Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, Gross	$ 466.6	$ 476.2	$ 472.4	$ 478.4
Accumulated goodwill impairment losses	(81.1)	(81.1)	(81.1)	(81.1)
Currency translation effect on foreign goodwill balances	(5.8)	(2.2)
Goodwill	385.5	395.1	391.3	397.3
Off-Road Segment
Goodwill [Roll Forward]
Goodwill, Gross	172.0	172.6	172.5	172.4
Accumulated goodwill impairment losses	(60.8)	(60.8)	(60.8)	(60.8)
Currency translation effect on foreign goodwill balances	(0.5)	0.2
Goodwill	111.2	111.8	111.7	111.6
On-Road Segment
Goodwill [Roll Forward]
Goodwill, Gross	67.5	76.5	72.8	78.9
Accumulated goodwill impairment losses	(20.3)	(20.3)	(20.3)	(20.3)
Currency translation effect on foreign goodwill balances	(5.3)	(2.4)
Goodwill	47.2	56.2	52.5	58.6
Marine Segment
Goodwill [Roll Forward]
Goodwill, Gross	227.1	227.1	227.1	227.1
Goodwill	$ 227.1	$ 227.1	$ 227.1	$ 227.1