Financial Services Arrangements - Financial Information for Polaris Acceptance Reflecting Effects of Securitization Facility (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Net income	$ 502.8	$ 447.1	$ 493.9
Total Assets	5,516.3	5,217.9
Total Liabilities and Partners' Capital	5,516.3	5,217.9
Polaris Acceptance
Schedule of Investments [Line Items]
Revenues	94.3	49.7	21.9
Interest and operating expenses	11.4	19.5	6.6
Net income	82.9	30.2	$ 15.3
Finance receivables, net	1,927.5	1,314.2
Other assets	8.4	20.9
Total Assets	1,935.9	1,335.1
Notes Payable	1,607.6	1,076.0
Other liabilities	46.1	73.0
Partners' capital	282.2	186.1
Total Liabilities and Partners' Capital	$ 1,935.9	$ 1,335.1
Polaris Acceptance | Maximum
Schedule of Investments [Line Items]
Aggregate repurchase obligation	15.00%