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Financial Instruments and Risk Management - Fair Value of Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives $ 2 $ 6
Total Liability Derivatives (45) (25)
Foreign Exchange Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 2  
Total Liability Derivatives (33)  
Currency Collars [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 0  
Total Liability Derivatives (12)  
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 1 5
Total Liability Derivatives (43) (24)
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 1 3
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Payables and Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Total Liability Derivatives (31) (18)
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives   1
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Payables and Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Total Liability Derivatives (11) (6)
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives   1
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Long-term Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Total Liability Derivatives (1)  
Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 1 1
Total Liability Derivatives (2) (1)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 1 1
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Payables and Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Total Liability Derivatives $ (2) $ (1)