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