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Derivatives and Hedging Activities - Effect of Derivative Instruments on Consolidated Statements of Operations (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivative Instruments Gain Loss [Line Items]    
Amount of Gain (Loss) Recognized in Earnings on Derivatives $ (6.2) $ 4.6
Designated as Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
   
Derivative Instruments Gain Loss [Line Items]    
Amount of Gain (Loss) Recognized in Earnings on Derivatives 2.3   
Not Designated as Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
   
Derivative Instruments Gain Loss [Line Items]    
Amount of Gain (Loss) Recognized in Earnings on Derivatives $ (8.5) $ 4.6