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Product Warranties - Activity Related to Product Warranty Liability (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Product Warranty Liability [Line Items]    
Reserve balance at the beginning of the year $ 24.9 $ 17.2
Provision for warranties issued 6.2 6.2
Settlements made (in cash or in kind) (5.8) (6.2)
Reserve balance at end of year [1] $ 25.3 $ 17.2
[1] Balance at January 1, 2019 includes the impact of acquiring Fiberon. See Note 4 for additional information.