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Location and Fair Value of Derivative Instruments Segregated Between Designated and Not Designated Hedging Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets $ 15.3 $ 17.9
Fair value of derivative liability 0.4 6.4
Fair value of derivative assets   3.8
Derivatives Designated as Hedging Instruments | Forward currency contracts | Other Current Assets
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 1.4 1.5
Derivatives Designated as Hedging Instruments | Forward currency contracts | Accrued Expenses
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liability 0.4 6.4
Derivatives Designated as Hedging Instruments | Option currency contracts | Other Current Assets
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 0.6 4.3
Derivatives Designated as Hedging Instruments | Interest rate swap contract | Other Assets
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 13.3 12.1
Derivatives Not Designated as Hedging Instruments | Forward currency contracts | Other Current Assets
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets   $ 3.8