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Product Warranties - Product Warranty Activities (Parenthetical) (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Mar. 31, 2020
Other Current Liabilities [Member]    
Product Warranty Liability [Line Items]    
Short-term product warranties $ 18.4 $ 12.2
Other Noncurrent Liabilities [Member]    
Product Warranty Liability [Line Items]    
Long-term product warranties $ 3.2 $ 3.1