Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Goodwill [Roll Forward]
Balance as of December 31, 2024	$ 393.5	$ 394.4
Currency translation effect on foreign goodwill balances	2.8	(2.0)
Balance as of March 31, 2025	396.3	392.4
Off Road
Goodwill [Roll Forward]
Balance as of December 31, 2024	116.2	116.6
Currency translation effect on foreign goodwill balances	0.1	(0.4)
Balance as of March 31, 2025	116.3	116.2
On Road
Goodwill [Roll Forward]
Balance as of December 31, 2024	46.7	50.7
Currency translation effect on foreign goodwill balances	2.7	(1.6)
Balance as of March 31, 2025	49.4	49.1
Marine
Goodwill [Roll Forward]
Balance as of December 31, 2024	230.6	227.1
Currency translation effect on foreign goodwill balances	0.0	0.0
Balance as of March 31, 2025	$ 230.6	$ 227.1