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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative assets $ 59 $ 105
Derivative liabilities 40 19
Fair value of the Company's foreign currency forward contracts 19  
Fair Value, Inputs, Level 2 [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative assets 59  
Derivative liabilities $ 40