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Activity Related to Product Warranty Liability (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Product Warranty Liability [Line Items]      
Reserve balance at the beginning of the year $ 14.3 $ 13.9 $ 12.6
Provision for warranties issued 20.1 17.5 18.9
Settlements made (in cash or in kind) (19.2) (17.1) (17.6)
Reserve balance at end of year $ 15.2 $ 14.3 $ 13.9