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Location on the Balance Sheet of Derivative Assets and Liabilities (Detail) - Fair Value, Inputs, Level 2 - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Asset Derivatives    
Asset Derivatives $ 400 $ 487
Derivative Asset, Fair Value, Net 370 462
Derivative Liabilities [Abstract]    
Liability Derivatives 41 45
Derivative Liability, Fair Value, Amount Offset Against Collateral 11 20
Designated as Hedging Instrument | Foreign Exchange Contracts | Other current assets    
Asset Derivatives    
Asset Derivatives 134 176
Derivative Asset, Fair Value, Net 134 176
Designated as Hedging Instrument | Foreign Exchange Contracts | Other noncurrent assets    
Asset Derivatives    
Asset Derivatives 93 131
Derivative Asset, Fair Value, Net 85 126
Designated as Hedging Instrument | Foreign Exchange Contracts | Other current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 1 0
Derivative Liability, Fair Value, Amount Offset Against Collateral 1 0
Designated as Hedging Instrument | Foreign Exchange Contracts | Other non-current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 11 6
Derivative Liability, Fair Value, Amount Offset Against Collateral 3 1
Designated as Hedging Instrument | Interest Rate Contracts | Other current assets    
Asset Derivatives    
Asset Derivatives 11 0
Derivative Asset, Fair Value, Net 10 0
Designated as Hedging Instrument | Interest Rate Contracts | Other noncurrent assets    
Asset Derivatives    
Asset Derivatives 104 137
Derivative Asset, Fair Value, Net 85 119
Designated as Hedging Instrument | Interest Rate Contracts | Other current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives (1) (1)
Derivative Liability, Fair Value, Amount Offset Against Collateral 0 1
Designated as Hedging Instrument | Interest Rate Contracts | Other non-current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 23 21
Derivative Liability, Fair Value, Amount Offset Against Collateral 4 3
Not Designated as Hedging Instrument | Foreign Exchange Contracts | Other current assets    
Asset Derivatives    
Asset Derivatives 4 1
Derivative Asset, Fair Value, Net 4 1
Not Designated as Hedging Instrument | Foreign Exchange Contracts | Other current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 0 0
Derivative Liability, Fair Value, Amount Offset Against Collateral 0 0
Not Designated as Hedging Instrument | Price Risk Derivative [Member] | Other current assets    
Asset Derivatives    
Asset Derivatives 16 0
Derivative Asset, Fair Value, Net 16 0
Not Designated as Hedging Instrument | Price Risk Derivative [Member] | Other current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 0 10
Derivative Liability, Fair Value, Amount Offset Against Collateral 0 10
Not Designated as Hedging Instrument | Interest Rate Contracts | Other noncurrent assets    
Asset Derivatives    
Asset Derivatives 38 42
Derivative Asset, Fair Value, Net 36 40
Not Designated as Hedging Instrument | Interest Rate Contracts | Other non-current liabilities    
Derivative Liabilities [Abstract]    
Liability Derivatives 5 7
Derivative Liability, Fair Value, Amount Offset Against Collateral $ 3 $ 5