v3.26.1
Revenues - Retail Automotive Dealership (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues    
Total revenues $ 7,863.6 $ 7,953.8
Retail automotive dealership    
Revenues    
Total revenues 6,967.1 6,918.6
Retail automotive dealership | U.S.    
Revenues    
Total revenues 3,880.6 4,040.3
Retail automotive dealership | U.K.    
Revenues    
Total revenues 2,347.7 2,323.2
Retail automotive dealership | Germany, Italy, Japan, and Australia    
Revenues    
Total revenues 738.8 555.1
Retail automotive dealership | New vehicle    
Revenues    
Total revenues 3,080.7 3,248.0
Retail automotive dealership | Used vehicle    
Revenues    
Total revenues 2,429.4 2,264.1
Retail automotive dealership | Finance and insurance, net    
Revenues    
Total revenues 202.3 205.4
Retail automotive dealership | Service and parts    
Revenues    
Total revenues 863.9 825.6
Retail automotive dealership | Fleet and wholesale    
Revenues    
Total revenues $ 390.8 $ 375.5