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Inventories
 3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consist of the following:
March 31, 2024December 31, 2023
(In millions)
New vehicles$938.5 $799.6 
Used vehicles481.5 505.7 
Service loaners (1)177.8 172.7 
Parts, accessories and other102.7 100.3 
Inventories$1,700.5 $1,578.3