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Changes in Company's Warranty Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning Balance $ 6.8 $ 6.7
Provisions to expense 10.1 5.8
Actual costs incurred (8.5) (5.7)
Ending Balance $ 8.4 $ 6.8