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Commitments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Commitment And Contingencies [Line Items]      
Purchase obligations $ 298.8    
Purchase obligations due in one year 283.9    
Operating leases, rent expense net $ 47.9 $ 49.3 $ 35.2