Basis of Presentation and Significant Accounting Policies - Activity in Polaris Accrued Warranty Reserve (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Activity in Product Warranty Reserve [Roll Forward]
Balance at beginning of period	$ 154.0	$ 126.1	$ 172.9	$ 132.9
Additions charged to expense	47.9	33.6	92.4	60.7
Warranty claims paid, net	(47.3)	(31.0)	(110.7)	(64.9)
Balance at end of period	$ 154.6	$ 128.7	$ 154.6	$ 128.7