v3.26.1
Segment Information - Revenues and Segment Income by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information    
Revenues $ 7,863.6 $ 7,953.8
Cost of sales 6,564.2 6,632.4
Selling, general, and administrative expenses:    
Personnel expenses 566.6 557.3
Advertising expenses 31.1 30.9
Rent & related expenses 116.5 109.2
Other expenses 251.4 254.0
Depreciation 44.8 40.6
Floor plan interest expense 38.1 42.0
Other interest expense 28.4 22.5
Equity in earnings of affiliates 40.8 33.3
Segment income 323.7 350.5
Gain on sale of dealership 60.4 52.3
Retail Automotive    
Segment Reporting Information    
Revenues 6,967.1 6,918.6
Cost of sales 5,842.1 5,782.4
Selling, general, and administrative expenses:    
Personnel expenses 483.4 472.6
Advertising expenses 29.8 29.7
Rent & related expenses 105.3 99.0
Other expenses 228.2 232.6
Depreciation 38.8 35.3
Floor plan interest expense 34.5 36.0
Other interest expense 26.5 18.0
Equity in earnings of affiliates 0.0 0.3
Segment income 238.9 265.6
Retail Commercial Truck    
Segment Reporting Information    
Revenues 694.6 823.7
Cost of sales 566.4 682.7
Selling, general, and administrative expenses:    
Personnel expenses 63.2 65.9
Advertising expenses 0.7 0.9
Rent & related expenses 6.8 6.6
Other expenses 14.4 14.9
Depreciation 4.4 3.9
Floor plan interest expense 2.3 3.7
Other interest expense 0.0 0.0
Equity in earnings of affiliates 0.0 0.0
Segment income 36.4 45.1
Other    
Segment Reporting Information    
Revenues 201.9 211.5
Cost of sales 155.7 167.3
Selling, general, and administrative expenses:    
Personnel expenses 20.0 18.8
Advertising expenses 0.6 0.3
Rent & related expenses 4.4 3.6
Other expenses 8.8 6.5
Depreciation 1.6 1.4
Floor plan interest expense 1.3 2.3
Other interest expense 1.9 4.5
Equity in earnings of affiliates 0.0 0.0
Segment income 7.6 6.8
Non-Automotive Investments    
Segment Reporting Information    
Revenues 0.0 0.0
Cost of sales 0.0 0.0
Selling, general, and administrative expenses:    
Personnel expenses 0.0 0.0
Advertising expenses 0.0 0.0
Rent & related expenses 0.0 0.0
Other expenses 0.0 0.0
Depreciation 0.0 0.0
Floor plan interest expense 0.0 0.0
Other interest expense 0.0 0.0
Equity in earnings of affiliates 40.8 33.0
Segment income $ 40.8 $ 33.0