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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Fair Value, Inputs, Level 2 [Member]
Mar. 31, 2014
Minimum [Member]
Mar. 31, 2014
Maximum [Member]
Derivatives, Fair Value [Line Items]          
Maximum Derivative Financial Instrument's Term (months)       2 months 24 months
Derivative Assets $ 68 $ 59 $ 68    
Derivative Liabilities 24 40 24    
Fair value of the Company's foreign currency forward contracts $ 44