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Organization and Significant Accounting Policies - Activity in Polaris Accrued Warranty Reserve (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Activity in Product Warranty Reserve [Roll Forward]      
Balance at beginning of year $ 140.8 $ 136.2 $ 121.8
Additions to reserve related to acquisitions     8.8
Reductions to reserve related to divestitures (2.1)    
Additions charged to expense 130.4 123.7 122.9
Warranty claims paid, net (134.0) (119.1) (117.3)
Balance at end of year $ 135.1 $ 140.8 $ 136.2