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GOODWILL AND FRANCHISE VALUE - Schedule of Goodwill (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Dec. 31, 2008
Goodwill [Roll Forward]      
Beginning balance $ 977.3 $ 593.0  
Additions through acquisitions 500.4 395.5  
Reductions through divestitures (14.6) (11.2)  
Ending balance 1,463.1 977.3  
Accumulated impairment loss     $ 299.3
Corporate and other      
Goodwill [Roll Forward]      
Beginning balance 0.0 0.0  
Additions through acquisitions 23.0 0.0  
Reductions through divestitures 0.0 0.0  
Ending balance 23.0 0.0  
Domestic | Operating segments      
Goodwill [Roll Forward]      
Beginning balance 304.0 204.5  
Additions through acquisitions 121.0 101.0  
Reductions through divestitures (5.8) (1.5)  
Ending balance 419.2 304.0  
Import | Operating segments      
Goodwill [Roll Forward]      
Beginning balance 468.2 287.9  
Additions through acquisitions 219.1 188.7  
Reductions through divestitures (8.8) (8.4)  
Ending balance 678.5 468.2  
Luxury | Operating segments      
Goodwill [Roll Forward]      
Beginning balance 205.1 100.6  
Additions through acquisitions 137.3 105.8  
Reductions through divestitures 0.0 (1.3)  
Ending balance $ 342.4 $ 205.1