9 | 16.7 | 15.7 | 18.2 | 18.5 | 18.4 | 17.7 |
| Percentage of Revenues | 14.2 | 15.8 | 17.1 | 17.1 | 16.8 | 15.8 | 16.2 | 16.9 | 16.7 | 15.7 | 18.2 | 18.5 | 18.4 | 17.7 |
| Percentage of Revenues an:NewVehicle an:ANReportableSegmentDomestic | 100.0 | 100.0 | 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 | 1184 | 958 | 949 | 887 | 712 | 733 | 955 | 1003 | 916 | 820 | 1001 | 1070 | 1018 | 955 |
| Percentage of Revenues | 17.0 | 16.2 | 16.4 | 16.4 | 15.7 | 15.7 | 17.2 | 18.4 | 17.1 | 16.5 | 18.5 | 20.0 | 18.9 | 18.2 |
| Percentage of Revenues | 17.0 | 16.2 | 16.4 | 16.4 | 15.7 | 15.7 | 17.2 | 18.4 | 17.1 | 16.5 | 18.5 | 20.0 | 18.9 | 18.2 |
| Percentage of Revenues an:NewVehicle an:ANReportableSegmentImport | 100.0 | 100.0 | 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 | 1252 | 1088 | 1190 | 937 | 787 | 809 | 1168 | 945 | 959 | 895 | 1078 | 874 | 939 | 912 |
| Percentage of Revenues | 18.0 | 18.4 | 20.6 | 17.3 | 17.4 | 17.3 | 21.1 | 17.3 | 17.9 | 18.0 | 19.9 | 16.3 | 17.4 | 17.4 |
| Percentage of Revenues | 18.0 | 18.4 | 20.6 | 17.3 | 17.4 | 17.3 | 21.1 | 17.3 | 17.9 | 18.0 | 19.9 | 16.3 | 17.4 | 17.4 |
| Percentage of Revenues an:NewVehicle an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 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 | 257 | 234 | 229 | 233 | 193 | 235 | 236 | 244 | 241 | 236 | 272 | 271 | 268 | 270 |
| Percentage of Revenues | 3.7 | 4.0 | 4.0 | 4.3 | 4.3 | 5.0 | 4.3 | 4.5 | 4.5 | 4.7 | 5.0 | 5.1 | 5.0 | 5.1 |
| Percentage of Revenues | 3.7 | 4.0 | 4.0 | 4.3 | 4.3 | 5.0 | 4.3 | 4.5 | 4.5 | 4.7 | 5.0 | 5.1 | 5.0 | 5.1 |
| Percentage of Revenues an:PartsAndService an:ANReportableSegmentDomestic | 100.0 | 100.0 | 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 | 248 | 214 | 213 | 220 | 170 | 207 | 214 | 226 | 229 | 220 | 227 | 235 | 237 | 234 |
| Percentage of Revenues | 3.6 | 3.6 | 3.7 | 4.1 | 3.8 | 4.4 | 3.9 | 4.1 | 4.3 | 4.4 | 4.2 | 4.4 | 4.4 | 4.5 |
| Percentage of Revenues | 3.6 | 3.6 | 3.7 | 4.1 | 3.8 | 4.4 | 3.9 | 4.1 | 4.3 | 4.4 | 4.2 | 4.4 | 4.4 | 4.5 |
| Percentage of Revenues an:PartsAndService an:ANReportableSegmentImport | 100.0 | 100.0 | 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 | 317 | 285 | 279 | 278 | 223 | 277 | 288 | 283 | 285 | 278 | 278 | 269 | 266 | 268 |
| Percentage of Revenues | 4.6 | 4.8 | 4.8 | 5.2 | 4.9 | 5.9 | 5.2 | 5.2 | 5.3 | 5.6 | 5.1 | 5.0 | 4.9 | 5.1 |
| Percentage of Revenues | 4.6 | 4.8 | 4.8 | 5.2 | 4.9 | 5.9 | 5.2 | 5.2 | 5.3 | 5.6 | 5.1 | 5.0 | 4.9 | 5.1 |
| Percentage of Revenues an:PartsAndService an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 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 | 126 | 117 | 116 | 120 | 103 | 155 | 152 | 148 | 145 | 142 | 90 | 87 | 85 | 85 |
| Percentage of Revenues | 1.8 | 2.0 | 2.0 | 2.2 | 2.3 | 3.3 | 2.7 | 2.7 | 2.7 | 2.9 | 1.7 | 1.6 | 1.6 | 1.6 |
| Percentage of Revenues | 1.8 | 2.0 | 2.0 | 2.2 | 2.3 | 3.3 | 2.7 | 2.7 | 2.7 | 2.9 | 1.7 | 1.6 | 1.6 | 1.6 |
| Percentage of Revenues an:PartsAndService us-gaap:CorporateAndOther | 100.0 | 100.0 | 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 | 749 | 563 | 462 | 478 | 436 | 404 | 422 | 456 | 447 | 443 | 390 | 424 | 447 | 462 |
| Percentage of Revenues | 10.7 | 9.5 | 8.0 | 8.8 | 9.6 | 8.7 | 7.6 | 8.4 | 8.4 | 8.9 | 7.2 | 7.9 | 8.3 | 8.8 |
| Percentage of Revenues | 10.7 | 9.5 | 8.0 | 8.8 | 9.6 | 8.7 | 7.6 | 8.4 | 8.4 | 8.9 | 7.2 | 7.9 | 8.3 | 8.8 |
| Percentage of Revenues an:UsedVehicle an:ANReportableSegmentDomestic | 100.0 | 100.0 | 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 | 604 | 484 | 411 | 415 | 355 | 334 | 358 | 386 | 388 | 369 | 326 | 365 | 360 | 366 |
| Percentage of Revenues | 8.7 | 8.2 | 7.1 | 7.7 | 7.8 | 7.2 | 6.5 | 7.1 | 7.3 | 7.4 | 6.0 | 6.8 | 6.7 | 7.0 |
| Percentage of Revenues | 8.7 | 8.2 | 7.1 | 7.7 | 7.8 | 7.2 | 6.5 | 7.1 | 7.3 | 7.4 | 6.0 | 6.8 | 6.7 | 7.0 |
| Percentage of Revenues an:UsedVehicle an:ANReportableSegmentImport | 100.0 | 100.0 | 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 | 788 | 642 | 591 | 576 | 490 | 467 | 521 | 519 | 507 | 496 | 469 | 463 | 464 | 478 |
| Percentage of Revenues | 11.3 | 10.9 | 10.2 | 10.7 | 10.8 | 10.0 | 9.4 | 9.5 | 9.5 | 10.0 | 8.7 | 8.7 | 8.6 | 9.1 |
| Percentage of Revenues | 11.3 | 10.9 | 10.2 | 10.7 | 10.8 | 10.0 | 9.4 | 9.5 | 9.5 | 10.0 | 8.7 | 8.7 | 8.6 | 9.1 |
| Percentage of Revenues an:UsedVehicle an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 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 | 80 | 58 | 46 | 47 | 41 | 42 | 42 | 40 | 36 | 30 | 26 | 28 | 27 | 22 |
| Percentage of Revenues | 1.2 | 1.0 | 0.8 | 0.9 | 0.9 | 0.9 | 0.8 | 0.7 | 0.7 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 |
| Percentage of Revenues | 1.2 | 1.0 | 0.8 | 0.9 | 0.9 | 0.9 | 0.8 | 0.7 | 0.7 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 |
| Percentage of Revenues an:UsedVehicle us-gaap:CorporateAndOther | 100.0 | 100.0 | 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 | 0.7 | 4.2 | 6.5 | 2.1 | 6.2 | 21 | 16 | 6.8 | 34 | 27 | 13 | 16 | 29 | 21 |
| Percentage of Revenues | 0.0 | 0.1 | 0.1 | 0.0 | 0.1 | 0.5 | 0.3 | 0.1 | 0.7 | 0.6 | 0.3 | 0.3 | 0.6 | 0.4 |
| Percentage of Revenues | 0.0 | 0.1 | 0.1 | 0.0 | 0.1 | 0.5 | 0.3 | 0.1 | 0.7 | 0.6 | 0.3 | 0.3 | 0.6 | 0.4 |
| Percentage of Revenues us-gaap:ProductAndServiceOther an:ANReportableSegmentDomestic | 100.0 | 100.0 | 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 | 4.6 | 3.7 | 5.3 | 3.2 | 4.1 | 2.2 | 2.6 | 6.3 | 2.6 | 1.7 | 3.9 | 4.8 | 8.8 | 6.4 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.1 |
| Percentage of Revenues | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | 0.1 |
| Percentage of Revenues us-gaap:ProductAndServiceOther an:ANReportableSegmentImport | 100.0 | 100.0 | 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 | 1.3 | 0.3 | 0.2 | 0.1 | 0.0 | 0.0 | 2.1 | 1.4 | 0.0 | 2.1 | 1.3 | 1.5 | 0.1 | 0.3 |
| Percentage of Revenues | 0.0 | 0.0 | 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 Revenues | 0.0 | 0.0 | 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 Revenues us-gaap:ProductAndServiceOther an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 0.8 | 0.2 | 0.6 | 0.2 | 0.6 | 0.8 | 1.0 | 0.2 | 0.7 | 0.8 | 0.2 | 0.1 | 0.1 | 0.1 |
| Percentage of Revenues | 0.0 | 0.0 | 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 Revenues | 0.0 | 0.0 | 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 Revenues us-gaap:ProductAndServiceOther us-gaap:CorporateAndOther | 100.0 | 100.0 | 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 |
| Value | 2124 | 1846 | 1786 | 1734 | 1486 | 1483 | 1666 | 1728 | 1707 | 1568 | 1745 | 1789 | 1826 | 1773 | 1895 | 1912 | 1844 | 1800 | 1921 | 2044 | 1995 | 1848 | 1770 | 1869 | 1764 | 1665 | 1620 | 1660 | 1604 | 1473 | 1450 | 1491 | 1515 |
| Percentage of Revenues | 30.4 | 31.3 | 30.9 | 32.1 | 32.8 | 31.8 | 30.0 | 31.7 | 31.9 | 31.5 | 32.2 | 33.5 | 33.9 | 33.7 | 33.3 | 35.2 | 34.9 | 35.0 | 35.1 | 36.7 | 36.7 | 36.1 | 33.2 | 34.9 | 33.8 | 33.7 | 32.1 | 33.8 | 33.5 | 33.8 | 32.1 | 33.4 | 34.2 |
| Percentage of Revenues | 30.4 | 31.3 | 30.9 | 32.1 | 32.8 | 31.8 | 30.0 | 31.7 | 31.9 | 31.5 | 32.2 | 33.5 | 33.9 | 33.7 | 33.3 | 35.2 | 34.9 | 35.0 | 35.1 | 36.7 | 36.7 | 36.1 | 33.2 | 34.9 | 33.8 | 33.7 | 32.1 | 33.8 | 33.5 | 33.8 | 32.1 | 33.4 | 34.2 |
| Percentage of Revenues an:ANReportableSegmentDomestic | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 2175 | 1769 | 1679 | 1621 | 1325 | 1362 | 1622 | 1722 | 1627 | 1496 | 1646 | 1770 | 1717 | 1652 | 1749 | 1789 | 1702 | 1631 | 1684 | 1779 | 1748 | 1675 | 1726 | 1837 | 1795 | 1678 | 1662 | 1787 | 1717 | 1549 | 1546 | 1695 | 1629 |
| Percentage of Revenues | 31.2 | 30.0 | 29.0 | 30.0 | 29.2 | 29.2 | 29.2 | 31.5 | 30.5 | 30.0 | 30.4 | 33.1 | 31.8 | 31.4 | 30.8 | 32.9 | 32.2 | 31.7 | 30.7 | 32.0 | 32.1 | 32.7 | 32.3 | 34.3 | 34.4 | 34.0 | 32.9 | 36.4 | 35.9 | 35.5 | 34.2 | 37.9 | 36.8 |
| Percentage of Revenues | 31.2 | 30.0 | 29.0 | 30.0 | 29.2 | 29.2 | 29.2 | 31.5 | 30.5 | 30.0 | 30.4 | 33.1 | 31.8 | 31.4 | 30.8 | 32.9 | 32.2 | 31.7 | 30.7 | 32.0 | 32.1 | 32.7 | 32.3 | 34.3 | 34.4 | 34.0 | 32.9 | 36.4 | 35.9 | 35.5 | 34.2 | 37.9 | 36.8 |
| Percentage of Revenues an:ANReportableSegmentImport | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 2468 | 2103 | 2151 | 1870 | 1564 | 1616 | 2059 | 1820 | 1820 | 1734 | 1894 | 1668 | 1730 | 1717 | 1937 | 1634 | 1644 | 1616 | 1799 | 1680 | 1644 | 1540 | 1804 | 1607 | 1633 | 1563 | 1728 | 1422 | 1431 | 1306 | 1489 | 1247 | 1242 |
| Percentage of Revenues | 35.4 | 35.6 | 37.2 | 34.6 | 34.5 | 34.6 | 37.1 | 33.3 | 34.1 | 34.8 | 35.0 | 31.2 | 32.1 | 32.7 | 34.1 | 30.1 | 31.1 | 31.5 | 32.8 | 30.2 | 30.2 | 30.1 | 33.8 | 30.0 | 31.3 | 31.6 | 34.2 | 29.0 | 29.9 | 29.9 | 32.9 | 27.9 | 28.1 |
| Percentage of Revenues | 35.4 | 35.6 | 37.2 | 34.6 | 34.5 | 34.6 | 37.1 | 33.3 | 34.1 | 34.8 | 35.0 | 31.2 | 32.1 | 32.7 | 34.1 | 30.1 | 31.1 | 31.5 | 32.8 | 30.2 | 30.2 | 30.1 | 33.8 | 30.0 | 31.3 | 31.6 | 34.2 | 29.0 | 29.9 | 29.9 | 32.9 | 27.9 | 28.1 |
| Percentage of Revenues an:ANReportableSegmentPremiumLuxury | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 210 | 184 | 168 | 178 | 156 | 204 | 200 | 189 | 188 | 182 | 126 | 120 | 118 | 115 | 100 | 96 | 88 | 90 | 75 | 63 | 53 | 56 | 38 | 40 | 32 | 36 | 36 | 37 | 33 | 34 | 37 | 36 | 39 | 41 | 36 | 39 | 40 | 39 | 36 | 35 |
| Percentage of Revenues | 3.0 | 3.1 | 2.9 | 3.3 | 3.5 | 4.4 | 3.6 | 3.5 | 3.5 | 3.7 | 2.3 | 2.2 | 2.2 | 2.2 | 1.8 | 1.8 | 1.7 | 1.8 | 1.4 | 1.1 | 1.0 | 1.1 | 0.7 | 0.8 | 0.6 | 0.7 | 0.7 | 0.8 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 1.0 | 0.9 | 1.0 | 1.0 | 1.1 | 1.0 | 1.0 |
| Percentage of Revenues | 3.0 | 3.1 | 2.9 | 3.3 | 3.5 | 4.4 | 3.6 | 3.5 | 3.5 | 3.7 | 2.3 | 2.2 | 2.2 | 2.2 | 1.8 | 1.8 | 1.7 | 1.8 | 1.4 | 1.1 | 1.0 | 1.1 | 0.7 | 0.8 | 0.6 | 0.7 | 0.7 | 0.8 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 1.0 | 0.9 | 1.0 | 1.0 | 1.1 | 1.0 | 1.0 |
| Percentage of Revenues us-gaap:CorporateAndOther | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1944 | 1681 | 1623 | 1563 | 1343 | 1311 | 1496 | 1547 | 1528 | 1398 | 1571 | 1613 | 1653 | 1602 |
| Percentage of Revenues | 27.9 | 28.5 | 28.1 | 28.9 | 29.6 | 28.1 | 27.0 | 28.3 | 28.6 | 28.1 | 29.0 | 30.2 | 30.7 | 30.5 |
| Percentage of Revenues | 27.9 | 28.5 | 28.1 | 28.9 | 29.6 | 28.1 | 27.0 | 28.3 | 28.6 | 28.1 | 29.0 | 30.2 | 30.7 | 30.5 |
| Percentage of Revenues an:ANReportableSegmentDomestic us-gaap:TransferredAtPointInTime | 100.0 | 100.0 | 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 | 180 | 165 | 163 | 171 | 142 | 172 | 170 | 181 | 178 | 170 | 173 | 176 | 172 | 170 |
| Percentage of Revenues | 2.6 | 2.8 | 2.8 | 3.2 | 3.2 | 3.7 | 3.1 | 3.3 | 3.3 | 3.4 | 3.2 | 3.3 | 3.2 | 3.2 |
| Percentage of Revenues | 2.6 | 2.8 | 2.8 | 3.2 | 3.2 | 3.7 | 3.1 | 3.3 | 3.3 | 3.4 | 3.2 | 3.3 | 3.2 | 3.2 |
| Percentage of Revenues an:ANReportableSegmentDomestic us-gaap:TransferredOverTime | 100.0 | 100.0 | 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 | 1984 | 1604 | 1513 | 1443 | 1187 | 1200 | 1455 | 1543 | 1445 | 1324 | 1475 | 1591 | 1536 | 1475 |
| Percentage of Revenues | 28.4 | 27.2 | 26.2 | 26.7 | 26.2 | 25.7 | 26.2 | 28.3 | 27.0 | 26.6 | 27.3 | 29.8 | 28.5 | 28.0 |
| Percentage of Revenues | 28.4 | 27.2 | 26.2 | 26.7 | 26.2 | 25.7 | 26.2 | 28.3 | 27.0 | 26.6 | 27.3 | 29.8 | 28.5 | 28.0 |
| Percentage of Revenues an:ANReportableSegmentImport us-gaap:TransferredAtPointInTime | 100.0 | 100.0 | 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 | 190 | 165 | 166 | 178 | 138 | 161 | 167 | 179 | 182 | 171 | 170 | 179 | 180 | 177 |
| Percentage of Revenues | 2.7 | 2.8 | 2.9 | 3.3 | 3.1 | 3.5 | 3.0 | 3.3 | 3.4 | 3.4 | 3.1 | 3.3 | 3.3 | 3.4 |
| Percentage of Revenues | 2.7 | 2.8 | 2.9 | 3.3 | 3.1 | 3.5 | 3.0 | 3.3 | 3.4 | 3.4 | 3.1 | 3.3 | 3.3 | 3.4 |
| Percentage of Revenues an:ANReportableSegmentImport us-gaap:TransferredOverTime | 100.0 | 100.0 | 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 | 2204 | 1863 | 1913 | 1633 | 1373 | 1380 | 1813 | 1579 | 1577 | 1497 | 1657 | 1441 | 1506 | 1492 |
| Percentage of Revenues | 31.6 | 31.6 | 33.1 | 30.2 | 30.3 | 29.6 | 32.7 | 28.9 | 29.5 | 30.1 | 30.6 | 26.9 | 27.9 | 28.4 |
| Percentage of Revenues | 31.6 | 31.6 | 33.1 | 30.2 | 30.3 | 29.6 | 32.7 | 28.9 | 29.5 | 30.1 | 30.6 | 26.9 | 27.9 | 28.4 |
| Percentage of Revenues an:ANReportableSegmentPremiumLuxury us-gaap:TransferredAtPointInTime | 100.0 | 100.0 | 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 | 264 | 239 | 237 | 236 | 191 | 236 | 245 | 241 | 243 | 236 | 236 | 227 | 223 | 225 |
| Percentage of Revenues | 3.8 | 4.1 | 4.1 | 4.4 | 4.2 | 5.1 | 4.4 | 4.4 | 4.6 | 4.8 | 4.4 | 4.2 | 4.1 | 4.3 |
| Percentage of Revenues | 3.8 | 4.1 | 4.1 | 4.4 | 4.2 | 5.1 | 4.4 | 4.4 | 4.6 | 4.8 | 4.4 | 4.2 | 4.1 | 4.3 |
| Percentage of Revenues an:ANReportableSegmentPremiumLuxury us-gaap:TransferredOverTime | 100.0 | 100.0 | 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 | 129 | 107 | 95 | 111 | 97 | 109 | 108 | 99 | 98 | 92 | 40 | 35 | 34 | 30 |
| Percentage of Revenues | 1.8 | 1.8 | 1.7 | 2.1 | 2.1 | 2.3 | 2.0 | 1.8 | 1.8 | 1.9 | 0.8 | 0.7 | 0.6 | 0.6 |
| Percentage of Revenues | 1.8 | 1.8 | 1.7 | 2.1 | 2.1 | 2.3 | 2.0 | 1.8 | 1.8 | 1.9 | 0.8 | 0.7 | 0.6 | 0.6 |
| Percentage of Revenues us-gaap:CorporateAndOther us-gaap:TransferredAtPointInTime | 100.0 | 100.0 | 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 | 81 | 76 | 72 | 67 | 59 | 95 | 91 | 90 | 89 | 90 | 85 | 85 | 84 | 84 |
| Percentage of Revenues | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 2.0 | 1.7 | 1.7 | 1.7 | 1.8 | 1.6 | 1.6 | 1.6 | 1.6 |
| Percentage of Revenues | 1.2 | 1.3 | 1.3 | 1.3 | 1.3 | 2.0 | 1.7 | 1.7 | 1.7 | 1.8 | 1.6 | 1.6 | 1.6 | 1.6 |
| Percentage of Revenues us-gaap:CorporateAndOther us-gaap:TransferredOverTime | 100.0 | 100.0 | 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 | 6262 | 5256 | 5146 | 4751 | 4001 | 4001 | 4873 | 4768 | 4650 | 4312 | 4745 | 4681 | 4731 | 4601 |
| Percentage of Revenues | 89.7 | 89.0 | 89.0 | 87.9 | 88.3 | 85.7 | 87.8 | 87.3 | 87.0 | 86.6 | 87.7 | 87.5 | 87.7 | 87.5 |
| Percentage of Revenues | 89.7 | 89.0 | 89.0 | 87.9 | 88.3 | 85.7 | 87.8 | 87.3 | 87.0 | 86.6 | 87.7 | 87.5 | 87.7 | 87.5 |
| Percentage of Revenues us-gaap:TransferredAtPointInTime | 100.0 | 100.0 | 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 | 716 | 647 | 638 | 653 | 531 | 665 | 675 | 692 | 693 | 669 | 666 | 667 | 660 | 658 |
| Percentage of Revenues | 10.3 | 11.0 | 11.0 | 12.1 | 11.7 | 14.3 | 12.2 | 12.7 | 13.0 | 13.4 | 12.3 | 12.5 | 12.3 | 12.5 |
| Percentage of Revenues | 10.3 | 11.0 | 11.0 | 12.1 | 11.7 | 14.3 | 12.2 | 12.7 | 13.0 | 13.4 | 12.3 | 12.5 | 12.3 | 12.5 |
| Percentage of Revenues us-gaap:TransferredOverTime | 100.0 | 100.0 | 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 | 748 | 647 | 632 | 641 | 547 | 600 | 644 | 653 | 637 | 623 | 631 | 626 | 625 | 626 | 622 | 607 | 611 | 595 | 584 | 591 | 585 | 588 | 568 | 568 | 568 | 557 | 532 | 522 | 524 | 500 | 482 | 485 | 494 | 473 | 442 | 435 | 438 | 432 | 412 | 411 | 417 | 407 | 392 | 402 | 383 | 373 |
| 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 Revenues | 10.7 | 11.0 | 10.9 | 11.9 | 12.1 | 12.9 | 11.6 | 12.0 | 11.9 | 12.5 | 11.7 | 11.7 | 11.6 | 11.9 | 10.9 | 11.2 | 11.6 | 11.6 | 10.7 | 10.6 | 10.8 | 11.5 | 10.6 | 10.6 | 10.9 | 11.3 | 10.5 | 10.6 | 11.0 | 11.5 | 10.7 | 10.9 | 11.2 | 11.6 | 10.6 | 11.1 | 11.2 | 11.8 | 11.2 | 11.7 | 12.5 | 12.3 | 12.1 | 12.3 | 12.3 | 13.2 |
| 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 | 2009-12-31 |
| Value | 8381 | 9267 | 9887 | 9569 | 9448 | 10552 | 10543 | 10451 | 10699 | 10914 | 10665 | 10119 | 10288 | 10220 | 10271 | 9954 | 10149 | 10092 | 10060 | 9687 | 9788 | 9997 | 9558 | 8851 | 8839 | 8438 | 8399 | 7793 | 7871 | 7744 | 7914 | 7374 | 7453 | 7194 | 7203 | 6563 | 6461 | 6332 | 6198 | 5766 | 5935 | 5889 | 5974 | 5407 |
| 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 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 |
| Value | 2130 | 2483 | 2684 | 2563 | 2742 | 2573 | 2187 | 2143 | 1895 |
| Percentage of Assets | 21.5 | 23.6 | 25.2 | 25.0 | 27.3 | 26.9 | 26.0 | 27.1 | 26.3 |
| Percentage of Assets | 21.5 | 23.6 | 25.2 | 25.0 | 27.3 | 26.9 | 26.0 | 27.1 | 26.3 |
| Percentage of Assets an:ANReportableSegmentDomestic | 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 | 1764 | 1842 | 1934 | 1992 | 2065 | 2145 | 1997 | 2030 | 1787 |
| Percentage of Assets | 17.8 | 17.5 | 18.1 | 19.4 | 20.5 | 22.4 | 23.8 | 25.7 | 24.8 |
| Percentage of Assets | 17.8 | 17.5 | 18.1 | 19.4 | 20.5 | 22.4 | 23.8 | 25.7 | 24.8 |
| Percentage of Assets an:ANReportableSegmentImport | 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 | 2752 | 3150 | 3046 | 2716 | 2603 | 2554 | 2051 | 1633 | 1541 |
| Percentage of Assets | 27.8 | 29.9 | 28.6 | 26.4 | 25.9 | 26.7 | 24.4 | 20.6 | 21.4 |
| Percentage of Assets | 27.8 | 29.9 | 28.6 | 26.4 | 25.9 | 26.7 | 24.4 | 20.6 | 21.4 |
| Percentage of Assets an:ANReportableSegmentPremiumLuxury | 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 |
| Value | 3240 | 3067 | 2999 | 2998 |
| Percentage of Assets | 32.8 | 29.1 | 28.1 | 29.2 |
| Percentage of Assets | 32.8 | 29.1 | 28.1 | 29.2 |
| Percentage of Assets us-gaap:CorporateAndOther | 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 | 8381 | 9267 | 9887 | 9569 | 9448 | 10552 | 10543 | 10451 | 10699 | 10914 | 10665 | 10119 | 10288 | 10220 | 10271 | 9954 | 10149 | 10092 | 10060 | 9687 | 9788 | 9997 | 9558 | 8851 | 8839 | 8438 | 8399 | 7793 | 7871 | 7744 | 7914 | 7374 | 7453 | 7194 | 7203 | 6563 | 6461 | 6332 | 6198 | 5766 | 5935 | 5889 | 5974 | 5407 |
| 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 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 2856 | 3193 | 3235 | 3357 | 3137 | 2846 | 3162 | 2996 | 2882 | 2785 | 2716 | 2618 | 2500 | 2471 | 2369 | 2200 | 2498 | 2434 | 2310 | 2220 | 2158 | 2090 | 2349 | 2264 | 2285 | 2205 | 2072 | 2012 | 2125 | 2068 | 2061 | 1993 | 1882 | 1786 | 1688 | 1638 | 1528 | 1568 | 1894 | 2024 | 2116 | 2138 | 2078 | 2303 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 34.1 | 34.5 | 32.7 | 35.1 | 33.2 | 27.0 | 30.0 | 28.7 | 26.9 | 25.5 | 25.5 | 25.9 | 24.3 | 24.2 | 23.1 | 22.1 | 24.6 | 24.1 | 23.0 | 22.9 | 22.0 | 20.9 | 24.6 | 25.6 | 25.9 | 26.1 | 24.7 | 25.8 | 27.0 | 26.7 | 26.1 | 27.0 | 25.3 | 24.8 | 23.4 | 25.0 | 23.7 | 24.8 | 30.6 | 35.1 | 35.6 | 36.3 | 34.8 | 42.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 5.7 | 41 | 53 | 41 | 29 | 18 | 35 | 34 | 25 | 24 | 20 | 19 | 18 | 16 | 4.0 | 30 | 27 | 17 | 18 | 18 | 17 | 15 | 5.2 | 78 | 73 | 66 | 61 | 55 | 53 | 43 | 42 | 38 | 34 | 28 | 26 | 24 | 27 | 20 | 19 | 18 | 18 | 2.0 | 480 | 481 |
| Percentage of StockholdersEquity | 0.2 | 1.3 | 1.6 | 1.2 | 0.9 | 0.7 | 1.1 | 1.1 | 0.9 | 0.9 | 0.8 | 0.8 | 0.8 | 0.7 | 0.2 | 1.4 | 1.1 | 0.7 | 0.8 | 0.8 | 0.8 | 0.7 | 0.2 | 3.5 | 3.2 | 3.0 | 3.0 | 2.8 | 2.5 | 2.1 | 2.1 | 1.9 | 1.9 | 1.6 | 1.6 | 1.5 | 1.8 | 1.3 | 1.0 | 0.9 | 0.9 | 0.1 | 20.8 | 0.0 |
| Percentage of Assets | 0.1 | 0.4 | 0.5 | 0.4 | 0.3 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.0 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.0 | 8.9 | 0.0 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 0.8 | 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 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.9 | 1.9 |
| Percentage of StockholdersEquity | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.1 | 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 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 3896 | 4308 | 4069 | 3917 | 3735 | 3455 | 3688 | 3530 | 3431 | 3330 | 3238 | 3145 | 3033 | 2936 | 2832 | 3416 | 3319 | 3231 | 3133 | 3018 | 2910 | 2798 | 2702 | 4101 | 3983 | 3868 | 3756 | 3639 | 3533 | 3433 | 3337 | 3228 | 3135 | 3046 | 2963 | 2879 | 2798 | 2719 | 2646 | 2577 | 2506 | 2365 | 2221 | 2023 |
| Percentage of StockholdersEquity | 136.4 | 134.9 | 125.8 | 116.7 | 119.0 | 121.4 | 116.6 | 117.8 | 119.0 | 119.5 | 119.2 | 120.2 | 121.3 | 118.8 | 119.5 | 155.3 | 132.8 | 132.7 | 135.6 | 135.9 | 134.9 | 133.9 | 115.0 | 181.1 | 174.3 | 175.4 | 181.3 | 180.9 | 166.3 | 165.9 | 161.9 | 162.0 | 166.6 | 170.5 | 175.5 | 175.8 | 183.1 | 173.4 | 139.7 | 127.3 | 118.4 | 113.8 | 96.4 | 0.0 |
| Percentage of Assets | 46.5 | 46.5 | 41.2 | 40.9 | 39.5 | 32.7 | 35.0 | 33.8 | 32.1 | 30.5 | 30.4 | 31.1 | 29.5 | 28.7 | 27.6 | 34.3 | 32.7 | 32.0 | 31.1 | 31.2 | 29.7 | 28.0 | 28.3 | 46.3 | 45.1 | 45.8 | 44.7 | 46.7 | 44.9 | 44.3 | 42.2 | 43.8 | 42.1 | 42.3 | 41.1 | 43.9 | 43.3 | 42.9 | 42.7 | 44.7 | 42.2 | 39.6 | 41.1 | 0.0 |
| Percentage of Assets us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | -1046.1 | -1156.9 | -887.8 | -602.3 | -628.1 | -628.3 | -563.1 | -569.0 | -574.8 | -570.2 | -544.1 | -548.3 | -552.9 | -481.2 | -467.9 | -1247.4 | -849.4 | -815.3 | -842.4 | -816.4 | -771.3 | -724.5 | -359.9 | -1917.1 | -1773.4 | -1731.0 | -1747.9 | -1685.1 | -1463.7 | -1409.1 | -1320.6 | -1275.5 | -1289.9 | -1289.0 | -1302.7 | -1267.5 | -1298.6 | -1173.8 | -773.2 | -571.9 | -410.7 | -289.9 | -399.9 | -307.9 |
| Percentage of StockholdersEquity | -36.6 | -36.2 | -27.4 | -17.9 | -20.0 | -22.1 | -17.8 | -19.0 | -19.9 | -20.5 | -20.0 | -20.9 | -22.1 | -19.5 | -19.7 | -56.7 | -34.0 | -33.5 | -36.5 | -36.8 | -35.7 | -34.7 | -15.3 | -84.6 | -77.6 | -78.5 | -84.4 | -83.8 | -68.9 | -68.1 | -64.1 | -64.0 | -68.5 | -72.1 | -77.2 | -77.4 | -85.0 | -74.9 | -40.8 | -28.2 | -19.4 | -13.9 | -17.4 | 0.0 |
| Percentage of Assets | -12.5 | -12.5 | -9.0 | -6.3 | -6.6 | -6.0 | -5.3 | -5.4 | -5.4 | -5.2 | -5.1 | -5.4 | -5.4 | -4.7 | -4.6 | -12.5 | -8.4 | -8.1 | -8.4 | -8.4 | -7.9 | -7.2 | -3.8 | -21.7 | -20.1 | -20.5 | -20.8 | -21.6 | -18.6 | -18.2 | -16.7 | -17.3 | -17.3 | -17.9 | -18.1 | -19.3 | -20.1 | -18.5 | -12.5 | -9.9 | -6.9 | -4.9 | -7.4 | 0.0 |
| Percentage of Assets us-gaap:TreasuryStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2801 | 3666 | 4152 | 3654 | 3520 | 4748 | 4411 | 4398 | 4663 | 4831 | 4884 | 4437 | 4703 | 4646 | 4797 | 4450 | 4646 | 4676 | 4714 | 4421 | 4663 | 4872 | 4711 | 4251 | 4273 | 3985 | 3999 | 3606 | 3728 | 3637 | 3830 | 3358 | 3506 | 3340 | 3361 | 2958 | 2883 | 2781 | 2676 | 2296 | 2489 | 2450 | 2629 | 2268 |
| Percentage of AssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 33.4 | 39.6 | 42.0 | 38.2 | 37.3 | 45.0 | 41.8 | 42.1 | 43.6 | 44.3 | 45.8 | 43.9 | 45.7 | 45.5 | 46.7 | 44.7 | 45.8 | 46.3 | 46.9 | 45.6 | 47.6 | 48.7 | 49.3 | 48.0 | 48.3 | 47.2 | 47.6 | 46.3 | 47.4 | 47.0 | 48.4 | 45.5 | 47.0 | 46.4 | 46.7 | 45.1 | 44.6 | 43.9 | 43.2 | 39.8 | 41.9 | 41.6 | 44.0 | 42.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 59 | 350 | 569 | 350 | 257 | 411 | 42 | 45 | 51 | 48 | 48 | 52 | 53 | 57 | 69 | 53 | 52 | 56 | 64 | 62 | 54 | 47 | 74 | 63 | 65 | 74 | 75 | 67 | 68 | 69 | 69 | 68 | 69 | 46 | 69 | 98 | 62 | 76 | 86 | 67 | 81 | 84 | 95 | 84 | 101 | 160 | 173 | 110 | 33 |
| 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 | 0.7 | 3.8 | 5.8 | 3.7 | 2.7 | 3.9 | 0.4 | 0.4 | 0.5 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.5 | 0.8 | 0.7 | 0.7 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 0.6 | 1.0 | 1.5 | 1.0 | 1.2 | 1.4 | 1.2 | 1.4 | 1.4 | 1.6 | 0.0 | 0.0 | 0.0 | 3.2 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2015-12-31 |
| Value | 59 | 350 | 569 | 350 | 257 | 411 | 42 | 45 | 51 | 49 | 49 | 53 | 53 | 58 | 71 | 56 | 55 | 57 | 65 | 78 |
| 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 | 0.7 | 3.8 | 5.8 | 3.7 | 2.7 | 3.9 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 | 0.6 | 0.5 | 0.6 | 0.7 | 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 | 2018-01-01 |
| Value | 572 | 650 | 595 | 477 | 493 | 324 | 662 | 571 | 553 | 567 | 706 | 569 | 625 | 671 | 854 |
| Percentage of AccountsReceivableNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 6.8 | 7.0 | 6.0 | 5.0 | 5.2 | 3.1 | 6.3 | 5.5 | 5.2 | 5.2 | 6.6 | 5.6 | 6.1 | 6.6 | 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 | 773 | 883 | 845 | 682 | 673 | 512 | 916 | 829 | 780 | 782 | 976 | 800 | 854 | 883 | 1111 | 901 | 795 | 830 | 1032 | 788 | 817 | 767 | 908 | 758 | 770 | 778 | 817 | 651 | 691 | 663 | 740 | 599 | 621 | 590 | 698 | 514 | 538 | 518 | 587 | 402 | 404 | 425 | 462 | 406 |
| Percentage of ReceivablesNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 9.2 | 9.5 | 8.5 | 7.1 | 7.1 | 4.9 | 8.7 | 7.9 | 7.3 | 7.2 | 9.2 | 7.9 | 8.3 | 8.6 | 10.8 | 9.1 | 7.8 | 8.2 | 10.3 | 8.1 | 8.3 | 7.7 | 9.5 | 8.6 | 8.7 | 9.2 | 9.7 | 8.4 | 8.8 | 8.6 | 9.4 | 8.1 | 8.3 | 8.2 | 9.7 | 7.8 | 8.3 | 8.2 | 9.5 | 7.0 | 6.8 | 7.2 | 7.7 | 7.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 1756 | 2254 | 2598 | 2482 | 2432 | 3677 | 3305 | 3280 | 3517 | 3771 | 3650 | 3381 | 3587 | 3529 | 3365 | 3408 | 3713 | 3692 | 3520 | 3448 | 3661 | 3927 | 3612 | 3226 | 3230 | 2928 | 2899 | 2691 | 2776 | 2712 | 2827 | 2504 | 2625 | 2499 | 2396 | 2142 | 2077 | 1984 | 1809 | 1601 | 1780 | 1731 | 1867 | 1392 |
| Percentage of InventoryNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 21.0 | 24.3 | 26.3 | 25.9 | 25.7 | 34.8 | 31.4 | 31.4 | 32.9 | 34.6 | 34.2 | 33.4 | 34.9 | 34.5 | 32.8 | 34.2 | 36.6 | 36.6 | 35.0 | 35.6 | 37.4 | 39.3 | 37.8 | 36.5 | 36.5 | 34.7 | 34.5 | 34.5 | 35.3 | 35.0 | 35.7 | 34.0 | 35.2 | 34.7 | 33.3 | 32.6 | 32.2 | 31.3 | 29.2 | 27.8 | 30.0 | 29.4 | 31.3 | 25.8 |
| 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 |
| Value | 637 | 1363 | 1761 | 1634 | 1716 | 2840 | 2490 | 2482 | 2733 | 3040 | 2874 | 2651 | 2881 | 2812 | 2577 | 2651 | 2957 | 2931 | 2761 | 2645 | 2882 | 3186 | 2888 | 2543 | 2565 | 2291 | 2294 | 2139 | 2202 | 2208 | 2330 |
| Percentage of InventoryNet | 36.3 | 60.5 | 67.8 | 65.9 | 70.6 | 77.3 | 75.3 | 75.7 | 77.7 | 80.6 | 78.8 | 78.4 | 80.3 | 79.7 | 76.6 | 77.8 | 79.6 | 79.4 | 78.4 | 76.7 | 78.7 | 81.1 | 80.0 | 78.8 | 79.4 | 78.3 | 79.1 | 79.5 | 79.3 | 81.4 | 82.4 |
| Percentage of Assets | 7.6 | 14.7 | 17.8 | 17.1 | 18.2 | 26.9 | 23.6 | 23.7 | 25.6 | 27.9 | 27.0 | 26.2 | 28.0 | 27.5 | 25.1 | 26.6 | 29.1 | 29.0 | 27.5 | 27.3 | 29.4 | 31.9 | 30.2 | 28.7 | 29.0 | 27.2 | 27.3 | 27.5 | 28.0 | 28.5 | 29.5 |
| Percentage of Assets an:NewVehicle | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 195 | 192 | 188 | 189 | 221 | 235 | 245 | 237 | 237 | 236 | 221 | 212 | 212 | 213 | 211 | 201 | 202 | 198 | 199 | 196 | 192 | 190 | 184 | 172 | 171 | 166 | 167 |
| Percentage of InventoryNet | 11.1 | 8.5 | 7.2 | 7.6 | 9.1 | 6.4 | 7.4 | 7.2 | 6.8 | 6.3 | 6.1 | 6.3 | 5.9 | 6.1 | 6.3 | 5.9 | 5.5 | 5.4 | 5.7 | 5.7 | 5.2 | 4.8 | 5.1 | 5.3 | 5.3 | 5.7 | 5.8 |
| Percentage of Assets | 2.3 | 2.1 | 1.9 | 2.0 | 2.3 | 2.2 | 2.3 | 2.3 | 2.2 | 2.2 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 1.9 | 1.9 | 1.9 | 1.9 | 2.0 | 2.0 |
| Percentage of Assets an:PartsAndService | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 923 | 698 | 648 | 658 | 493 | 600 | 570 | 561 | 546 | 494 | 553 | 517 | 493 | 503 | 576 | 555 | 553 | 562 | 559 | 606 | 587 | 551 | 539 | 511 | 494 | 470 | 437 | 394 | 420 | 355 | 346 |
| Percentage of InventoryNet | 52.6 | 31.0 | 25.0 | 26.5 | 20.3 | 16.3 | 17.2 | 17.1 | 15.5 | 13.1 | 15.2 | 15.3 | 13.8 | 14.3 | 17.1 | 16.3 | 14.9 | 15.2 | 15.9 | 17.6 | 16.0 | 14.0 | 14.9 | 15.9 | 15.3 | 16.1 | 15.1 | 14.7 | 15.1 | 13.1 | 12.3 |
| Percentage of Assets | 11.0 | 7.5 | 6.6 | 6.9 | 5.2 | 5.7 | 5.4 | 5.4 | 5.1 | 4.5 | 5.2 | 5.1 | 4.8 | 4.9 | 5.6 | 5.6 | 5.5 | 5.6 | 5.6 | 6.3 | 6.0 | 5.5 | 5.6 | 5.8 | 5.6 | 5.6 | 5.2 | 5.1 | 5.3 | 4.6 | 4.4 |
| Percentage of Assets an:UsedVehicle | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 212 | 178 | 139 | 139 | 157 | 147 | 146 | 243 | 313 | 229 | 208 | 203 | 209 | 177 | 251 | 87 | 85 | 97 | 97 | 123 | 130 | 129 | 117 | 202 | 207 | 204 | 207 | 196 | 191 | 192 | 192 | 186 | 190 | 204 | 196 | 203 | 205 | 202 | 193 | 224 | 222 | 209 | 205 | 295 |
| Percentage of OtherAssetsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 2.5 | 1.9 | 1.4 | 1.5 | 1.7 | 1.4 | 1.4 | 2.3 | 2.9 | 2.1 | 2.0 | 2.0 | 2.0 | 1.7 | 2.5 | 0.9 | 0.8 | 1.0 | 1.0 | 1.3 | 1.3 | 1.3 | 1.2 | 2.3 | 2.3 | 2.4 | 2.5 | 2.5 | 2.4 | 2.5 | 2.4 | 2.5 | 2.6 | 2.8 | 2.7 | 3.1 | 3.2 | 3.2 | 3.1 | 3.9 | 3.8 | 3.6 | 3.4 | 5.5 |
| 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 |
| Value | 4791 | 4655 | 4488 | 4173 | 3936 | 3677 | 3352 | 3119 | 2921 | 2707 | 2527 |
| 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 |
| Percentage of Assets | 48.5 | 44.2 | 42.1 | 40.6 | 39.1 | 38.5 | 39.9 | 39.4 | 40.6 | 43.7 | 42.3 |
| 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 |
| Value | 1040 | 973 | 807 | 720 | 659 | 642 | 578 | 569 | 545 | 518 | 479 |
| Percentage of PropertyPlantAndEquipmentGross | 21.7 | 20.9 | 18.0 | 17.3 | 16.8 | 17.5 | 17.3 | 18.3 | 18.7 | 19.2 | 19.0 |
| Percentage of Assets | 10.5 | 9.2 | 7.6 | 7.0 | 6.6 | 6.7 | 6.9 | 7.2 | 7.6 | 8.4 | 8.0 |
| Percentage of Assets an:FurnitureFixturesAndEquipment | 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 |
| Value | 2333 | 2306 | 2320 | 2121 | 2009 | 1856 | 1683 | 1552 | 1451 | 1321 | 1210 |
| Percentage of PropertyPlantAndEquipmentGross | 48.7 | 49.5 | 51.7 | 50.8 | 51.1 | 50.5 | 50.2 | 49.8 | 49.7 | 48.8 | 47.9 |
| Percentage of Assets | 23.6 | 21.9 | 21.8 | 20.7 | 20.0 | 19.4 | 20.0 | 19.6 | 20.2 | 21.3 | 20.3 |
| Percentage of Assets us-gaap:BuildingAndBuildingImprovements | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 1417 | 1376 | 1360 | 1332 | 1267 | 1178 | 1090 | 997 | 924 | 867 | 837 |
| Percentage of PropertyPlantAndEquipmentGross | 29.6 | 29.6 | 30.3 | 31.9 | 32.2 | 32.0 | 32.5 | 32.0 | 31.6 | 32.0 | 33.1 |
| Percentage of Assets | 14.3 | 13.1 | 12.8 | 13.0 | 12.6 | 12.3 | 13.0 | 12.6 | 12.8 | 14.0 | 14.0 |
| Percentage of Assets us-gaap:Land | 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 |
| Value | 1700 | 1700 | 1652 | 1600 | 1600 | 1500 | 1481 | 1400 | 1400 | 1400 | 1332 | 1300 | 1300 | 1200 | 1211 | 1200 | 1200 | 1100 | 1093 | 1100 | 1055 | 1040 | 1009 | 981 | 985 | 951 | 930 | 942 | 925 | 901 | 883 | 879 | 870 | 853 | 826 | 813 | 792 | 773 | 756 | 738 | 723 | 708 | 689 |
| 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 |
| Percentage of Assets | 20.3 | 18.3 | 16.7 | 16.7 | 16.9 | 14.2 | 14.0 | 13.4 | 13.1 | 12.8 | 12.5 | 12.8 | 12.6 | 11.7 | 11.8 | 12.1 | 11.8 | 10.9 | 10.9 | 11.4 | 10.8 | 10.4 | 10.6 | 11.1 | 11.1 | 11.3 | 11.1 | 12.1 | 11.8 | 11.6 | 11.2 | 11.9 | 11.7 | 11.9 | 11.5 | 12.4 | 12.3 | 12.2 | 12.2 | 12.8 | 12.2 | 12.0 | 11.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 3094 | 3107 | 3138 | 3125 | 3143 | 3164 | 3174 | 3130 | 3115 | 3129 | 3155 | 3085 | 3023 | 3000 | 2962 | 2949 | 2950 | 2897 | 2843 | 2807 | 2772 | 2768 | 2667 | 2494 | 2489 | 2433 | 2422 | 2293 | 2272 | 2244 | 2235 | 2186 | 2122 | 2102 | 2095 | 2007 | 1987 | 1960 | 1950 | 1919 | 1884 | 1880 | 1838 | 1713 |
| 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 |
| Percentage of Assets | 36.9 | 33.5 | 31.7 | 32.7 | 33.3 | 30.0 | 30.1 | 30.0 | 29.1 | 28.7 | 29.6 | 30.5 | 29.4 | 29.4 | 28.8 | 29.6 | 29.1 | 28.7 | 28.3 | 29.0 | 28.3 | 27.7 | 27.9 | 28.2 | 28.2 | 28.8 | 28.8 | 29.4 | 28.9 | 29.0 | 28.2 | 29.7 | 28.5 | 29.2 | 29.1 | 30.6 | 30.8 | 31.0 | 31.5 | 33.3 | 31.7 | 31.9 | 30.8 | 31.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 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 | 1187 | 1184 | 1185 | 1186 | 1181 | 1183 | 1501 | 1498 | 1497 | 1509 | 1513 | 1516 | 1508 | 1513 | 1515 | 1529 | 1527 | 1515 | 1511 | 1492 | 1427 | 1437 | 1394 | 1346 | 1341 | 1321 | 1314 | 1265 | 1257 | 1257 | 1259 | 1254 | 1253 | 1233 | 1237 | 1172 | 1172 | 1172 | 1172 | 1172 | 1172 | 1171 | 1142 | 1122 |
| 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 |
| Percentage of Assets | 14.2 | 12.8 | 12.0 | 12.4 | 12.5 | 11.2 | 14.2 | 14.3 | 14.0 | 13.8 | 14.2 | 15.0 | 14.7 | 14.8 | 14.7 | 15.4 | 15.1 | 15.0 | 15.0 | 15.4 | 14.6 | 14.4 | 14.6 | 15.2 | 15.2 | 15.7 | 15.7 | 16.2 | 16.0 | 16.2 | 15.9 | 17.0 | 16.8 | 17.1 | 17.2 | 17.9 | 18.1 | 18.5 | 18.9 | 20.3 | 19.7 | 19.9 | 19.1 | 20.8 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 227 | 227 | 227 | 227 | 227 | 232 | 231 | 252 |
| Percentage of Goodwill | 19.2 | 19.1 | 19.2 | 19.2 | 15.1 | 15.4 | 15.3 | 16.7 |
| Percentage of Assets | 2.3 | 2.4 | 2.4 | 2.2 | 2.2 | 2.2 | 2.3 | 2.5 |
| Percentage of Assets an:ReportingUnitDomestic | 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 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 500 | 502 | 496 | 498 | 498 | 520 | 532 | 558 |
| Percentage of Goodwill | 42.2 | 42.3 | 42.1 | 42.1 | 33.2 | 34.4 | 35.1 | 36.9 |
| Percentage of Assets | 5.1 | 5.2 | 5.3 | 4.7 | 4.7 | 4.9 | 5.2 | 5.5 |
| Percentage of Assets an:ReportingUnitImport | 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 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 457 | 457 | 457 | 457 | 714 | 717 | 712 | 697 |
| Percentage of Goodwill | 38.6 | 38.5 | 38.7 | 38.7 | 47.6 | 47.4 | 47.0 | 46.1 |
| Percentage of Assets | 4.6 | 4.8 | 4.8 | 4.3 | 6.8 | 6.7 | 6.9 | 6.9 |
| Percentage of Assets an:ReportingUnitPremiumLuxury | 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 | 521 | 521 | 521 | 521 | 522 | 522 | 581 | 582 | 582 | 596 | 595 | 595 | 579 | 587 | 586 | 616 | 615 | 600 | 598 | 581 | 544 | 554 | 439 | 406 | 392 | 369 | 354 | 339 | 335 | 334 | 335 | 326 | 328 | 289 | 291 | 213 | 213 | 217 | 217 | 218 | 217 | 216 | 202 | 174 |
| 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 | 6.2 | 5.6 | 5.3 | 5.5 | 5.5 | 4.9 | 5.5 | 5.6 | 5.4 | 5.5 | 5.6 | 5.9 | 5.6 | 5.7 | 5.7 | 6.2 | 6.1 | 6.0 | 5.9 | 6.0 | 5.6 | 5.5 | 4.6 | 4.6 | 4.4 | 4.4 | 4.2 | 4.4 | 4.3 | 4.3 | 4.2 | 4.4 | 4.4 | 4.0 | 4.0 | 3.3 | 3.3 | 3.4 | 3.5 | 3.8 | 3.7 | 3.7 | 3.4 | 3.2 |
| 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 |
| Value | 303 | 302 | 309 | 329 | 340 | 333 | 333 | 328 | 336 | 343 | 0.0 |
| Percentage of OperatingLeaseRightOfUseAsset | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 3.6 | 3.3 | 3.1 | 3.4 | 3.6 | 3.2 | 3.2 | 3.1 | 3.1 | 3.1 | 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 | 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 | 473 | 485 | 580 | 752 | 740 | 599 | 541 | 512 | 504 | 503 | 517 | 484 | 474 | 472 | 409 | 409 | 409 | 402 | 392 | 384 | 380 | 364 | 345 | 352 | 343 | 329 | 309 | 289 | 277 | 269 | 254 | 247 | 242 | 228 | 218 | 211 | 205 | 200 | 181 | 161 | 172 | 170 | 163 | 127 |
| Percentage of OtherAssetsNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 5.6 | 5.2 | 5.9 | 7.9 | 7.8 | 5.7 | 5.1 | 4.9 | 4.7 | 4.6 | 4.8 | 4.8 | 4.6 | 4.6 | 4.0 | 4.1 | 4.0 | 4.0 | 3.9 | 4.0 | 3.9 | 3.6 | 3.6 | 4.0 | 3.9 | 3.9 | 3.7 | 3.7 | 3.5 | 3.5 | 3.2 | 3.4 | 3.3 | 3.2 | 3.0 | 3.2 | 3.2 | 3.2 | 2.9 | 2.8 | 2.9 | 2.9 | 2.7 | 2.4 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 101 | 288 |
| Percentage of EquitySecuritiesFvNi | 100.0 | 100.0 |
| Percentage of Assets | 1.0 | 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 | 2009-12-31 |
| Value | 396 | 413 | 335 | 344 | 261 | 225 | 290 | 267 | 264 | 269 | 306 | 274 | 275 | 302 | 309 | 276 | 287 | 308 | 303 | 304 | 288 | 310 | 299 | 282 | 264 | 287 | 264 | 251 | 249 | 253 | 263 | 233 | 225 | 203 | 235 | 218 | 201 | 217 | 202 | 169 | 197 | 211 | 164 | 151 |
| Percentage of AccountsPayableCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.7 | 4.5 | 3.4 | 3.6 | 2.8 | 2.1 | 2.8 | 2.6 | 2.5 | 2.5 | 2.9 | 2.7 | 2.7 | 3.0 | 3.0 | 2.8 | 2.8 | 3.1 | 3.0 | 3.1 | 2.9 | 3.1 | 3.1 | 3.2 | 3.0 | 3.4 | 3.2 | 3.2 | 3.2 | 3.3 | 3.3 | 3.2 | 3.0 | 2.8 | 3.3 | 3.3 | 3.1 | 3.4 | 3.3 | 2.9 | 3.3 | 3.6 | 2.7 | 2.8 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2018-01-01 |
| Value | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 30 | 28 | 26 |
| Percentage of ContractWithCustomerLiabilityCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 3040 | 3609 | 4165 | 3710 | 3821 | 4995 | 5100 | 5195 | 5590 | 5898 | 5658 | 5171 | 5476 | 5433 | 5635 | 6128 | 6108 | 5722 | 5829 | 5397 | 5576 | 5860 | 5169 | 4473 | 4395 | 3855 | 3882 | 3542 | 3568 | 3583 | 3751 | 3280 | 3399 | 3207 | 3201 | 2833 | 2715 | 2661 | 2462 | 2159 | 2211 | 2250 | 2399 | 1863 |
| Percentage of LiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 36.3 | 38.9 | 42.1 | 38.8 | 40.4 | 47.3 | 48.4 | 49.7 | 52.2 | 54.0 | 53.1 | 51.1 | 53.2 | 53.2 | 54.9 | 61.6 | 60.2 | 56.7 | 57.9 | 55.7 | 57.0 | 58.6 | 54.1 | 50.5 | 49.7 | 45.7 | 46.2 | 45.5 | 45.3 | 46.3 | 47.4 | 44.5 | 45.6 | 44.6 | 44.4 | 43.2 | 42.0 | 42.0 | 39.7 | 37.5 | 37.3 | 38.2 | 40.2 | 34.5 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 38 | 41 |
| Percentage of OperatingLeaseLiabilityCurrent | 100.0 | 100.0 |
| Percentage of Assets | 0.4 | 0.4 |
| Percentage of Assets us-gaap:OtherCurrentLiabilities | 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 | 597 | 659 | 535 | 535 | 729 | 642 | 708 | 752 | 730 | 734 | 679 | 688 | 659 | 707 | 774 | 659 | 574 | 615 | 566 | 566 | 515 | 572 | 529 | 530 | 486 | 540 | 495 | 499 | 432 | 474 | 429 | 416 | 396 | 449 | 395 | 386 | 363 | 396 | 348 | 386 | 328 | 377 | 360 | 329 |
| Percentage of OtherLiabilitiesCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 7.1 | 7.1 | 5.4 | 5.6 | 7.7 | 6.1 | 6.7 | 7.2 | 6.8 | 6.7 | 6.4 | 6.8 | 6.4 | 6.9 | 7.5 | 6.6 | 5.7 | 6.1 | 5.6 | 5.8 | 5.3 | 5.7 | 5.5 | 6.0 | 5.5 | 6.4 | 5.9 | 6.4 | 5.5 | 6.1 | 5.4 | 5.6 | 5.3 | 6.3 | 5.5 | 5.9 | 5.6 | 6.3 | 5.6 | 6.7 | 5.5 | 6.4 | 6.0 | 6.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 35 | 32 | 29 | 29 | 27 | 27 | 24 |
| Percentage of OtherLiabilitiesCurrent | 6.6 | 4.6 | 4.4 | 3.8 | 4.8 | 5.1 | 5.0 |
| Percentage of Assets | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Percentage of Assets an:ReservesforSelfInsurance | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1790 | 1791 | 1792 | 1782 | 1783 | 2076 | 1578 | 1575 | 1576 | 1575 | 1926 | 1962 | 1958 | 1958 | 1959 | 1295 | 1216 | 1615 | 1611 | 1769 | 1738 | 1742 | 1753 | 1747 | 1805 | 2030 | 2103 | 1915 | 1865 | 1792 | 1809 | 1826 | 1907 | 1943 | 2066 | 1864 | 2000 | 1887 | 1634 | 1394 | 1433 | 1340 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 21.4 | 19.3 | 18.1 | 18.6 | 18.9 | 19.7 | 15.0 | 15.1 | 14.7 | 14.4 | 18.1 | 19.4 | 19.0 | 19.2 | 19.1 | 13.0 | 12.0 | 16.0 | 16.0 | 18.3 | 17.8 | 17.4 | 18.3 | 19.7 | 20.4 | 24.1 | 25.0 | 24.6 | 23.7 | 23.1 | 22.9 | 24.8 | 25.6 | 27.0 | 28.7 | 28.4 | 31.0 | 29.8 | 26.4 | 24.2 | 24.1 | 22.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 75 | 76 | 95 | 110 | 118 | 66 | 135 | 89 | 71 | 91 | 78 | 69 |
| 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 |
| Percentage of Assets | 0.9 | 0.8 | 1.0 | 1.2 | 1.2 | 0.6 | 1.3 | 0.8 | 0.7 | 0.9 | 0.8 | 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 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 338 | 317 | 310 | 304 | 273 | 260 | 262 | 255 | 249 | 248 | 275 | 281 | 276 | 280 | 235 | 231 | 227 | 224 | 217 | 209 | 218 | 212 | 207 | 204 | 206 | 206 | 204 | 194 | 187 | 180 | 174 | 169 | 166 | 162 | 157 | 148 | 147 | 149 | 144 | 144 | 143 | 141 | 129 | 111 |
| Percentage of OtherLiabilitiesNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 4.0 | 3.4 | 3.1 | 3.2 | 2.9 | 2.5 | 2.5 | 2.4 | 2.3 | 2.3 | 2.6 | 2.8 | 2.7 | 2.7 | 2.3 | 2.3 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.1 | 2.2 | 2.3 | 2.3 | 2.4 | 2.4 | 2.5 | 2.4 | 2.3 | 2.2 | 2.3 | 2.2 | 2.3 | 2.2 | 2.3 | 2.3 | 2.4 | 2.3 | 2.5 | 2.4 | 2.4 | 2.2 | 2.1 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 47 | 48 | 47 | 48 | 48 | 47 | 46 |
| Percentage of OtherLiabilitiesNoncurrent | 15.1 | 18.3 | 17.2 | 20.7 | 22.3 | 22.9 | 22.8 |
| Percentage of Assets | 0.5 | 0.5 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 |
| Percentage of Assets an:ReservesforSelfInsurance | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 |
| Value | 279 | 279 | 286 | 304 | 315 | 306 | 305 | 302 | 308 | 315 | 0.0 |
| Percentage of OperatingLeaseLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Percentage of Assets | 3.3 | 3.0 | 2.9 | 3.2 | 3.3 | 2.9 | 2.9 | 2.9 | 2.9 | 2.9 | 0.0 |
| Period End | 2020-12-31 |
| Value | 48 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo | 100.0 |
| Percentage of Assets | 0.5 |
| Period End | 2020-12-31 |
| Value | 41 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree | 100.0 |
| Percentage of Assets | 0.4 |
| Period End | 2020-12-31 |
| Value | 35 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour | 100.0 |
| Percentage of Assets | 0.4 |
| Period End | 2020-12-31 |
| Value | 33 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive | 100.0 |
| Percentage of Assets | 0.3 |
| Period End | 2020-12-31 |
| Value | 235 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive | 100.0 |
| Percentage of Assets | 2.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 324 | 346 | 342 | 349 | 356 |
| Percentage of OperatingLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 |
| Period End | 2020-12-31 |
| Value | 449 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDue | 100.0 |
| Percentage of Assets | 4.5 |
| Period End | 2020-12-31 |
| Value | 124 |
| Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount | 100.0 |
| Percentage of Assets | 1.3 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2009-12-31 |
| Value | 2856 | 3193 | 3235 | 3357 | 3137 | 2846 | 3162 | 2996 | 2882 | 2785 | 2716 | 2618 | 2500 | 2471 | 2369 | 2200 | 2498 | 2434 | 2310 | 2220 | 2158 | 2090 | 2349 | 2264 | 2285 | 2205 | 2072 | 2012 | 2125 | 2068 | 2061 | 1993 | 1882 | 1786 | 1688 | 1638 | 1528 | 1568 | 1894 | 2024 | 2116 | 2138 | 2078 | 2303 |
| Percentage of StockholdersEquity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 34.1 | 34.5 | 32.7 | 35.1 | 33.2 | 27.0 | 30.0 | 28.7 | 26.9 | 25.5 | 25.5 | 25.9 | 24.3 | 24.2 | 23.1 | 22.1 | 24.6 | 24.1 | 23.0 | 22.9 | 22.0 | 20.9 | 24.6 | 25.6 | 25.9 | 26.1 | 24.7 | 25.8 | 27.0 | 26.7 | 26.1 | 27.0 | 25.3 | 24.8 | 23.4 | 25.0 | 23.7 | 24.8 | 30.6 | 35.1 | 35.6 | 36.3 | 34.8 | 42.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 5.7 | 41 | 53 | 41 | 29 | 18 | 35 | 34 | 25 | 24 | 20 | 19 | 18 | 16 | 4.0 | 30 | 27 | 17 | 18 | 18 | 17 | 15 | 5.2 | 78 | 73 | 66 | 61 | 55 | 53 | 43 | 42 | 38 | 34 | 28 | 26 | 24 | 27 | 20 | 19 | 18 | 18 | 2.0 | 480 | 481 |
| Percentage of StockholdersEquity | 0.2 | 1.3 | 1.6 | 1.2 | 0.9 | 0.7 | 1.1 | 1.1 | 0.9 | 0.9 | 0.8 | 0.8 | 0.8 | 0.7 | 0.2 | 1.4 | 1.1 | 0.7 | 0.8 | 0.8 | 0.8 | 0.7 | 0.2 | 3.5 | 3.2 | 3.0 | 3.0 | 2.8 | 2.5 | 2.1 | 2.1 | 1.9 | 1.9 | 1.6 | 1.6 | 1.5 | 1.8 | 1.3 | 1.0 | 0.9 | 0.9 | 0.1 | 20.8 | 0.0 |
| Percentage of Assets | 0.1 | 0.4 | 0.5 | 0.4 | 0.3 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.0 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.0 | 8.9 | 0.0 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 0.8 | 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 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.9 | 1.9 |
| Percentage of StockholdersEquity | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.1 | 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 | 0.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | 3896 | 4308 | 4069 | 3917 | 3735 | 3455 | 3688 | 3530 | 3431 | 3330 | 3238 | 3145 | 3033 | 2936 | 2832 | 3416 | 3319 | 3231 | 3133 | 3018 | 2910 | 2798 | 2702 | 4101 | 3983 | 3868 | 3756 | 3639 | 3533 | 3433 | 3337 | 3228 | 3135 | 3046 | 2963 | 2879 | 2798 | 2719 | 2646 | 2577 | 2506 | 2365 | 2221 | 2023 |
| Percentage of StockholdersEquity | 136.4 | 134.9 | 125.8 | 116.7 | 119.0 | 121.4 | 116.6 | 117.8 | 119.0 | 119.5 | 119.2 | 120.2 | 121.3 | 118.8 | 119.5 | 155.3 | 132.8 | 132.7 | 135.6 | 135.9 | 134.9 | 133.9 | 115.0 | 181.1 | 174.3 | 175.4 | 181.3 | 180.9 | 166.3 | 165.9 | 161.9 | 162.0 | 166.6 | 170.5 | 175.5 | 175.8 | 183.1 | 173.4 | 139.7 | 127.3 | 118.4 | 113.8 | 96.4 | 0.0 |
| Percentage of Assets | 46.5 | 46.5 | 41.2 | 40.9 | 39.5 | 32.7 | 35.0 | 33.8 | 32.1 | 30.5 | 30.4 | 31.1 | 29.5 | 28.7 | 27.6 | 34.3 | 32.7 | 32.0 | 31.1 | 31.2 | 29.7 | 28.0 | 28.3 | 46.3 | 45.1 | 45.8 | 44.7 | 46.7 | 44.9 | 44.3 | 42.2 | 43.8 | 42.1 | 42.3 | 41.1 | 43.9 | 43.3 | 42.9 | 42.7 | 44.7 | 42.2 | 39.6 | 41.1 | 0.0 |
| Percentage of Assets us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 | 2009-12-31 | 2008-12-31 |
| Value | -1046.1 | -1156.9 | -887.8 | -602.3 | -628.1 | -628.3 | -563.1 | -569.0 | -574.8 | -570.2 | -544.1 | -548.3 | -552.9 | -481.2 | -467.9 | -1247.4 | -849.4 | -815.3 | -842.4 | -816.4 | -771.3 | -724.5 | -359.9 | -1917.1 | -1773.4 | -1731.0 | -1747.9 | -1685.1 | -1463.7 | -1409.1 | -1320.6 | -1275.5 | -1289.9 | -1289.0 | -1302.7 | -1267.5 | -1298.6 | -1173.8 | -773.2 | -571.9 | -410.7 | -289.9 | -399.9 | -307.9 |
| Percentage of StockholdersEquity | -36.6 | -36.2 | -27.4 | -17.9 | -20.0 | -22.1 | -17.8 | -19.0 | -19.9 | -20.5 | -20.0 | -20.9 | -22.1 | -19.5 | -19.7 | -56.7 | -34.0 | -33.5 | -36.5 | -36.8 | -35.7 | -34.7 | -15.3 | -84.6 | -77.6 | -78.5 | -84.4 | -83.8 | -68.9 | -68.1 | -64.1 | -64.0 | -68.5 | -72.1 | -77.2 | -77.4 | -85.0 | -74.9 | -40.8 | -28.2 | -19.4 | -13.9 | -17.4 | 0.0 |
| Percentage of Assets | -12.5 | -12.5 | -9.0 | -6.3 | -6.6 | -6.0 | -5.3 | -5.4 | -5.4 | -5.2 | -5.1 | -5.4 | -5.4 | -4.7 | -4.6 | -12.5 | -8.4 | -8.1 | -8.4 | -8.4 | -7.9 | -7.2 | -3.8 | -21.7 | -20.1 | -20.5 | -20.8 | -21.6 | -18.6 | -18.2 | -16.7 | -17.3 | -17.3 | -17.9 | -18.1 | -19.3 | -20.1 | -18.5 | -12.5 | -9.9 | -6.9 | -4.9 | -7.4 | 0.0 |
| Percentage of Assets us-gaap:TreasuryStock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 800000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1000000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1200000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1600000.0 | 1900000.0 |
| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 5.7 | 41 | 53 | 41 | 29 | 18 | 35 | 34 | 25 | 24 | 20 | 19 | 18 | 16 | 4.0 | 30 | 27 | 17 | 18 | 18 | 17 | 15 | 5.2 | 78 | 73 | 66 | 61 | 55 | 53 | 43 | 42 | 38 | 34 | 28 | 26 | 24 | 27 | 20 | 19 | 18 | 18 | 11 | 2.0 | 480 |
| 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 | 0.1 | 0.4 | 0.5 | 0.4 | 0.3 | 0.2 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.0 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.9 | 0.8 | 0.8 | 0.7 | 0.7 | 0.7 | 0.6 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | 0.0 | 8.9 |
| 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 | 2009-12-31 |
| Value | 3896 | 4308 | 4069 | 3917 | 3735 | 3455 | 3688 | 3530 | 3431 | 3330 | 3238 | 3145 | 3033 | 2936 | 2832 | 3416 | 3319 | 3231 | 3133 | 3018 | 2910 | 2798 | 2702 | 4101 | 3983 | 3868 | 3756 | 3639 | 3533 | 3433 | 3337 | 3228 | 3135 | 3046 | 2963 | 2879 | 2798 | 2719 | 2646 | 2577 | 2506 | 2434 | 2365 | 2221 |
| 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 | 46.5 | 46.5 | 41.2 | 40.9 | 39.5 | 32.7 | 35.0 | 33.8 | 32.1 | 30.5 | 30.4 | 31.1 | 29.5 | 28.7 | 27.6 | 34.3 | 32.7 | 32.0 | 31.1 | 31.2 | 29.7 | 28.0 | 28.3 | 46.3 | 45.1 | 45.8 | 44.7 | 46.7 | 44.9 | 44.3 | 42.2 | 43.8 | 42.1 | 42.3 | 41.1 | 43.9 | 43.3 | 42.9 | 42.7 | 44.7 | 42.2 | 41.3 | 39.6 | 41.1 |
| 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 | 1046 | 1156 | 887 | 602 | 628 | 628 | 563 | 569 | 574 | 570 | 544 | 548 | 552 | 481 | 467 | 1247 | 849 | 815 | 842 | 816 | 771 | 724 | 359 | 1917 | 1773 | 1731 | 1747 | 1685 | 1463 | 1409 | 1320 | 1275 | 1289 | 1289 | 1302 | 1267 | 1298 | 1173 | 773 | 571 | 410 | 308 | 289 | 399 |
| Percentage of TreasuryStockValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 12.5 | 12.5 | 9.0 | 6.3 | 6.6 | 6.0 | 5.3 | 5.4 | 5.4 | 5.2 | 5.1 | 5.4 | 5.4 | 4.7 | 4.6 | 12.5 | 8.4 | 8.1 | 8.4 | 8.4 | 7.9 | 7.2 | 3.8 | 21.7 | 20.1 | 20.5 | 20.8 | 21.6 | 18.6 | 18.2 | 16.7 | 17.3 | 17.3 | 17.9 | 18.1 | 19.3 | 20.1 | 18.5 | 12.5 | 9.9 | 6.9 | 5.2 | 4.9 | 7.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 6.5 | 20 | 7.2 | 11 | 4.5 | 9.5 | 4.9 | 13 | 3.5 | 3.6 | 4.1 | 14 | 2.5 | 2.6 | 10 | 4.6 | 2.6 | 3.1 | 4.1 | 15 | 2.8 | 3.8 | 6.3 | 11 | 4.8 | 4.2 | 10.0 | 7.3 | 4.0 | 4.5 | 6.1 | 6.7 | 3.4 | 4.0 | 5.4 | 5.8 | 2.7 | 4.2 | 5.6 | 5.9 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 6.5 | 20 | 7.2 | 11 | 4.5 | 9.5 | 4.9 | 13 | 3.5 | 3.6 | 4.1 | 14 | 2.5 | 2.6 | 10 | 4.6 | 2.6 | 3.1 | 4.1 | 15 | 2.8 | 3.8 | 6.3 | 11 | 4.8 | 4.2 | 10.0 | 7.3 | 4.0 | 4.5 | 6.1 | 6.7 | 3.4 | 4.0 | 5.4 | 5.8 | 2.7 | 4.2 | 5.6 | 5.9 |
| Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of Assets us-gaap:AdditionalPaidInCapital | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 404 | 526 | 43 | 270 | 780 | 113 | 103 | 240 | 165 | 259 | -24.1 | 244 | 92 | 198 | 83 | 218 | 53 | 185 | 37 | 250 | 30 | 198 | 31 | 233 | 42 | 199 | 32 | 242 | -4.7 | 215 | 15 | 189 | 43 | 235 | 4.9 | 192 | 19 | 100 | 65 | 186 | -28.4 | 153 | 54 | 65 | 63 | 69 |
| 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 Revenues | 5.8 | 8.9 | 0.7 | 5.0 | 17.2 | 2.4 | 1.9 | 4.4 | 3.1 | 5.2 | -0.4 | 4.6 | 1.7 | 3.8 | 1.5 | 4.0 | 1.0 | 3.6 | 0.7 | 4.5 | 0.6 | 3.9 | 0.6 | 4.4 | 0.8 | 4.0 | 0.6 | 4.9 | -0.1 | 4.9 | 0.3 | 4.2 | 1.0 | 5.7 | 0.1 | 4.9 | 0.5 | 2.7 | 1.8 | 5.3 | -0.9 | 4.6 | 1.7 | 2.0 | 2.0 | 2.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 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 | -79.1 | 70 | 77 | -26.9 | -32.5 | -92.2 | -2.3 | -16.7 | -48.2 | -48.6 | -123.1 | -89.8 | -69.2 | -13.2 | -22.1 | -48.7 | -81.5 | -76.0 | -32.9 | -130.9 | -15.2 | -310.7 | -256.5 | -62.9 | -110.4 | -79.6 | -226.8 | -53.9 | -53.0 | -42.3 | -46.0 | -80.9 | -91.1 | -39.8 | -184.0 | -39.0 | -50.0 | -24.8 | -31.5 | -46.0 | -40.2 | -88.5 | -66.9 | -90.5 | -21.5 | -21.3 |
| 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 Revenues | -1.1 | 1.2 | 1.3 | -0.5 | -0.7 | -2.0 | -0.0 | -0.3 | -0.9 | -1.0 | -2.3 | -1.7 | -1.3 | -0.3 | -0.4 | -0.9 | -1.5 | -1.5 | -0.6 | -2.4 | -0.3 | -6.1 | -4.8 | -1.2 | -2.1 | -1.6 | -4.5 | -1.1 | -1.1 | -1.0 | -1.0 | -1.8 | -2.1 | -1.0 | -4.4 | -1.0 | -1.3 | -0.7 | -0.9 | -1.3 | -1.2 | -2.7 | -2.1 | -2.8 | -0.7 | -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 | 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 | -615.3 | -816.5 | 97 | -149.9 | -901.8 | 347 | -104.4 | -229.7 | -115.3 | -210.9 | 143 | -155.1 | -27.9 | -197.7 | -45.1 | -168.8 | 24 | -118.1 | -1.7 | -112.2 | -7.9 | 86 | 234 | -171.5 | 58 | -121.3 | 202 | -189.1 | 57 | -173.3 | 31 | -110.0 | 70 | -218.7 | 150 | -116.7 | 16 | -85.6 | -14.5 | -154.5 | 66 | -75.8 | 23 | 8.4 | -100.8 | -61.0 |
| 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 Revenues | -8.8 | -13.8 | 1.7 | -2.8 | -19.9 | 7.4 | -1.9 | -4.2 | -2.2 | -4.2 | 2.6 | -2.9 | -0.5 | -3.8 | -0.8 | -3.1 | 0.5 | -2.3 | -0.0 | -2.0 | -0.1 | 1.7 | 4.4 | -3.2 | 1.1 | -2.5 | 4.0 | -3.9 | 1.2 | -4.0 | 0.7 | -2.5 | 1.6 | -5.3 | 3.6 | -3.0 | 0.4 | -2.3 | -0.4 | -4.4 | 2.0 | -2.3 | 0.7 | 0.3 | -3.2 | -2.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | -290.4 | -219.6 | 219 | 93 | -153.7 | 368 | -3.0 | -6.4 | 2.3 | 0.2 | -3.9 | -0.5 | -5.1 | -12.2 | 14 | 1.0 | -2.0 | -7.8 |
| Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | -4.2 | -3.7 | 3.8 | 1.7 | -3.4 | 7.9 | -0.1 | -0.1 | 0.0 | 0.0 | -0.1 | -0.0 | -0.1 | -0.2 | 0.3 | 0.0 | -0.0 | -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 | -16.6 | 76 | -9.8 | 83 | 38 | -64.1 | 19 | 3.3 | -5.1 | -35.2 | 29 | -0.8 | -26.8 | -0.5 | 26 | -11.2 | -21.1 | 6.7 | -1.9 | 15 | -22.2 | 2.5 | 20 | 16 | -26.4 | 26 | 10 | 1.6 | -4.0 | -0.6 | 20 | 7.7 | 22 | -13.9 | 18 | 16 | -15.9 | 16 | 33 | -28.4 | -14.2 | 47 | -20.3 | 6.2 | 10 | 15 |
| Percentage of IncreaseDecreaseInAccountsPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -506.0 | -343.9 | 123 | 45 | -1244.6 | 371 | 23 | -237.8 | -222.7 | 141 | 274 | -203.8 | 71 | 177 | 54 | -292.7 | 12 | 185 | 61 | -258.1 | -208.8 | 146 | 278 | -26.2 | 273 | 23 | 174 | -95.8 | 64 | -115.5 | 311 | -118.2 | 95 | 111 | 141 | 64 | 93 | 175 | 207 | -178.3 | 48 | -147.6 | 127 | 148 | 65 | 107 |
| Percentage of IncreaseDecreaseInInventories | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 404 | 526 | 43 | 270 | 780 | 113 | 103 | 240 | 165 | 259 | -24.1 | 244 | 92 | 198 | 83 | 218 | 53 | 185 | 37 | 250 | 30 | 198 | 31 | 233 | 42 | 199 | 32 | 242 | -4.7 | 215 | 15 | 189 | 43 | 235 | 4.9 | 192 | 19 | 100 | 65 | 186 | -28.4 | 153 | 54 | 65 | 63 | 69 |
| 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 Revenues | 5.8 | 8.9 | 0.7 | 5.0 | 17.2 | 2.4 | 1.9 | 4.4 | 3.1 | 5.2 | -0.4 | 4.6 | 1.7 | 3.8 | 1.5 | 4.0 | 1.0 | 3.6 | 0.7 | 4.5 | 0.6 | 3.9 | 0.6 | 4.4 | 0.8 | 4.0 | 0.6 | 4.9 | -0.1 | 4.9 | 0.3 | 4.2 | 1.0 | 5.7 | 0.1 | 4.9 | 0.5 | 2.7 | 1.8 | 5.3 | -0.9 | 4.6 | 1.7 | 2.0 | 2.0 | 2.4 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 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 | 384 | 239 | 151 | 182 | 279 | -232.3 | 157 | 99 | 100 | 92 | 92 | 112 | 97 | 93 | 151 | 97 | 87 | 98 | 115 | 107 | 112 | 95 | 97 | 118 | 115 | 111 | 116 | 106 | 100 | 95 | 109 | 92 | 89 | 83 | 83 | 81 | 78 | 73 | 69 | 70 | 71 | 69 | 67 | 56 | 47 | 55 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 4.1 | 2.6 | 3.4 | 6.2 | -5.0 | 2.8 | 1.8 | 1.9 | 1.8 | 1.7 | 2.1 | 1.8 | 1.8 | 2.7 | 1.8 | 1.7 | 1.9 | 2.1 | 1.9 | 2.1 | 1.9 | 1.8 | 2.2 | 2.2 | 2.3 | 2.3 | 2.2 | 2.1 | 2.2 | 2.4 | 2.1 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 1.9 | 2.0 | 2.2 | 2.1 | 2.1 | 1.7 | 1.5 | 1.9 |
| 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 384 | 239 | 182 | 279 | -232.3 | 99 | 100 | 92 | 92 | 112 | 97 | 93 | 151 | 97 | 87 | 98 | 115 | 107 | 112 | 95 | 97 | 118 | 115 | 111 | 116 | 106 | 100 | 95 | 109 | 92 | 89 | 83 | 83 | 81 | 78 | 73 | 69 | 70 | 71 | 69 |
| Percentage of NetIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Percentage of Revenues | 5.5 | 4.1 | 3.4 | 6.2 | -5.0 | 1.8 | 1.9 | 1.8 | 1.7 | 2.1 | 1.8 | 1.8 | 2.7 | 1.8 | 1.7 | 1.9 | 2.1 | 1.9 | 2.1 | 1.9 | 1.8 | 2.2 | 2.2 | 2.3 | 2.3 | 2.2 | 2.1 | 2.2 | 2.4 | 2.1 | 2.0 | 2.0 | 2.0 | 2.1 | 2.0 | 2.0 | 1.9 | 2.0 | 2.2 | 2.1 |
| Percentage of Revenues us-gaap:RetainedEarnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 6.5 | 20 | 7.3 | 7.2 | 11 | 4.5 | 3.0 | 9.5 | 4.9 | 13 | 3.5 | 3.6 | 4.1 | 14 | 2.5 | 2.6 | 10 | 4.6 | 2.6 | 3.1 | 4.1 | 15 | 2.8 | 3.8 | 6.3 | 11 | 4.8 | 4.2 | 10.0 | 7.3 | 4.0 | 4.5 | 6.1 | 6.7 | 3.4 | 4.0 | 5.4 | 5.8 | 2.7 | 4.2 | 5.6 | 5.9 | 2.3 | 3.0 | 4.6 | 6.0 |
| Percentage of ShareBasedCompensation | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -79.1 | 70 | 77 | -26.9 | -32.5 | -92.2 | -2.3 | -16.7 | -48.2 | -48.6 | -123.1 | -89.8 | -69.2 | -13.2 | -22.1 | -48.7 | -81.5 | -76.0 | -32.9 | -130.9 | -15.2 | -310.7 | -256.5 | -62.9 | -110.4 | -79.6 | -226.8 | -53.9 | -53.0 | -42.3 | -46.0 | -80.9 | -91.1 | -39.8 | -184.0 | -39.0 | -50.0 | -24.8 | -31.5 | -46.0 | -40.2 | -88.5 | -66.9 | -90.5 | -21.5 | -21.3 |
| 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 Revenues | -1.1 | 1.2 | 1.3 | -0.5 | -0.7 | -2.0 | -0.0 | -0.3 | -0.9 | -1.0 | -2.3 | -1.7 | -1.3 | -0.3 | -0.4 | -0.9 | -1.5 | -1.5 | -0.6 | -2.4 | -0.3 | -6.1 | -4.8 | -1.2 | -2.1 | -1.6 | -4.5 | -1.1 | -1.1 | -1.0 | -1.0 | -1.8 | -2.1 | -1.0 | -4.4 | -1.0 | -1.3 | -0.7 | -0.9 | -1.3 | -1.2 | -2.7 | -2.1 | -2.8 | -0.7 | -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 | 2012-06-30 | 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 | 74 | 41 | 42 | 37 | 33 | 42 | 83 | 63 | 62 | 60 | 103 | 80 | 101 | 101 | 82 | 59 | 78 | 90 | 56 | 69 | 63 | 54 | 68 | 44 | 68 | 66 | 57 | 50 | 52 | 49 | 50 | 40 | 33 | 37 | 33 | 36 | 35 | 50 | 38 | 24 | 72 | 37 | 26 | 14 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | -615.3 | -816.5 | 97 | -149.9 | -901.8 | 347 | -104.4 | -229.7 | -115.3 | -210.9 | 143 | -155.1 | -27.9 | -197.7 | -45.1 | -168.8 | 24 | -118.1 | -1.7 | -112.2 | -7.9 | 86 | 234 | -171.5 | 58 | -121.3 | 202 | -189.1 | 57 | -173.3 | 31 | -110.0 | 70 | -218.7 | 150 | -116.7 | 16 | -85.6 | -14.5 | -154.5 | 66 | -75.8 | 23 | 8.4 | -100.8 | -61.0 |
| 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 Revenues | -8.8 | -13.8 | 1.7 | -2.8 | -19.9 | 7.4 | -1.9 | -4.2 | -2.2 | -4.2 | 2.6 | -2.9 | -0.5 | -3.8 | -0.8 | -3.1 | 0.5 | -2.3 | -0.0 | -2.0 | -0.1 | 1.7 | 4.4 | -3.2 | 1.1 | -2.5 | 4.0 | -3.9 | 1.2 | -4.0 | 0.7 | -2.5 | 1.6 | -5.3 | 3.6 | -3.0 | 0.4 | -2.3 | -0.4 | -4.4 | 2.0 | -2.3 | 0.7 | 0.3 | -3.2 | -2.2 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 710 | 310 | 287 | 0.0 | 1.1 | 78 | 0.0 | 0.0 | 11 | 33 | 0.0 | 0.0 | 76 | 23 | 9.7 | 390 | 35 | 0.4 | 28 | 48 | 51 | 371 | 26 | 150 | 51 | 9.6 | 109 | 196 | 66 | 116 | 48 | 0.1 | 4.3 | 14 | 37 | 6.4 | 131 | 400 | 244 | 164 | 111 | 58 | 17 | 88 | 382 | 37 |
| Percentage of PaymentsForRepurchaseOfCommonStock | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 |
| Value | 4.5 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 LongTermDebtAndCapitalLeaseObligations | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 LongTermDebtAndCapitalLeaseObligations an:SeniorNotesatFourPointFivePercentDue2025 us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
| Value | 3.8 | 0.04 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 | 0.038 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 84.4 | 88.9 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 | 84.4 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 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 LongTermDebtAndCapitalLeaseObligations an:SeniorNotesatThreePointEightPercentDue2027 us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 |
| Value | 3.5 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| Percentage of DebtInstrumentInterestRateStatedPercentage | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 | 77.8 |
| Percentage of LongTermDebtAndCapitalLeaseObligations | 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 LongTermDebtAndCapitalLeaseObligations an:SeniorNotesatThreePointFivePercentDue2024 us-gaap:SeniorNotes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 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 | 1.2 | 2.6 | 3.1 | 3.7 | 5.2 | 4.6 | 5.0 | 6.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 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 |
| Value | 52.78 | 52.29 | 50.2 | 48.49 | 46.99 | 45.07 | 36.43 | 28.48 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | 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 | 228 | 151 | 150 | 146 | 221 | 204 | 183 | 162 | 142 | 134 |
| Percentage of DeferredTaxAssetsNet | 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 | 7000000.0 | 5300000.0 | 4300000.0 | 6400000.0 | 5800000.0 | 5600000.0 | 4900000.0 | 4800000.0 | 6800000.0 | 6400000.0 | 6900000.0 | 2500000.0 | 9600000.0 |
| 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 |
| 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 |
| Value | 4800000.0 | 4500000.0 | 8900000.0 | 5400000.0 | 2500000.0 | 2400000.0 | 2500000.0 | 2700000.0 | 6500000.0 | 6500000.0 | 7400000.0 |
| Percentage of DeferredTaxAssetsValuationAllowance | 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 |
| Value | 4800000.0 | 4500000.0 | 4300000.0 | 3600000.0 |
| Percentage of DeferredTaxAssetsValuationAllowance | 100.0 | 100.0 | 48.3 | 66.7 |
| 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 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | -74800000.0 | -75400000.0 | -118700000.0 | -74500000.0 | -445000000.0 | -85700000.0 | -76500000.0 | -61300000.0 | -58500000.0 | -71300000.0 | -63300000.0 | -44300000.0 | -42700000.0 | -47200000.0 | -28400000.0 | -7900000.0 | -43300000.0 | -45900000.0 | -48000000.0 | -67000000.0 | -44500000.0 | -51500000.0 | -46700000.0 | -45500000.0 | -43500000.0 | -49300000.0 | -36600000.0 | -35300000.0 | -36600000.0 | -47400000.0 | -41900000.0 | -38300000.0 | -31500000.0 | -35700000.0 | -32400000.0 | -33600000.0 | -26800000.0 | -35200000.0 |
| Percentage of CorporateAndOtherIncomeAndAdjustments | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 47 | 47 | 49 | 51 | 49 | 48 | 46 | 45 | 44 | 44 | 42 | 42 | 41 | 40 | 40 | 41 | 39 | 37 | 36 | 36 | 35 | 34 | 33 | 32 | 32 | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 22 | 22 | 20 | 21 | 21 | 20 |
| Percentage of DepreciationAndAmortizationExcludingDebtFinancingCostsAndDiscounts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 6.6 | 9.4 | 10 | 11 | 16 | 25 | 29 | 33 | 37 | 39 | 37 | 32 | 32 | 28 | 26 | 25 | 24 | 21 | 20 | 18 | 19 | 18 | 16 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 13 | 12 | 12 | 11 | 10 | 10 | 10 | 9.7 | 10 | 11 | 12 | 10 | 9.7 | 9.6 |
| Percentage of FloorplanInterestExpense | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -110.8 | -206.1 | 376 | -178.3 | -461.5 | 30 | 45 | -62.7 | -104.8 | -12.5 | 113 | -58.4 | 35 | -124.2 | 114 | -63.6 | 37 | 41 | 75 | -66.1 | 12 | 132 | 99 | -102.7 | 43 | -54.1 | 114 | -45.2 | 34 | -41.9 | 101 | -41.1 | 97 | -68.3 | 32 | 2.0 | 35 | 67 | 68 | -43.3 | 58 | -43.1 | 55 | 54 | 31 | -23.3 |
| Percentage of IncreaseDecreaseInVehicleFloorPlanPayableNonTradeNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -624.1 | -256.5 | 82 | -40.3 | -698.1 | 76 | 47 | -185.8 | -168.1 | 65 | 284 | -180.1 | 74 | 63 | 148 | -188.1 | -16.2 | -8.4 | 221 | -237.4 | -194.5 | 13 | 319 | -36.5 | 248 | -43.6 | 184 | -59.1 | -9.2 | -143.2 | 316 | -104.5 | 76 | 75 | 206 | 76 | 70 | 49 | 319 | -118.4 | -37.1 | -181.2 | 178 | 81 | 26 | 65 |
| Percentage of IncreaseDecreaseInVehicleFloorplanPayableTradeNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 800000.0 | 100000.0 | 400000.0 | 400000.0 | 500000.0 | 900000.0 | 1200000.0 | 700000.0 |
| Percentage of OtherFinancingPropertyEquipment | 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 | 0 | 90.0 | 0 | 88.11 | 0 | 0.89 | 0 | 0 | 0 | 0.92 | -0.01 |
| Percentage of PercentageOfNewVehicleSalesCoreBrands | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 0 | 64.0 | 1.0 |
| Percentage of PercentageofRevenueCertainStates | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 598 | 402 | -339.7 | 379 | 259 | 200 | -16.7 | 246 | 242 | 213 | -32.8 | 229 | 230 | 220 | 247 | 228 | 219 | 213 | 224 | 244 | 253 | 236 | 251 | 265 | 259 | 248 | 258 | 237 | 233 | 212 | 223 | 211 | 214 | 198 | 194 | 183 | 189 | 138 | 132 | 134 | 133 | 128 | 122 | 110 | 116 |
| Percentage of SegmentIncomeLoss | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 169 | 118 | 107 | 111 | 82 | 54 | 65 | 70 | 65 | 56 | 54 | 67 | 67 | 60 | 66 | 69 | 60 | 61 | 64 | 83 | 85 | 77 | 78 | 94 | 84 | 79 | 74 | 76 | 70 | 63 | 57 | 64 | 66 |
| Percentage of SegmentIncomeLoss | 28.2 | 29.4 | -31.5 | 29.5 | 31.6 | 27.0 | -390.4 | 28.6 | 27.2 | 26.4 | -166.8 | 29.3 | 29.2 | 27.3 | 26.9 | 30.2 | 27.4 | 28.7 | 28.6 | 34.4 | 33.8 | 32.7 | 31.1 | 35.6 | 32.7 | 31.9 | 28.6 | 32.3 | 30.2 | 30.0 | 25.8 | 30.4 | 30.8 |
| 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 |
| Value | 203 | 125 | 108 | 123 | 88 | 65 | 77 | 86 | 81 | 72 | 68 | 85 | 78 | 72 | 75 | 81 | 75 | 71 | 66 | 79 | 74 | 76 | 70 | 85 | 80 | 75 | 71 | 77 | 77 | 65 | 63 | 72 | 72 |
| Percentage of SegmentIncomeLoss | 34.0 | 31.2 | -32.0 | 32.6 | 34.0 | 32.9 | -465.3 | 35.3 | 33.6 | 34.1 | -208.8 | 37.2 | 33.9 | 33.0 | 30.4 | 35.4 | 34.3 | 33.6 | 29.8 | 32.5 | 29.5 | 32.2 | 28.2 | 32.2 | 30.9 | 30.2 | 27.6 | 32.4 | 33.1 | 30.8 | 28.4 | 34.4 | 34.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 225 | 158 | 164 | 143 | 89 | 80 | 112 | 89 | 95 | 84 | 91 | 76 | 84 | 87 | 105 | 78 | 83 | 80 | 93 | 80 | 92 | 83 | 102 | 85 | 94 | 94 | 113 | 84 | 85 | 83 | 102 | 74 | 75 |
| Percentage of SegmentIncomeLoss | 37.7 | 39.3 | -48.5 | 37.9 | 34.4 | 40.1 | -673.7 | 36.1 | 39.3 | 39.6 | -278.7 | 33.5 | 36.9 | 39.7 | 42.7 | 34.4 | 38.3 | 37.7 | 41.6 | 33.1 | 36.7 | 35.1 | 40.7 | 32.2 | 36.4 | 37.9 | 43.7 | 35.3 | 36.7 | 39.2 | 45.9 | 35.1 | 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 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 0 | 1.7 | 0 | 1.977 | -0.005 | 0.028 | -0.001 | -0.001 | -0.001 | 0.04 | 0.001 | 0.001 | 0.002 | 0.031 | -0.001 | 0.003 | 0.001 | 0.023 | 0 | 0 | 0 | 0.02 | 0.001 | 0 | 0 | 0.017 | 0 | 0 | 0 | 0.018 | -0.001 | 0 | 0 | 0.02 | 0 | -0.001 | 0 | 0.022 |
| Percentage of VehicleFloorplanFacilityInterestRateDuringPeriod | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 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 | 0.1 | 1.7 | -0.1 | 2.374 | -0.005 | 0.031 | -0.002 | 0 | -0.001 | 0.039 | 0.001 | 0.002 | 0.001 | 0.031 | -0.002 | 0.004 | 0.001 | 0.022 | 0.001 | 0 | 0.001 | 0.019 | 0 | 0 | 0 | 0.017 | 0 | 0 | 0 | 0.017 | 0 | 0 | 0 | 0.018 | -0.001 | 0 | -0.001 | 0.022 |
| Percentage of VehicleFloorplanFacilityInterestRateDuringPeriod | 0.0 | 100.0 | 0.0 | 120.1 | 100.0 | 110.7 | 200.0 | -0.0 | 100.0 | 97.5 | 100.0 | 200.0 | 50.0 | 100.0 | 200.0 | 133.3 | 100.0 | 95.7 | 0.0 | 0.0 | 0.0 | 95.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 94.4 | -0.0 | 0.0 | 0.0 | 90.0 | 0.0 | -0.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 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 | 1100000.0 | 1100000.0 | 1200000.0 | 1200000.0 | 1100000.0 | 1200000.0 | 1300000.0 | 1300000.0 | 1300000.0 | 1300000.0 | 1200000.0 | 1200000.0 | 1300000.0 | 1700000.0 | 1400000.0 | 1400000.0 | 1400000.0 | 1400000.0 | 1400000.0 | 1300000.0 | 1400000.0 | 1300000.0 | 1300000.0 | 1200000.0 | 1100000.0 | 1100000.0 | 1400000.0 | 1400000.0 | 1500000.0 | 1400000.0 | 1400000.0 | 1500000.0 | 1400000.0 | 1400000.0 | 1400000.0 | 1400000.0 | 1500000.0 | 1300000.0 | 1100000.0 | 1100000.0 | 1000000.0 | 1100000.0 | 1100000.0 | 1000000.0 | 800000.0 | 600000.0 |
| Percentage of AmortizationOfFinancingCostsAndDiscounts | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | -0.6 | 12 | 1.5 | -0.6 | -8.5 | 17 | 4.3 | -1.1 | 4.5 | 21 | 4.4 | 8.6 | 1.9 | 26 | 25 | -3.2 | 3.5 | 22 | 14 | -0.2 | -1.7 | 16 | 8.8 | 1.3 | 2.4 | 12 | 0.6 | 1.9 | 0.6 | 13 | 17 | 3.7 | -1.7 | 9.0 |
| Percentage of CapitalExpendituresIncurredButNotYetPaid | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | -0.1 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 0.0 | 0.0 | 0.0 | -0.1 | -0.2 | -0.5 | -0.3 | -0.3 | -0.2 | -0.2 | -0.3 | -0.3 | -0.2 | -0.2 | -0.4 | -0.2 | -0.3 | -0.2 | -0.3 | 1.8 | 3.9 | -0.3 | -0.2 | -0.6 | 0.1 | 0.2 | 0.0 | 0.2 | 0.1 | 4.0 | 0.2 | 2.0 | -0.9 |
| Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Period End | 2021-06-30 | 2021-03-31 | 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 | 7.0 | 17 | 1.7 | 0.0 | 9.9 | 14 | 2.5 | 0.5 | 2.6 | 24 |
| Percentage of ContractWithCustomerAssetReclassifiedToReceivable | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 |
| Value | 8.2 | 8.7 | 6.3 | 5.9 | 10 | 8.5 | 6.2 | 7.4 | 8.5 | 13 | 8.1 | 6.8 | 7.4 |
| Percentage of ContractWithCustomerLiabilityRevenueRecognized | 100.0 | 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 | 5.7 | 5.4 | 5.2 | 9.9 | 3.9 | 0.0 | 0.5 | 2.0 | 2.3 | 4.6 | 7.6 | 4.1 | 6.0 |
| Percentage of ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod | 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 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 |
| Value | -0.9 | -19.6 | -13.9 | -7.9 | 51 | -68.6 | 9.0 | 34 | 1.2 | 0.8 | 2.1 | 10 | 0.7 | 1.0 | -26.7 | -0.4 | 3.9 | 4.2 | 1.1 | -8.3 | 6.1 | 4.8 | -13.1 | 15 | 5.4 | 2.7 | -2.4 | 5.3 | 5.1 | 1.5 | -5.5 | 7.6 | 3.5 | 4.3 | 11 | 7.2 | 5.0 | 3.2 | 15 | 11 | 1.7 | 3.0 |
| Percentage of DeferredIncomeTaxesAndTaxCredits | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -2.0 |
| Percentage of EquitySecuritiesFvNiUnrealizedGainLoss | 100.0 |
| Period End | 2021-06-30 |
| Value | 3.4 |
| Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount | 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 | 1.7 | 0.7 | 5.5 | 0.9 | 1.5 | 0.0 | 25 | 6.4 | 4.4 | 8.3 | 19 | 18 | 8.2 | 12 | 51 | 14 | 20 | 9.6 | 32 | 11 | 12 | 6.1 | 7.0 | 9.7 | 5.6 | 1.5 | 1.4 | 4.0 | 0.1 | 8.3 | 7.7 | 0.0 | 2.2 | -0.1 |
| Percentage of GainLossOnDispositionOfAssets1 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2014-09-30 | 2014-06-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 318 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 GoodwillImpairmentLoss | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 | 2019-06-30 | 2019-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2014-09-30 | 2014-06-30 |
| Value | 0.0 | 0.0 | 0.0 | 318 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of GoodwillImpairmentLoss | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 41 |
| Percentage of GoodwillImpairmentLoss | 0.0 | 0.0 | 13.1 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0.0 | 0.0 | 19 |
| Percentage of GoodwillImpairmentLoss | 0.0 | 0.0 | 6.1 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | -2.980232238769531e-14 | 0.0 | 257 |
| Percentage of GoodwillImpairmentLoss | 0.0 | 0.0 | 80.9 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 5200000.0 | -2300000.0 | 0 |
| Percentage of GoodwillOtherIncreaseDecrease | 100.0 | 100.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 0 | -100000.0 |
| Percentage of GoodwillOtherIncreaseDecrease | 0.0 | -0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -100000.0 | 0 |
| Percentage of GoodwillOtherIncreaseDecrease | 0.0 | 4.3 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 5200000.0 | -1900000.0 | -100000.0 |
| Percentage of GoodwillOtherIncreaseDecrease | 100.0 | 82.6 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 0 | 200000.0 |
| Percentage of GoodwillOtherIncreaseDecrease | 0.0 | -0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | -300000.0 | 0 |
| Percentage of GoodwillOtherIncreaseDecrease | 0.0 | 13.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 |
| Value | 0.0 | 0.0 | 0.0 | 59 | 0.0 | 0.3 | 9.6 | 0.0 | 0.0 |
| Percentage of ImpairmentOfIntangibleAssetsExcludingGoodwill | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 0 | 0 | 0 | 2400000.0 |
| Percentage of ImpairmentOfIntangibleAssetsFinitelived | 0.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 | 2016-09-30 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 |
| Value | 0.0 | 0.0 | 0.0 | 57 | 0.0 | 0.0 | 9.6 | 0.0 | 0.0 | 0.0 | 8.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 4.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 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 | 700000.0 | 900000.0 | 1100000.0 | 100000.0 | 5700000.0 | 100000.0 | 0 | 0 | 600000.0 | 0 | 1000000.0 |
| Percentage of ImpairmentOfLongLivedAssetsHeldForUse | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 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 | -100000.0 | -100000.0 | 0 | 0 | -100000.0 | -100000.0 | 0 | -500000.0 | -200000.0 | -100000.0 | -200000.0 | -300000.0 | 200000.0 | 400000.0 | -200000.0 | -100000.0 | 0 | -100000.0 | -300000.0 | -500000.0 | -100000.0 | -300000.0 | -300000.0 | -500000.0 | -100000.0 | -200000.0 | -200000.0 | -200000.0 | -300000.0 | -400000.0 | -300000.0 | -200000.0 | -200000.0 | -200000.0 | 300000.0 | -300000.0 | -400000.0 | -500000.0 | -500000.0 | 0 | -1400000.0 | -900000.0 | -800000.0 | -1600000.0 | -2800000.0 | -3600000.0 |
| Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | -110.0 | 38 | 162 | 11 | 158 | -403.4 | 87 | 48 | 1.0 | -193.3 | 175 | -52.3 | -42.5 | -214.6 | 205 | 89 | -31.6 | -201.6 | 236 | -26.1 | 49 | -161.2 | 151 | -12.9 | -8.0 | -38.5 | 165 | -34.6 | 23 | -74.0 | 141 | -19.9 | 32 | -108.1 | 183 | -23.6 | 20 | -68.8 | 184 | -2.4 | -19.1 | -36.0 | 67 | -1.3 | -7.8 | -2.7 |
| Percentage of IncreaseDecreaseInAccountsAndOtherReceivables | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -26.8 | 8.2 | -4.0 | -6.5 | -78.6 | 3.5 | -15.4 | -12.0 | 11 | -33.2 | 6.6 | 2.1 | 25 | 74 | 15 | -6.4 | 11 | 16 | -4.6 | -3.7 | 18 | 23 | -1.1 | -6.3 | 17 | -1.4 | 15 | 6.3 | 7.1 | 11 | 7.6 | 2.7 | 7.7 | 3.5 | 10 | 1.8 | 9.2 | 14 | 13 | -1.8 | 3.0 | 9.3 | -1.4 | -10.3 | -13.1 | -3.8 |
| 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 | -27.500000000000014 | 129 | -14.9 | 47 | 98 | -68.3 | -31.8 | 38 | -31.0 | 2.2 | -9.0 | 18 | -45.5 | 33 | 42 | 80 | -43.2 | 58 | -4.8 | 51 | -43.8 | 40 | -6.3 | 40 | -48.2 | 54 | 46 | 36 | -30.0 | 65 | 16 | 23 | -41.6 | 64 | 6.5 | 26 | -29.3 | 51 | 5.6 | 41 | -47.5 | 15 | -5.5 | 24 | -11.8 | 0.1 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 800000.0 | 800000.0 | 200000.0 | 600000.0 | 200000.0 | 0 | 100000.0 | 500000.0 | 300000.0 | 200000.0 | -100000.0 | 400000.0 | 500000.0 | 600000.0 | 0 | 400000.0 | 300000.0 | 500000.0 | 0 | 700000.0 | 700000.0 | 700000.0 | -100000.0 | 1200000.0 | 1300000.0 | 1500000.0 | -100000.0 | 1500000.0 | 1700000.0 | 1800000.0 | 0 | 2000000.0 | 1900000.0 | 2000000.0 | 0 | 2200000.0 | 2000000.0 | 2000000.0 | -100000.0 | 2600000.0 | 2600000.0 | 2700000.0 | 300000.0 | 2100000.0 | 1300000.0 |
| Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 | 2010-03-31 |
| Value | 0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 200000.0 | 300000.0 | 300000.0 | 300000.0 | 200000.0 | 200000.0 | 200000.0 | 200000.0 | 400000.0 | 300000.0 | 300000.0 | 400000.0 | 100000.0 | 0 | 0 | 0 | 100000.0 | 0 | 100000.0 | 100000.0 | 0 | 0 | 100000.0 | 0 | 100000.0 | 100000.0 | 0 | 100000.0 | 100000.0 | 100000.0 | 0 | 300000.0 | 300000.0 | 600000.0 | 300000.0 | 300000.0 | 200000.0 |
| Percentage of InvestmentIncomeInterest | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 | 2017-12-31 | 2017-09-30 |
| Value | 0.0 | 0.0 | 350 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of MaturitiesOfSeniorDebt | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 300 |
| Percentage of MaturitiesOfSeniorDebt | 0.0 | 0.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-02-29 | 2020-03-31 |
| Value | 0.0 | 0.0 | 350 | 350 |
| Percentage of MaturitiesOfSeniorDebt | 0.0 | 0.0 | 100.0 | 0.0 |
| Period End | 2021-01-31 |
| Value | 300 |
| Percentage of MaturitiesOfSeniorDebt | 0.0 |
| Period End | 2021-01-31 |
| Value | 300 |
| Percentage of MaturitiesOfSeniorDebt | 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 | -615.3 | -816.5 | 97 | -149.9 | -901.8 | 347 | -104.4 | -229.7 | -115.3 | -210.9 | 143 | -155.1 | -27.9 | -197.7 | -45.1 | -168.8 | 24 | -118.1 | -1.7 | -112.2 | -7.9 | 86 | 234 | -171.5 | 58 | -121.3 | 202 | -189.1 | 57 | -173.3 | 31 | -110.0 | 71 | -213.2 | 150 | -116.7 | 16 | -85.6 | -14.5 | -154.5 | 66 | -75.8 | 27 | 9.1 | -100.2 | -62.2 |
| Percentage of NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | -79.1 | 70 | 77 | -26.9 | -32.5 | -92.2 | -2.3 | -16.7 | -48.2 | -48.6 | -123.1 | -89.8 | -69.2 | -13.2 | -22.1 | -48.7 | -81.5 | -76.0 | -32.9 | -130.9 | -15.2 | -310.7 | -256.5 | -62.9 | -110.4 | -79.6 | -226.8 | -53.9 | -53.0 | -42.3 | -46.0 | -80.9 | -91.1 | -39.8 | -184.0 | -39.0 | -50.0 | -24.8 | -31.5 | -46.0 | -40.1 | -88.6 | -67.0 | -90.5 | -21.5 | -21.0 |
| Percentage of NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 404 | 526 | 43 | 270 | 780 | 113 | 103 | 240 | 165 | 259 | -24.1 | 244 | 91 | 198 | 83 | 218 | 53 | 185 | 37 | 250 | 30 | 198 | 32 | 233 | 43 | 199 | 32 | 242 | -4.5 | 215 | 16 | 189 | 41 | 231 | 5.2 | 192 | 20 | 100 | 65 | 186 | -28.6 | 153 | 50 | 64 | 61 | 70 |
| Percentage of NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 100000.0 | 1100000.0 | 1700000.0 | 0 | 400000.0 | 0 | 0 | 0 | 200000.0 | 0 | 0 | 0 | 0 |
| Percentage of OperatingLeaseImpairmentLoss | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 5.6 | 3.1 | 7.0 | 7.8 | -0.2 | -3.6 | 2.7 | 2.4 | -0.3 | 2.0 | -3.3 | 0.8 | 1.6 | 0.1 | 2.1 | 1.4 | -3.5 | 7.3 | 8.2 | 1.9 | 4.3 | -3.8 | 1.8 | -4.9 | 1.0 | 0.8 | -0.6 | -2.8 | 4.2 | 1.2 | 3.5 | -0.9 | 1.3 | 2.9 | 1.4 | 2.4 | -1.7 | 1.9 | -0.5 | -2.3 | 0.3 | 2.2 | -1.1 | -0.4 |
| 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 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 0.7 | -0.1 | 4.6 | -6.6 | 3.4 | -7.9 | 31 | 5.1 | 3.7 | 8.7 | 23 | 17 | 13 | 10 | 24 | 14 | 20 | 19 | 48 | 10 | 5.8 | 5.0 | 5.8 | 7.0 | 3.8 | 1.3 | 2.9 | 4.0 | 3.7 | 8.0 | 7.3 | -0.2 |
| Percentage of OtherOperatingIncomeExpenseNet | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2010-03-31 |
| Value | 3.3 | -0.6 | -0.1 | -0.3 | 0.8 | -0.1 | -0.1 | -1.9 | 2.0 | 0.1 | -0.3 | 0.1 | 0.8 | 0.1 | 0.9 | 0.2 | 0.9 | -0.1 | -0.1 | -0.2 | 0.5 | -0.9 | 1.7 | 2.4 | 1.4 | 1.8 | 3.4 | 2.7 | 3.3 | 2.0 | 1.2 | 1.3 | 1.1 | -0.1 | 1.3 | 1.6 | 0.1 | -1.8 | -5.3 | 3.1 | 2.0 | -2.1 | 0.0 |
| Percentage of PaymentsForProceedsFromOtherInvestingActivities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 3300000.0 |
| Percentage of PaymentsForRestructuring | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 200000.0 |
| Percentage of PaymentsForRestructuring | 0.0 | 6.1 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 700000.0 |
| Percentage of PaymentsForRestructuring | 0.0 | 21.2 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0 | 2400000.0 |
| Percentage of PaymentsForRestructuring | 0.0 | 72.7 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 | 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 |
| Value | 0.0 | 0.5 | 4.4 | 6.1 | 0.0 | 0.0 | 0.0 | 0.9 | 6.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.0 | 13 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of PaymentsOfDebtIssuanceCosts | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 |
| Value | 0.0 | 17 | -0.09999999999999906 | 0.09999999999999906 | 0.2 | 7.9 | 0.0 | 0.0 | 0.3 | 2.7 | 0.0 | 0.0 | 0.4 | 2.3 | 0.0 | 0.1 | 0.6 | 0.4 |
| Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 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 | 0.0 | 0.0 | 0.0 | 0.4 | 0.0 | 0.4 | 0.0 | 4.3 | -0.7 | 65 | 0.8 | 1.9 | 19 | 4.0 | 47 | 5.8 | 47 | 99 | 6.3 | 256 | 197 | 50 | 45 | 27 | 191 | 13 | 0.0 | 0.0 | 15 | 0.4 | 69 | 2.8 | 141 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 64 | 0.0 | 60 | 0.0 | 12 |
| Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 100.0 |
| Period End | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-06-30 | 2019-03-31 |
| Value | 0.0 | 0.0 | 50 | 0.0 | 0.0 |
| Percentage of PaymentsToAcquireOtherInvestments | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 2.4 | 1.9 | 6.8 | 2.2 | 0.0 | 0.0 | 48 | 44 | 4.9 | 17 | 29 | 47 | 7.6 | 89 | 56 | 13 | 24 | 9.9 | 62 | 37 | 43 | 6.1 | 7.7 | 20 | 0.0 | 15 | 19 | 11 | -0.2 | 10.0 | 0.0 | 0.0 | 10 | 0.0 | 6.8 | 0.0 | 0.0 | 0.0 | 0.0 | 3.7 | 0.0 | 1.2 | 0.6 | 7.6 | 1.9 | 2.9 |
| Percentage of ProceedsFromDivestitureOfBusinessesNetOfCashDivested | 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 | 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 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2011-03-31 | 2010-12-31 | 2010-03-31 |
| Value | 0 | 400000.0 | 300000.0 | 1200000.0 | 200000.0 | 0 | 3000000.0 | 300000.0 | 0 | 0 | 1100000.0 | 0 | 500000.0 | 0 | 0 | 1200000.0 | 3100000.0 | 0 | 0 | 0 | 1000000.0 | -1000000.0 | 300000.0 | 0 | 100000.0 | 0 | 0 | 1800000.0 |
| Percentage of ProceedsFromInsuranceSettlementInvestingActivities | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2020-09-30 | 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 |
| Value | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 350 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 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 | 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 | 0.0 | 10.0 | 310 | 790 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 400 | 467 | 180 | 260 | 280 | 290 | 320 | 440 | 100 | 230 | 540 | 540 | 1820 | 350 | 320 | 290 | 195 | 245 | 270 | 105 | 460 | 105 | 310 | 405 | 640 | 50 | 185 | 65 | -20.0 | 130 | 195 | 0.0 |
| Percentage of ProceedsFromLongTermLinesOfCredit | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 |
| Value | 0.0 | 0.0 | -140.0 | -30.0 | -130.0 | -170.0 | 0.0 | -160.0 | 30 | -90.0 | 420 | -60.0 | -665.0 | 205 | 25 | -177.0 | -33.0 | 16 | 32 | 326 | 164 | 136 | 298 | 0.0 | 0.0 | 0.0 |
| Percentage of ProceedsFromRepaymentsOfCommercialPaper | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 |
| Value | 0.0 | 109 |
| Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities | 0.0 | 100.0 |
| Period End | 2021-03-31 |
| Value | 109 |
| Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities | 100.0 |
| Period End | 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 | 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 |
| Value | 8.2 | 8.2 | 31 | 2.3 | 4.2 | 0.0 | 10 | 8.0 | 0.4 | 1.8 | 3.3 | 0.0 | 21 | 13 | 4.8 | 0.0 | 0.0 | 0.0 | 1.4 | 1.4 | 8.7 | 0.0 | 0.0 | 0.2 | 2.2 | 0.2 | 20 | 0.0 | 0.0 | 1.8 | 3.5 | 1.1 | 0.0 | 10 | 1.9 | 9.0 | 0.0 | 0.0 | 6.6 |
| Percentage of ProceedsFromSaleOfPropertyHeldForSale | 100.0 | 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 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 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 | 7.7 | 21 | 21 | 30 | 0.0 | 1.0 | 4.7 | 4.9 | 2.9 | 0.3 | 1.8 | 1.8 | 0.9 | 13 | 15 | 1.9 | 1.3 | 21 | 0.6 | 4.6 | 2.6 | 0.6 | 5.9 | 5.4 | 6.4 | 12 | 5.5 | 7.5 | 6.8 | 15 | 2.2 | 9.9 | 2.7 | 7.9 | 9.9 | 19 | 1.4 | 0.3 | 11 | 26 | 8.0 | 31 | 19 | 24 | 5.3 | 0.2 |
| Percentage of ProceedsFromStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 2010-03-31 |
| Value | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 | 482 | 385 | 180 | 260 | 280 | 290 | 320 | 440 | 100 | 1030 | 775 | 615 | 1120 | 305 | 240 | 305 | 215 | 325 | 290 | 225 | 315 | 240 | 180 | 500 | 445 | 25 | 75 | 80 | 10.0 | 0.0 |
| Percentage of RepaymentsOfLongTermLinesOfCredit | 0.0 | 100.0 | 0.0 | 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 1.8 | 3.8 | 1.5 | 2.0 | 1.1 | 1.8 | 1.8 | 2.6 | 8.5 | 4.2 | 1.2 |
| Percentage of RepaymentsOfOtherDebt | 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 | 2.9 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 100.0 |
| Period End | 2020-09-30 |
| Value | 2.8 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 96.6 |
| Period End | 2020-09-30 |
| Value | 7.3 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 251.7 |
| Period End | 2020-09-30 |
| Value | 2.1 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 72.4 |
| Period End | 2020-09-30 |
| Value | 0.8 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 27.6 |
| Period End | 2020-09-30 |
| Value | 20 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 710.3 |
| Period End | 2020-09-30 |
| Value | 36 |
| Percentage of RestructuringAndRelatedCostIncurredCost | 1258.6 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 9.6 | 7.7 | 23 | 7.4 | 10 | 15 | 12 | 8.1 | 14 | 11 |
| Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 10 | 2.8 | -9.6 | -1.4 | 16 | 11 | 15 | 3.9 | 2.5 | 9.6 |
| Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability | 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 |
| Value | 51.1 | 50.57 | 3.54 | 48.86 | 0 | 18.12 | 0.17 | 35.61 | 31.76 | 25.93 | -3.95 | 16.67 | 22.5 | 51.15 | 4.08 | 35.27 | 28.55 | 34.03 | 0.28 | 35.55 | 26.93 | 22.94 | 0.78 | 26.94 | 24.96 | 20.15 | 0.91 | 17.54 | 19.44 | 20.84 | -0.15 | 20.32 | 24.54 | 19.49 | 0.87 | 18.56 | 17.15 | 18.8 | 0.2 | 18.35 |
| Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 |
| Value | 200000.0 | 2260.0 | 200000.0 | 0 | 899.0 | 6601.0 | 77831.0 | 607.0 | 0 | 9730.0 | 45690.0 | 453.0 | 141.0 | 17796.0 | 8124.0 | 1233.0 | 4788.0 | 24125.0 |
| Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-03-31 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 600000.0 | 7340.0 | 500000.0 | 0 | 2045.0 | 71171.0 | 233130.0 | 0 | 0 | 9837.0 | 112820.0 |
| Percentage of StockIssuedDuringPeriodSharesShareBasedCompensationGross | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2011-03-31 | 2010-12-31 | 2010-09-30 | 2010-06-30 |
| Value | 200000.0 | 400000.0 | 400000.0 | 600000.0 | 0 | 55000.0 | 200000.0 | 100000.0 | 90248.0 | 11227.0 | 100000.0 | 100000.0 | 42092.0 | 300000.0 | 300000.0 | 100000.0 | 46817.0 | 632040.0 | 0 | 100000.0 | 100000.0 | 26261.0 | 200000.0 | 200000.0 | 300000.0 | 600000.0 | 200000.0 | 400000.0 | 300000.0 | 700000.0 | 100000.0 | 500000.0 | 100000.0 | 400000.0 | 500000.0 | 1100000.0 | 100000.0 | 16489.0 | 600000.0 | 1400000.0 | 400000.0 | 1900000.0 | 1200000.0 | 1600000.0 | 300000.0 |
| Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 7.7 | 4.1 | 30 | -0.2 | -6.9 | 4.8 | 2.6 | -2.4 | 1.8 | 1.8 | 0.4 | 11 | 15 | 1.9 | 1.3 | 21 | 0.5 | 4.6 | 2.7 | 1.2 | 10 | 7.3 | 10.0 | 20 | 8.1 | 12 | 11 | 21 | 3.7 | 14 | 4.1 | 10 | 12 | 25 | 3.3 | 0.4 | 15 | 30 | 11 | 43 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | -1.2 | -32.9 | 4.6 | -0.4 | -21.7 | -1.0 | -4.0 | -9.8 | -2.4 | -2.8 | -1.3 | -2.2 | 1.5 | -0.2 | -0.1 | -6.0 | 0.0 | -0.5 | -1.7 | -5.3 | 2.4 | 1.0 | 0.7 | -6.0 | 1.4 | -2.4 | 0.4 | -6.7 | 0.0 | -0.6 | 0.8 | -5.3 | -1.4 | -6.4 | 0.9 | -4.7 | -1.1 | -4.9 | 2.1 | 3.1 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | -15.6 | -802.4 | 15.1 | 200.0 | 314.5 | -20.8 | -153.8 | 408.3 | -133.3 | -155.6 | -325.0 | -19.8 | 10.0 | -10.5 | -7.7 | -27.9 | 0.0 | -10.9 | -63.0 | -441.7 | 23.8 | 13.7 | 7.0 | -29.3 | 17.3 | -19.7 | 3.4 | -31.9 | 0.0 | -4.3 | 19.5 | -48.6 | -11.2 | -25.6 | 27.3 | -1175.0 | -7.1 | -16.2 | 17.9 | 7.2 |
| 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 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 |
| Value | 8.9 | 37 | 25 | 0.2 | 14 | 5.8 | 6.6 | 7.4 | 4.2 | 4.6 | 1.7 | 13 | 13 | 2.1 | 1.4 | 27 | 0.5 | 5.1 | 4.4 | 6.5 | 7.7 | 6.3 | 9.3 | 26 | 6.7 | 14 | 11 | 27 | 3.7 | 14 | 3.3 | 16 | 13 | 31 | 2.4 | 5.1 | 16 | 35 | 9.6 | 40 |
| Percentage of StockIssuedDuringPeriodValueShareBasedCompensation | 115.6 | 902.4 | 84.9 | -100.0 | -214.5 | 120.8 | 253.8 | -308.3 | 233.3 | 255.6 | 425.0 | 119.8 | 90.0 | 110.5 | 107.7 | 127.9 | 100.0 | 110.9 | 163.0 | 541.7 | 76.2 | 86.3 | 93.0 | 129.3 | 82.7 | 119.7 | 96.6 | 131.9 | 100.0 | 104.3 | 80.5 | 148.6 | 111.2 | 125.6 | 72.7 | 1275.0 | 107.1 | 116.2 | 82.1 | 92.8 |
| 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 | 2011-12-31 | 2010-12-31 |
| Value | 0.7 | 1.0 | 3.3 | 2.8 | 0.1 | 8.5 | 0.0 | 0.9 | 1.1 | 0.2 | 1.0 | 0.6 | 0.3 | 1.3 | 26 | 0.2 | -0.2 | 0.0 | 0.0 | 6.2 | 6.9 | 0.9 | 1.6 | 2.0 | 2.3 | 0.2 | 0.8 | 0.0 | 0.0 | 0.3 | 0.7 | 0.0 | 0.0 | 0.0 | 0.5 | 2.2 | 0.0 |
| Percentage of TangibleAssetImpairmentCharges | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 |
| Value | 98.17 | 79.76 | 20.81 | 0 | 0 | 31.95 | 0 | 0 | 39.54 | 34.34 | 0 | 0 | 47.3 | 48.38 | 0 | 43.28 | 39.92 | 0 | -0.18 | 48.62 | 48.51 | 47.2 | -0.05 | 59.83 | 62.78 |
| Percentage of TreasuryStockAcquiredAverageCostPerShare | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 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 |
| Value | 40 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 100.0 |
| Period End | 2021-06-30 |
| Value | 0.2 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 0.5 |
| Period End | 2021-06-30 |
| Value | 797 |
| Percentage of TreasuryStockRetiredCostMethodAmount | 1963.5 |
| Period End | 2021-06-30 |
| Value | -838.0 |
| Percentage of TreasuryStockRetiredCostMethodAmount | -2064.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 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 | 7.5 | 3.8 | 4.7 | 0.0 | 0.0 | 2.5 | 0.0 | 0.0 | 0.3 | 1.0 | 0.0 | 0.0 | 1.6 | 0.5 | 0.0 | 9.2 | 0.9 | 0.0 | 0.6 | 1.0 | 1.0 | 7.9 | 0.4 | 2.5 | 0.8 |
| Percentage of TreasuryStockSharesAcquired | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-04-30 | 2017-11-30 | 2015-10-31 | 2010-10-31 |
| Value | 16 | 18 | 43 | 30 |
| Percentage of TreasuryStockSharesRetired | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-03-31 | 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 | 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 |
| Value | 736 | 306 | 80 | 11 | 33 | 0.0 | 0.0 | 73 | 26 | 0.0 | 400 | 35 | 0.4 | 26 | 50 | 51 | 371 | 26 | 150 | 51 | 9.6 | 69 | 236 | 66 | 116 | 48 | 0.2 | 4.2 | 2.5 | 49 | 0.3 | 127 | 405 | 217 | 196 | 111 | 58 |
| Percentage of TreasuryStockValueAcquiredCostMethod | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 736 | 306 | 302 | 0.0 | 0.0 | 80 | 0.0 | 0.0 | 11 | 33 | 0.0 | 0.0 | 73 | 26 | 0.0 | 400 | 34 | 0.0 | 26 | 50 | 50 | 370 | 26 | 150 | 50 |
| Percentage of TreasuryStockValueAcquiredCostMethod | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 98.3 | 0.0 | 99.6 | 99.6 | 97.7 | 99.9 | 100.0 | 100.0 | 96.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-03-31 | 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 | 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 |
| Value | 736 | 306 | 80 | 11 | 33 | 0.0 | 0.0 | 73 | 26 | 0.0 | 400 | 35 | 0.4 | 26 | 50 | 51 | 371 | 26 | 150 | 51 | 9.6 | 69 | 236 | 66 | 116 | 48 | 0.2 | 4.2 | 2.5 | 49 | 0.3 | 127 | 405 | 217 | 196 | 111 | 58 |
| Percentage of TreasuryStockValueAcquiredCostMethod | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | -144.6 | -2.0 |
| Percentage of UnrealizedGainLossOnInvestments | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2015-08-04 | 2015-05-22 |
| Value | 1000 | 1000 | 1000 | 1000 | 1000 | 300 |
| Percentage of CommercialPaperMaximumAggregateAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 397 | 495 | 445 | 338 | 367 | 189 | 506 | 415 | 413 | 423 | 568 | 431 | 455 | 485 | 655 | 461 | 390 | 438 | 595 | 364 | 398 | 395 | 508 | 376 | 405 | 441 | 460 | 330 | 370 | 387 | 424 | 317 | 329 | 323 | 404 | 260 | 262 | 272 | 306 | 171 | 171 | 210 |
| Percentage of ContractsInTransitAndVehicleReceivables | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 0.00125 |
| Percentage of CreditSpreadImpactLeverageRatioCreditAgreement | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 80 | 85 |
| Percentage of DeferredTaxAssetsLeaseLiabilities | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 6800000.0 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwardsAndCapitalLossCarryforwards | 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 |
| Value | 1000000.0 | 200000.0 | 1400000.0 | 1900000.0 | 3300000.0 | 2900000.0 | 3000000.0 | 3000000.0 | 4000000.0 | 4500000.0 | 5400000.0 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccountsAndProvisionForLoanLosses | 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 |
| Value | 53 | 50 | 48 | 47 | 71 | 63 | 57 | 49 | 42 | 38 | 38 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantySelfInsuranceAndChargebacks | 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 |
| Value | 219 | 269 | 225 | 207 | 293 | 263 | 233 | 200 | 170 | 142 | 107 |
| Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndIntangibleAssets | 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 | 75 | 80 |
| Percentage of DeferredTaxLiabilitiesRightOfUseAsset | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 |
| Value | 111 | 112 | 116 | 105 | 106 | 101 | 93 | 130 | 131 | 131 |
| Percentage of FinanceLeasesIncludedInLongtermDebt | 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 | 412 | 415 |
| Percentage of LeaseRightofUseAssets | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 459 | 459 |
| Percentage of Leaseliabilities | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 161 | 186 | 210 | 181 | 152 | 172 | 234 | 203 | 198 | 198 | 242 | 201 | 206 | 217 | 253 | 222 | 195 | 203 | 234 | 213 | 204 | 189 | 221 | 200 | 180 | 180 | 198 | 151 | 153 | 138 | 172 | 136 | 138 | 137 | 159 | 124 | 134 | 125 | 138 | 107 | 115 | 127 |
| Percentage of ManufacturerReceivables | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 15 |
| Percentage of MultiemployerPlansPotentialWithdrawalObligationCeaseParticipation | 100.0 |
| Period End | 2020-12-31 |
| Value | 3.0 |
| Percentage of MultiemployerPlansPotentialWithdrawalObligationCeaseParticipation | 20.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 |
| Value | 777 | 887 | 848 | 686 | 676 | 513 | 917 |
| Percentage of ReceivablesBeforeAllowanceforCreditLossCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 |
| Value | 5000000.0 | 5000000.0 | 1400000.0 | 1400000.0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 0 | 0 | 0 | 0 |
| Percentage of RightofUseAssetFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 100 | 100 | 102 | 101 |
| Percentage of SuretyBondsLettersOfCreditAndCashDepositsTotal | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 160 | 147 | 138 | 128 | 122 | 117 | 136 | 131 | 122 | 132 | 130 | 126 | 130 | 145 | 162 | 147 | 142 | 144 | 147 | 139 | 137 | 137 | 133 | 127 | 125 | 125 | 125 | 117 | 109 | 110 | 110 | 105 | 104 | 101 | 97 | 96 | 91 | 93 | 94 | 91 | 87 | 89 |
| Percentage of TradeReceivables | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 3400000.0 | 2800000.0 | 2400000.0 | 2800000.0 | 4200000.0 | 4000000.0 | 3600000.0 | 3600000.0 | 5500000.0 | 5200000.0 | 4800000.0 | 2000000.0 |
| Percentage of UnrecognizedTaxBenefitsDeferredTaxAssets | 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 | 0.2 | 0.5 | 0.3 | 251 |
| Percentage of UsedVehicleFloorplanFacilityCurrentBorrowingCapacity | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 24 | 58 | 44 | 288 |
| Percentage of UsedVehicleFloorplanFacilityRemainingBorrowingCapacity | 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 |
| Value | 4700 | 4700 | 4700 | 4800 | 4800 | 4700 | 4700 | 4800 | 4800 | 4900 | 4800 | 4800 | 4700 | 4800 | 4700 | 4700 | 4700 | 4600 | 4700 | 4600 | 4600 | 4600 | 4300 | 4100 | 3900 | 3800 | 3600 | 3500 | 3400 | 3300 | 3300 | 3000 | 3000 | 3000 | 2900 |
| Percentage of VehicleFloorplanFacilityMaximumBorrowingCapacity | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 562 | 482 | 482 | 482 | 482 | 482 | 515 | 515 | 515 | 515 | 515 | 500 | 500 | 500 | 500 | 510 | 490 | 450 | 430 | 395 | 395 | 360 | 350 | 335 | 335 | 315 | 315 | 275 | 275 | 275 | 275 | 275 | 275 | 275 | 275 |
| Percentage of VehicleFloorplanFacilityMaximumBorrowingCapacity | 12.0 | 10.3 | 10.3 | 10.0 | 10.0 | 10.3 | 11.0 | 10.7 | 10.7 | 10.5 | 10.7 | 10.4 | 10.6 | 10.4 | 10.6 | 10.9 | 10.4 | 9.8 | 9.1 | 8.6 | 8.6 | 7.8 | 8.1 | 8.2 | 8.6 | 8.3 | 8.8 | 7.9 | 8.1 | 8.3 | 8.3 | 9.2 | 9.2 | 9.2 | 9.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 1571 | 2298 | 2759 | 2308 | 2522 | 3682 | 3575 | 3481 | 3731 | 4031 | 3997 | 3603 | 3839 | 3739 | 3806 | 3630 | 3894 | 3868 | 3849 | 3539 | 3802 | 4039 | 3727 | 3203 | 3321 | 3002 | 3097 | 2774 | 2869 | 2844 | 3029 | 2600 | 2748 | 2541 | 2540 | 2200 | 2122 | 2016 | 1898 | 1511 | 1673 | 1866 |
| Percentage of VehicleFloorplanPayable | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 1000 | 1900 | 2300 | 2100 | 2200 | 3300 | 3200 | 3100 | 3300 | 3700 | 3600 | 3200 | 3500 | 3400 | 3400 | 3200 | 3500 | 3500 | 3500 | 3200 | 3400 | 3700 | 3500 | 3100 | 3100 | 2800 | 2900 | 2600 | 2700 | 2700 | 2900 | 2400 | 2600 | 2500 | 2400 |
| Percentage of VehicleFloorplanPayable | 63.6 | 82.7 | 83.3 | 91.0 | 87.2 | 89.6 | 89.5 | 89.1 | 88.4 | 91.8 | 90.1 | 88.8 | 91.1 | 90.9 | 89.3 | 88.1 | 89.9 | 90.5 | 90.9 | 90.4 | 89.4 | 91.6 | 93.9 | 96.8 | 93.3 | 93.3 | 93.6 | 93.7 | 94.1 | 94.9 | 95.7 | 92.3 | 94.6 | 98.4 | 94.5 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 |
| Value | 537 | 423 | 437 | 193 | 337 | 383 | 424 | 416 | 408 | 377 | 413 | 367 | 374 | 333 | 439 | 394 | 397 | 372 | 377 | 373 | 364 | 318 | 212 | 148 | 232 | 182 | 236 | 189 | 199 | 161 | 177 | 174 | 182 | 80 | 119 |
| Percentage of VehicleFloorplanPayable | 34.2 | 18.4 | 15.9 | 8.4 | 13.4 | 10.4 | 11.9 | 12.0 | 10.9 | 9.4 | 10.3 | 10.2 | 9.7 | 8.9 | 11.6 | 10.9 | 10.2 | 9.6 | 9.8 | 10.5 | 9.6 | 7.9 | 5.7 | 4.6 | 7.0 | 6.1 | 7.6 | 6.8 | 6.9 | 5.7 | 5.9 | 6.7 | 6.6 | 3.2 | 4.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 901 | 1012 | 1218 | 841 | 1023 | 1485 | 1455 | 1407 | 1473 | 1577 | 1609 | 1495 | 1538 | 1506 | 1627 | 1561 | 1629 | 1581 | 1540 | 1442 | 1462 | 1467 | 1161 | 950 | 1031 | 961 | 1006 | 862 | 891 | 857 | 898 | 763 | 804 | 699 | 773 | 641 | 639 | 604 | 536 | 468 | 511 | 486 |
| Percentage of VehicleFloorplanPayable | 57.4 | 44.1 | 44.1 | 36.4 | 40.6 | 40.3 | 40.7 | 40.4 | 39.5 | 39.1 | 40.3 | 41.5 | 40.1 | 40.3 | 42.8 | 43.0 | 41.8 | 40.9 | 40.0 | 40.8 | 38.4 | 36.3 | 31.2 | 29.7 | 31.1 | 32.0 | 32.5 | 31.1 | 31.1 | 30.1 | 29.7 | 29.3 | 29.3 | 27.5 | 30.5 | 29.1 | 30.1 | 30.0 | 28.3 | 31.0 | 30.6 | 26.1 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 669 | 1285 | 1541 | 1467 | 1499 | 2197 | 2120 | 2073 | 2257 | 2453 | 2388 | 2107 | 2301 | 2233 | 2179 | 2069 | 2264 | 2286 | 2308 | 2096 | 2340 | 2572 | 2565 | 2253 | 2289 | 2041 | 2090 | 1912 | 1977 | 1986 | 2130 | 1837 | 1944 | 1841 | 1766 | 1559 | 1482 | 1412 | 1362 | 1043 | 1161 | 1379 |
| Percentage of VehicleFloorplanPayable | 42.6 | 55.9 | 55.9 | 63.6 | 59.4 | 59.7 | 59.3 | 59.6 | 60.5 | 60.9 | 59.7 | 58.5 | 59.9 | 59.7 | 57.2 | 57.0 | 58.2 | 59.1 | 60.0 | 59.2 | 61.6 | 63.7 | 68.8 | 70.3 | 68.9 | 68.0 | 67.5 | 68.9 | 68.9 | 69.9 | 70.3 | 70.7 | 70.7 | 72.5 | 69.5 | 70.9 | 69.9 | 70.0 | 71.7 | 69.0 | 69.4 | 73.9 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 848 | 917 |
| Percentage of AccountsReceivableGrossCurrent | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 47 | 110 | 13 | 25 |
| Percentage of AccruedIncomeTaxes | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 3800000.0 | 3700000.0 | 3700000.0 | 3700000.0 | 3500000.0 | 700000.0 | 500000.0 | 400000.0 | 4000000.0 | 4300000.0 | 4600000.0 | 4000000.0 | 4200000.0 | 4500000.0 | 5500000.0 | 5100000.0 | 4600000.0 | 5000000.0 | 5800000.0 | 5300000.0 | 4600000.0 | 4100000.0 | 4500000.0 | 4300000.0 | 3800000.0 | 4000000.0 | 3700000.0 | 3600000.0 | 3300000.0 | 3200000.0 | 4000000.0 | 3600000.0 | 3400000.0 | 3200000.0 | 3400000.0 | 3100000.0 | 2800000.0 | 2800000.0 | 3000000.0 | 2700000.0 | 3400000.0 | 3700000.0 |
| Percentage of AllowanceForDoubtfulAccountsReceivableCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 81 | 56 | 25 | 21 | 37 | 36 | 40 | 114 | 174 | 98 | 67 | 83 | 83 | 61 | 169 | 41 |
| Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 9000000.0 | 9100000.0 | 9400000.0 |
| Percentage of CapitalizedContractCostNetNoncurrent | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 |
| Value | 200 | 0.0 | 140 | 170 | 300 | 470 | 470 | 630 | 600 | 690 | 270 | 330 | 995 | 790 | 765 | 942 | 975 | 958 | 926 | 599 | 435 | 298 | 0.0 |
| Percentage of CommercialPaper | 100.0 | 0.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2018-01-01 |
| Value | 29 | 18 | 25 | 26 | 21 | 21 | 26 | 25 | 26 | 26 | 28 | 24 | 23 | 19 | 18 |
| Percentage of ContractWithCustomerAssetNetCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2018-01-01 |
| Value | 6.8 | 5.3 | 10 | 6.8 | 2.3 | 7.2 | 7.0 | 10 | 8.6 | 9.0 | 17 | 13 | 9.7 | 5.9 | 1.4 |
| Percentage of ContractWithCustomerAssetNetNoncurrent | 100.0 | 100.0 | 100.0 | 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 | 2018-01-01 |
| Value | 58 | 56 | 56 | 55 | 55 | 57 | 57 | 58 | 57 | 57 | 61 | 64 | 64 | 63 | 63 |
| Percentage of ContractWithCustomerLiabilityNoncurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-05-21 | 2019-12-31 |
| Value | 500 | 500 | 500 | 500 | 500 | 500 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-11-07 | 2016-12-31 |
| Value | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 300 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 60.0 | 60.0 | 60.0 | 60.0 | 60.0 | 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 | 2017-11-07 | 2016-12-31 |
| Value | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 450 | 0.0 |
| Percentage of DebtInstrumentCarryingAmount | 90.0 | 90.0 | 90.0 | 90.0 | 90.0 | 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 | 2015-12-31 |
| Value | 13 | 14 | 14 | 15 | 16 | 9.2 | 9.8 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 15 | 8.8 | 9.5 | -10.2 | 10 | 13 |
| 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 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 99 | 85 | 78 | 78 | 68 |
| Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent | 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 | 324 | 287 | 240 | 218 | 313 | 283 | 252 | 221 | 186 | 151 |
| 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 | 2014-12-31 | 2013-12-31 | 2012-12-31 | 2011-12-31 | 2010-12-31 |
| Value | 233 | 156 | 159 | 151 | 224 | 207 | 186 | 165 | 148 | 140 | 156 |
| Percentage of DeferredTaxAssetsGross | 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 |
| Value | 20 | 25 | 23 | 22 | 36 | 35 | 28 | 24 | 20 | 11 | 10 |
| Percentage of DeferredTaxAssetsInventory | 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 |
| Value | 6.8 | 6.8 | 7.0 | 6.5 | 5.4 | 13 | 7.2 | 10 | 13 | 14 | 15 |
| Percentage of DeferredTaxAssetsOperatingLossCarryforwards | 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 |
| Value | 4.6 | 9.5 | 8.8 | 10 | 17 | 6.8 | 13 | 12 | 15 | 18 | 16 |
| 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 |
| 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 | 24 | 20 | 19 | 18 | 31 | 28 | 24 | 19 | 12 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther | 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 |
| Value | 10 | 14 | 21 | 18 | 25 | 24 | 26 | 24 | 20 | 18 | 21 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 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 |
| Value | 31 | 27 | 30 | 25 | 33 | 32 | 25 | 21 | 31 | 35 | 47 |
| Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 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 | 19 | 6.3 |
| Percentage of DeferredTaxLiabilitiesInvestments | 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 |
| Value | 10.0 | 17 | 14 | 11 | 20 | 19 | 19 | 21 | 16 | 9.4 | 4.8 |
| Percentage of DeferredTaxLiabilitiesOther | 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 | 1.1 | 1.1 | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 15 | 15 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 34 | 34 |
| Percentage of DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 269 | 231 | 225 | 214 | 178 |
| Percentage of EmployeeRelatedLiabilitiesCurrent | 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 | 19 | 20 | 23 | 17 | 22 | 24 | 20 | 20 | 19 | 17 |
| Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 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 | 56 | 50 | 50 | 50 |
| Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2019-12-31 | 2018-12-31 |
| Value | 53 | 75 | 0.0 |
| Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount | 94.2 | 0.0 | 0.0 |
| Period End | 2020-12-31 |
| Value | 134 |
| Percentage of FinanceLeaseLiability | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 27 | 26 |
| Percentage of FinanceLeaseLiabilityCurrent | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 107 | 87 |
| Percentage of FinanceLeaseLiabilityNoncurrent | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 190 |
| Percentage of FinanceLeaseLiabilityPaymentsDue | 100.0 |
| Period End | 2020-12-31 |
| Value | 110 |
| Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 33 |
| Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths | 100.0 |
| Period End | 2020-12-31 |
| Value | 11 |
| Percentage of FinanceLeaseLiabilityPaymentsDueYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 11 |
| Percentage of FinanceLeaseLiabilityPaymentsDueYearFour | 100.0 |
| Period End | 2020-12-31 |
| Value | 11 |
| Percentage of FinanceLeaseLiabilityPaymentsDueYearThree | 100.0 |
| Period End | 2020-12-31 |
| Value | 11 |
| Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo | 100.0 |
| Period End | 2020-12-31 |
| Value | 55 |
| Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 102 | 82 |
| Percentage of FinanceLeaseRightOfUseAsset | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 6.46 | 9.09 |
| Percentage of FinanceLeaseWeightedAverageDiscountRatePercent | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 7400000.0 | 7400000.0 | 7100000.0 | 8400000.0 | 8200000.0 | 7900000.0 | 8300000.0 | 8400000.0 | 7700000.0 | 7300000.0 | 6900000.0 | 9900000.0 | 9500000.0 | 9000000.0 | 8700000.0 | 8300000.0 | 8000000.0 | 7700000.0 | 7500000.0 | 7300000.0 | 7200000.0 | 7000000.0 | 6800000.0 | 6600000.0 | 6400000.0 | 6200000.0 | 6000000.0 | 5800000.0 | 5600000.0 | 5500000.0 | 5300000.0 | 5100000.0 | 4900000.0 | 4600000.0 | 4300000.0 | 4100000.0 | 3800000.0 | 3500000.0 | 3200000.0 | 3000000.0 | 3100000.0 | 2700000.0 |
| 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 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 19 | 19 | 19 | 21 | 21 | 21 | 23 | 23 | 23 | 23 | 22 | 25 | 24 | 24 | 23 | 20 | 19 | 18 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 9.9 | 9.9 | 8.9 | 8.4 | 8.4 | 8.4 | 8.4 | 8.3 | 5.6 |
| 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 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2019-06-30 | 2019-03-31 |
| Value | 457 | 457 | 457 | 457 | 0.0 | 0.0 |
| Percentage of GoodwillFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 |
| Value | 257 | 257 | 257 | 257 |
| Percentage of GoodwillImpairedAccumulatedImpairmentLoss | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 |
| Value | 10.0 | 11 | 11 | 12 |
| Percentage of GuaranteeObligationsMaximumExposure | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 509 | 509 | 509 | 509 | 509 | 509 | 566 | 566 | 566 | 580 | 580 | 580 | 564 | 572 | 572 | 603 | 603 | 589 | 589 | 572 | 536 | 546 | 432 | 399 | 385 | 362 | 348 | 332 | 328 | 329 | 329 | 320 | 322 | 284 | 285 | 208 | 208 | 212 | 212 | 212 | 212 | 199 |
| Percentage of IndefiniteLivedFranchiseRights | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 |
| Value | 136 | 151 | 160 | 168 | 198 | 67 | 25 |
| Percentage of IndefiniteLivedFranchiseRights | 26.8 | 26.7 | 27.7 | 29.4 | 33.6 | 15.7 | 7.4 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 105 | 106 | 108 | 108 | 110 | 120 | 122 |
| Percentage of IndefiniteLivedFranchiseRights | 20.8 | 18.9 | 18.8 | 19.0 | 18.7 | 28.0 | 35.3 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 266 | 308 | 310 | 295 | 281 | 243 | 199 |
| Percentage of IndefiniteLivedFranchiseRights | 52.4 | 54.4 | 53.6 | 51.6 | 47.7 | 56.3 | 57.3 |
| Period End | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 |
| Value | 26 | 26 | 26 | 26 | 8.9 | 8.9 | 8.9 | 0.0 | 31 | 31 |
| Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 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 |
| Value | 528 | 528 | 528 | 530 | 530 | 530 | 589 | 590 | 590 | 604 | 602 | 605 | 588 | 596 | 595 | 624 | 623 | 608 | 605 | 588 | 551 | 561 | 446 | 413 | 398 | 375 | 360 | 344 | 340 | 340 | 340 |
| Percentage of IntangibleAssetsGrossExcludingGoodwill | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 54 |
| Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths | 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 |
| Value | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 41 | 41 | 41 | 41 | 47 |
| 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 | 100.0 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2016-03-31 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2015-03-31 | 2014-12-31 | 2014-09-30 | 2014-06-30 | 2014-03-31 | 2013-12-31 | 2013-09-30 | 2013-06-30 | 2013-03-31 | 2012-12-31 | 2012-09-30 | 2012-06-30 | 2012-03-31 | 2011-12-31 | 2011-09-30 | 2011-06-30 | 2010-12-31 |
| Value | 7.0 | 7.1 | 309 | 307 | 307 | 305 | 355 | 394 | 393 | 393 | 44 | 5.3 | 12 | 414 | 414 | 566 | 562 | 165 | 167 | 13 | 12 | 11 | 13 | 22 | 24 | 25 | 25 | 17 | 17 | 11 | 30 | 29 | 29 | 13 | 29 | 28 | 28 | 31 | 12 | 93 | 11 | 8.1 |
| Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 1811 | 1812 | 2116 | 2105 | 2106 | 2391 | 1943 | 1980 | 1981 | 1981 | 1983 | 1980 | 1983 | 2388 | 2389 | 1871 | 1787 | 1791 | 1789 | 1782 | 1750 | 1754 | 1767 | 1770 | 1830 | 2055 | 2128 | 1933 | 1839 |
| Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 1797 | 1798 | 2101 | 2089 | 2090 | 1592 | 1934 | 1969 | 1970 | 1969 | 1970 | 1967 | 1970 | 2373 | 2373 | 1780 | 1778 |
| Percentage of LongTermDebtFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 2016-12-31 |
| Value | 2017 | 1999 | 2341 | 2306 | 2216 | 1527 | 2001 | 2027 | 2001 | 1955 | 1908 | 1944 | 1949 | 2385 | 2442 | 1857 | 1862 |
| Percentage of LongTermDebtFairValue | 112.3 | 111.2 | 111.4 | 110.4 | 106.1 | 95.9 | 103.5 | 102.9 | 101.6 | 99.3 | 96.9 | 98.8 | 99.0 | 100.5 | 102.9 | 104.3 | 104.7 |
| Period End | 2020-12-31 |
| Value | 884 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 307 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths | 100.0 |
| Period End | 2020-12-31 |
| Value | 456 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive | 100.0 |
| Period End | 2020-12-31 |
| Value | 456 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour | 100.0 |
| Period End | 2020-12-31 |
| Value | 5800000.0 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree | 100.0 |
| Period End | 2020-12-31 |
| Value | 5700000.0 |
| Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 |
| Value | 5.17 | 5.27 |
| Percentage of OperatingLeaseWeightedAverageDiscountRatePercent | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 104 |
| Percentage of OperatingLossCarryforwards | 100.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 | 2014-12-31 |
| Value | 82 | 80 | 77 | 78 | 75 | 74 | 71 |
| Percentage of OtherLiabilities | 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 | 2011-12-31 |
| Value | 57 | 57 | 55 | 38 | 33 | 35 | 38 | 39 | 35 | 32 | 31 | 32 | 42 | 39 | 44 | 74 | 45 | 49 | 48 | 65 | 57 | 50 | 38 | 36 | 40 | 35 | 37 | 46 | 35 | 30 | 36 | 34 | 39 | 31 | 39 | 36 | 41 |
| Percentage of OtherReceivablesGrossCurrent | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 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 | 10 | 6.0 | 1.8 | 1.8 | 1.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Percentage of PropertyPlantAndEquipmentFairValueDisclosure | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2017-03-31 | 2016-12-31 | 2016-09-30 | 2016-06-30 | 2015-12-31 | 2015-09-30 | 2015-06-30 | 2014-12-31 | 2014-09-30 |
| Value | 1.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5.9 | 5.9 | 4.2 | 24 | 10 | 15 | 0.0 | 0.0 |
| Percentage of PropertyPlantAndEquipmentFairValueDisclosure | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 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 |
| Value | 200000.0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 100000.0 | 500000.0 | 500000.0 | 800000.0 | 900000.0 | 800000.0 | 700000.0 | 700000.0 | 1400000.0 | 1900000.0 |
| Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 5.1 | 3.0 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 100.0 | 100.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 3.2 | 7.3 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 62.7 | 243.3 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 1.1 | 1.2 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 21.6 | 40.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 2.6 | 4.5 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 51.0 | 150.0 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 17 | 20 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 345.1 | 686.7 |
| Period End | 2020-12-31 | 2020-09-30 |
| Value | 36 | 43 |
| Percentage of RestructuringAndRelatedCostExpectedCost1 | 719.6 | 1456.7 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 100000.0 | 100000.0 | 3400000.0 |
| Percentage of RestructuringReserve | 100.0 | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 200000.0 |
| Percentage of RestructuringReserve | 5.9 |
| Period End | 2021-06-30 | 2021-03-31 | 2020-12-31 |
| Value | 100000.0 | 100000.0 | 800000.0 |
| Percentage of RestructuringReserve | 100.0 | 100.0 | 23.5 |
| Period End | 2020-12-31 |
| Value | 2400000.0 |
| Percentage of RestructuringReserve | 70.6 |
| 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 |
| Value | 91 | 88 | 88 | 87 | 87 | 89 | 89 | 89 | 88 | 88 | 92 | 95 | 29 | 28 |
| Percentage of RevenueRemainingPerformanceObligation | 100.0 | 100.0 | 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 |
| Value | 1900000.0 | 1661200.0 | 1028500.0 | 519610.0 | 0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2019-12-31 | 2018-12-31 | 2017-12-31 | 2016-12-31 |
| Value | 41.36 | 40.56 | 46.69 | 43.22 | 0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue | 100.0 | 100.0 | 100.0 | 100.0 | 0.0 |
| Period End | 2020-12-31 | 2016-12-31 |
| Value | 3100000.0 | 3300000.0 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant | 100.0 | 100.0 |
| Period End | 2020-12-31 |
| Value | 19 |
| Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue | 100.0 |
| Period End | 2021-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | 2018-09-30 | 2018-06-30 | 2018-03-31 | 2017-12-31 | 2017-09-30 | 2017-06-30 | 2016-12-31 |
| Value | 0.25 | 0.033 | 0.0213 | 0.0241 | 0.0287 | 0.0297 | 0.0322 | 0.0277 | 0.0264 | 0.0226 | 0.0197 | 0.018 | 0.0172 | 0.0126 |
| Percentage of ShortTermDebtWeightedAverageInterestRate | 100.0 | 100.0 | 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 | 155 | 891 | 197 |
| Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 | 100.0 | 100.0 | 100.0 |
| Period End | 2020-10-19 |
| Value | 500 |
| Percentage of StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 | 0.0 |
| Period End | 2020-12-31 |
| Value | 1900000.0 |
| Percentage of TaxCreditCarryforwardAmount | 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 | 8400000.0 | 7500000.0 | 6600000.0 | 6800000.0 | 6100000.0 | 5500000.0 | 5300000.0 | 5100000.0 | 4500000.0 | 4000000.0 | 3700000.0 | 3100000.0 |
| 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 |
| 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 | 10.0 | 8.5 | 10 | 7.7 | 7.1 | 6.6 | 6.3 | 5.8 | 5.2 | 5.7 | 3.6 |
| 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 |
| 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 | 142 | 134 | 128 | 120 | 116 | 97 | 84 | 67 | 56 | 46 | 42 | 48 | 61 |
| Percentage of ValuationAllowancesAndReservesBalance | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
