Organization and Significant Accounting Policies - Activity in Polaris Accrued Warranty Reserve (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Activity in Product Warranty Reserve [Roll Forward]
Balance at beginning of year	$ 172.9	$ 132.9	$ 138.6
Reductions to reserve related to divestitures	0.0	0.0	(2.1)
Additions charged to expense	209.1	183.5	130.4
Warranty claims paid, net	(200.9)	(143.5)	(134.0)
Balance at end of year	$ 181.1	$ 172.9	$ 132.9