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Product Warranties - Activity Related to Product Warranty Liability (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Product Warranty Liability [Line Items]    
Reserve balance at the beginning of the year $ 16.2 $ 16.0
Provision for warranties issued 8.2 7.1
Settlements made (in cash or in kind) (8.5) (6.7)
Reserve balance at end of year $ 15.9 $ 16.4