XML 163 R125.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Instruments and Risk Management - Fair Value of Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives $ 41 $ 2
Total Liability Derivatives (1) (45)
Foreign Exchange Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 28  
Total Liability Derivatives (1)  
Currency Collars [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 13  
Total Liability Derivatives (1)  
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 37 1
Total Liability Derivatives   (43)
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 24 1
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)
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 13  
Designated as Hedging Instrument [Member] | Currency Collars [Member] | Other Payables and Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Total Liability Derivatives   (11)
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 4 1
Total Liability Derivatives (1) (2)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Total Asset Derivatives 4 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 $ (1) $ (2)