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Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives $ 32.9 $ 10.5
Fair Value of (Liability) Derivatives (48.2) (51.5)
Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 3.1 3.4
Fair Value of (Liability) Derivatives (0.9) (1.4)
Foreign Currency Forward Contracts [Member] | Not Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 21.9 7.1
Fair Value of (Liability) Derivatives (47.3) (49.1)
Interest Rate and Currency Swap [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 0.6  
Fair Value of (Liability) Derivatives   (1.0)
Interest Rate And Currency Swaps [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives $ 7.3