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Product Warranties - Activity Related to Product Warranty Liability (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Product Warranty Liability [Line Items]    
Reserve balance at the beginning of the year $ 16.0 $ 13.0
Provision for warranties issued 7.1 7.1
Settlements made (in cash or in kind) (6.7) (6.6)
Reserve balance at end of year $ 16.4 $ 13.5