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Notional Values of Derivative Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Foreign exchange contracts | Intercompany Loans And Forecasted Interest Payments
   
Derivative [Line Items]    
Notional Amount $ 4,369 $ 3,743
Foreign exchange contracts | Forecasted transactions
   
Derivative [Line Items]    
Notional Amount 2,565 1,663
Commodity contracts
   
Derivative [Line Items]    
Notional Amount 805 620
Interest rate contracts
   
Derivative [Line Items]    
Notional Amount 2,273 2,259
Net Investment Hedging | Euro Notes
   
Derivative [Line Items]    
Notional Amount 4,466 1,121
Net Investment Hedging | Pound Sterling Notes
   
Derivative [Line Items]    
Notional Amount $ 1,076 $ 1,057