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Economic Hedges (Detail) - Economic Hedging - Derivatives Not Designated as Hedging Instruments - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings $ (80) $ (58)
Commodity contracts | Cost of Sales    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings (62) (44)
Intercompany loans and forecasted interest payments | Currency exchange contracts | Interest and other expense, net    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings 2 5
Forecasted transactions | Currency exchange contracts | Interest and other expense, net    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings (2) 8
Forecasted transactions | Currency exchange contracts | Cost of Sales    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings (17) (31)
Forecasted transactions | Currency exchange contracts | Selling, general and administrative expenses    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain / (Loss) Recognized in Earnings $ (1) $ 4