v3.26.1
SEGMENT INFORMATION - Schedule of Reportable Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting        
Total revenues $ 5,385.1 $ 5,703.5 $ 10,792.2 $ 11,208.8
Cost of sales 4,524.5 4,767.8 9,053.7 9,381.1
SG&A expenses 623.5 646.1 1,224.1 1,263.4
Depreciation and amortization expense 30.9 28.7 62.1 58.0
Asset impairments 1.0 0.4 3.5 0.8
Restructuring charges 2.1 7.6 3.1 18.7
Floorplan interest expense 22.0 26.4 45.3 53.3
Other interest expense, net 46.7 42.7 95.5 82.5
Other segment items   0.0   (0.2)
Income (loss) before income taxes 134.4 183.9 304.9 351.4
Real estate related capital expenditures 0.8 17.7 35.0 32.5
Non-real estate related capital expenditures 42.0 54.0 91.8 91.4
Total capital expenditures 42.8 71.7 126.8 123.9
U.S.        
Segment Reporting        
Total revenues 3,933.4 4,177.2 7,697.2 8,098.9
Cost of sales 3,274.9 3,448.5 6,391.5 6,695.3
SG&A expenses 444.3 471.6 862.5 919.0
Depreciation and amortization expense 23.9 22.2 47.3 43.2
Asset impairments 0.0 0.4 1.9 (1.9)
Restructuring charges 0.0 0.0 0.0 0.0
Floorplan interest expense 14.8 20.1 31.0 40.8
Other interest expense, net 40.7 34.9 83.6 67.2
Other segment items   0.0   (0.2)
Income (loss) before income taxes 134.7 179.6 279.3 335.7
Real estate related capital expenditures 0.8 17.7 11.6 32.5
Non-real estate related capital expenditures 36.2 45.8 79.6 79.4
Total capital expenditures 37.0 63.5 91.2 111.9
U.K.        
Segment Reporting        
Total revenues 1,451.7 1,526.4 3,094.9 3,109.9
Cost of sales 1,249.6 1,319.3 2,662.2 2,685.8
SG&A expenses 179.2 174.5 361.5 344.3
Depreciation and amortization expense 7.0 6.5 14.7 14.8
Asset impairments 1.0 0.0 1.6 2.7
Restructuring charges 2.1 7.6 3.1 18.7
Floorplan interest expense 7.2 6.3 14.3 12.5
Other interest expense, net 6.0 7.8 11.9 15.3
Other segment items   0.0   0.0
Income (loss) before income taxes (0.3) 4.3 25.6 15.7
Real estate related capital expenditures 0.0 0.0 23.4 0.0
Non-real estate related capital expenditures 5.8 8.2 12.2 12.0
Total capital expenditures $ 5.8 $ 8.2 $ 35.6 $ 12.0