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Derivative Financial Instruments - Derivative Instruments and their Balance Sheet Classifications (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ 40 $ 19
Derivative assets 59 105
Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities 27 6
Derivative assets 40 81
Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities 13 13
Derivative assets 19 24
Foreign exchange contracts [Member] | Prepaid and other current assets [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative assets 35 57
Foreign exchange contracts [Member] | Prepaid and other current assets [Member] | Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative assets 19 24
Foreign exchange contracts [Member] | Other Assets [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative assets 5 24
Foreign exchange contracts [Member] | Accrued liabilities [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities 18 5
Foreign exchange contracts [Member] | Accrued liabilities [Member] | Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities 13 13
Foreign exchange contracts [Member] | Other Liabilities [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ 9 $ 1