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Product Warranties - Activity Related to Product Warranty Liability (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Product Warranty Liability [Line Items]    
Reserve balance at the beginning of the year $ 16.2 $ 16.0
Provision for warranties issued 23.3 23.8
Settlements made (in cash or in kind) (17.0) (22.8)
Foreign translation adjustments (1.2)  
Acquisitions 0.7 0.4
Reserve balance at end of year $ 22.0 $ 17.4