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Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Detail) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Intangible Assets by Major Class [Line Items]    
Total other intangible assets, net $ 517.7 $ 524.4
Total other intangible assets, net $ 610.9 604.4
Dealer/customer related    
Intangible Assets by Major Class [Line Items]    
Weighted-average useful life (years) 19 years  
Cost $ 341.6 341.7
Accumulated amortization (93.2) (80.0)
Net 248.4 261.7
Brand/trade names    
Intangible Assets by Major Class [Line Items]    
Non-amortizable—brand/trade names $ 269.3 $ 262.7