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Economic Hedges (Detail) (Derivatives Not Designated as Hedging Instruments, Economic Hedges, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings $ 161 $ 117 $ 173
Interest rate contracts | Interest And Other Expense
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings   3 (3)
Commodity contracts | Cost of sales
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings 65 100 135
Forecasted transactions | Foreign exchange contracts | Interest And Other Expense
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings 9 (17) 3
Forecasted transactions | Foreign exchange contracts | Cost of sales
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings 65 7 4
Forecasted transactions | Foreign exchange contracts | Selling, General and Administrative Expenses
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings 4    
Forecasted Interest Payments | Intercompany loans | Foreign exchange contracts | Interest And Other Expense
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain / (Loss) Recognized in Earnings $ 18 $ 24 $ 34