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Derivative Financial Instruments - Derivative Instruments and their Balance Sheet Classifications (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 24 $ 40
Derivative Assets 68 59
Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 11 27
Derivative Assets 46 40
Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 13 13
Derivative Assets 22 19
Foreign exchange contracts [Member] | Designated as Hedging Instruments [Member] | Accrued liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 8 18
Foreign exchange contracts [Member] | Not Designated As Hedging Instrument [Member] | Accrued liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 13 13
Foreign exchange contracts [Member] | Prepaid and other current assets [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Assets 33 35
Foreign exchange contracts [Member] | Prepaid and other current assets [Member] | Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Assets 21 19
Foreign exchange contracts [Member] | Other Assets [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Assets 13 5
Foreign exchange contracts [Member] | Other Assets [Member] | Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Assets 1   
Foreign exchange contracts [Member] | Other Liabilities [Member] | Designated as Hedging Instruments [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 3 9
Foreign exchange contracts [Member] | Other Liabilities [Member] | Not Designated As Hedging Instrument [Member]
   
Derivatives, Fair Value [Line Items]    
Derivative Liabilities