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Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives $ 3.7 $ 10.5
Fair Value of (Liability) Derivatives (38.7) (51.4)
Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 0.3 3.4
Fair Value of (Liability) Derivatives (2.4) (1.3)
Foreign Currency Forward Contracts [Member] | Not Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 1.9 7.1
Fair Value of (Liability) Derivatives (36.3) (49.1)
Interest Rate Swaps [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Fair Value of Asset Derivatives 1.5   
Fair Value of (Liability) Derivatives    $ (1.0)