Financial Services Arrangements - Financial Information for Polaris Acceptance Reflecting Effects of Securitization Facility (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Net income from continuing operations	$ 110.8	$ 502.8	$ 447.1
Total Assets	5,525.2	5,516.3
Total Liabilities and Partners' Capital	5,525.2	5,516.3
Polaris Acceptance
Schedule of Investments [Line Items]
Revenues	121.5	94.3	49.7
Interest and operating expenses	13.9	11.4	19.5
Net income from continuing operations	107.6	82.9	$ 30.2
Finance receivables, net	1,842.2	1,927.5
Other assets	0.0	8.4
Total Assets	1,842.2	1,935.9
Notes Payable	1,534.5	1,607.6
Other liabilities	34.3	46.1
Partners' capital	273.4	282.2
Total Liabilities and Partners' Capital	$ 1,842.2	$ 1,935.9