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Inventories and Related Notes Payable - Floor Plan (Tables)
 12 Months Ended
Dec. 31, 2024
Inventory Disclosure [Abstract]  
Components of Inventories
Inventories consist of the following:
 December 31, 2024December 31, 2023
 (In millions)
New vehicles$1,146.0 $799.6 
Used vehicles514.4 505.7 
Service loaners (1)
184.9 172.7 
Parts, accessories and other112.4 100.3 
Inventories$1,957.7 $1,578.3