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REVENUES - Revenues Disaggregated by Revenue Source and Geographical Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | $ 3,509.2 | $ 3,039.6 | $ 10,219.7 | $ 7,861.7
U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 2,662.4 | 2,244.6 | 7,991.6 | 6,083.3
U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 750.4 | 740.8 | 2,000.7 | 1,595.0
Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 96.4 | 54.3 | 227.3 | 183.4
Total new and used vehicle sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 2,933.9 | 2,534.6 | 8,603.6 | 6,494.8
Total new and used vehicle sales | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 2,178.8 | 1,825.2 | 6,620.2 | 4,917.8
Total new and used vehicle sales | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 671.5 | 664.2 | 1,788.7 | 1,420.4
Total new and used vehicle sales | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 83.6 | 45.2 | 194.7 | 156.6
New vehicle retail sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 1,576.2 | 1,580.7 | 4,974.9 | 3,985.5
New vehicle retail sales | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 1,208.5 | 1,172.2 | 3,958.9 | 3,076.3
New vehicle retail sales | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 305.4 | 376.6 | 869.7 | 800.1
New vehicle retail sales | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 62.3 | 31.9 | 146.3 | 109.1
Used vehicle retail sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 1,248.3 | 867.2 | 3,342.7 | 2,287.4
Used vehicle retail sales | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 902.3 | 608.2 | 2,481.7 | 1,719.4
Used vehicle retail sales | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 328.0 | 248.1 | 820.5 | 529.7
Used vehicle retail sales | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 18.0 | 10.9 | 40.5 | 38.3
Used vehicle wholesale sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 109.4 | 86.7 | 286.0 | 221.9
Used vehicle wholesale sales | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 68.0 | 44.8 | 179.6 | 122.1
Used vehicle wholesale sales | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 38.1 | 39.5 | 98.4 | 90.6
Used vehicle wholesale sales | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 3.3 | 2.4 | 8.0 | 9.2
Parts and service sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 427.6 | 375.6 | 1,180.4 | 1,028.2
Parts and service sales | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 353.1 | 306.4 | 982.0 | 865.2
Parts and service sales | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 63.4 | 61.3 | 170.2 | 139.5
Parts and service sales | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 11.1 | 8.0 | 28.2 | 23.4
Finance, insurance and other, net |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 147.7 | 129.5 | 435.7 | 338.7
Variable consideration recognized relating to performance obligations satisfied in previous period | 5.1 | 7.6 | 18.7 | 16.9
Finance, insurance and other, net | U.S. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 130.5 | 113.0 | 389.4 | 300.2
Finance, insurance and other, net | U.K. |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | 15.6 | 15.4 | 41.9 | 35.1
Finance, insurance and other, net | Brazil |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue from contract with customer | $ 1.7 | $ 1.1 | $ 4.4 | $ 3.4

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