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Economic Hedges (Detail) - Economic Hedging - Derivatives Not Designated as Hedging Instruments - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Gain / (Loss) Recognized in Earnings $ (73) $ (1) $ (153) $ (59)
Commodity contracts | Cost of Sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain / (Loss) Recognized in Earnings (97) 31 (160) (13)
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 3 6 5 11
Forecasted transactions | Currency exchange contracts | Interest and other expense, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain / (Loss) Recognized in Earnings 1   (2) 8
Forecasted transactions | Currency exchange contracts | Cost of Sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain / (Loss) Recognized in Earnings 18 (46) 2 (77)
Forecasted transactions | Currency exchange contracts | Selling, general and administrative expenses        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain / (Loss) Recognized in Earnings $ 2 $ 8 $ 2 $ 12