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SEGMENT INFORMATION - Reportable Segment Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information |  |  |
Total revenues | $ 16,222.1 | $ 13,481.9 | $ 10,600.2
Gross profit | 2,965.2 | 2,440.7 | 1,734.1
SG&A expenses | 1,783.3 | 1,477.2 | 1,138.2
Depreciation and amortization expense | 88.4 | 77.4 | 73.5
Floorplan interest expense | 27.3 | 27.6 | 39.2
Other interest expense, net | 77.5 | 55.8 | 61.9
Income before income taxes | 985.3 | 800.9 | 380.8
Real estate related capital expenditures | 39.6 | 45.9 | 24.1
Non-real estate related capital expenditures | 115.5 | 96.2 | 71.5
Total capital expenditures | 155.1 | 142.1 | 95.5
U.S. |  |  |
Segment Reporting Information |  |  |
Total revenues | 13,427.1 | 10,846.3 | 8,503.4
Gross profit | 2,582.3 | 2,089.5 | 1,486.0
SG&A expenses | 1,516.9 | 1,234.9 | 947.0
Depreciation and amortization expense | 73.1 | 60.4 | 57.7
Floorplan interest expense | 21.4 | 22.2 | 32.2
Other interest expense, net | 71.0 | 48.5 | 55.0
Income before income taxes | 897.4 | 721.8 | 366.6
Real estate related capital expenditures | 17.7 | 18.9 | 12.9
Non-real estate related capital expenditures | 100.2 | 82.3 | 60.9
Total capital expenditures | 117.8 | 101.2 | 73.8
U.K. |  |  |
Segment Reporting Information |  |  |
Total revenues | 2,795.1 | 2,635.6 | 2,096.8
Gross profit | 382.9 | 351.2 | 248.1
SG&A expenses | 266.5 | 242.2 | 191.2
Depreciation and amortization expense | 15.2 | 17.0 | 15.8
Floorplan interest expense | 5.9 | 5.4 | 7.1
Other interest expense, net | 6.6 | 7.3 | 6.9
Income before income taxes | 87.9 | 79.2 | 14.2
Real estate related capital expenditures | 22.0 | 27.0 | 11.2
Non-real estate related capital expenditures | 15.3 | 13.9 | 10.6
Total capital expenditures | $ 37.3 | $ 40.9 | $ 21.8

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