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Derivative Financial Instruments - Derivative Instruments and their Balance Sheet Classifications (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 6 $ 33
Derivative Liabilities 36 11
Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets 2 21
Derivative Liabilities 28 5
Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets 4 12
Derivative Liabilities 8 6
Foreign Exchange Contracts [Member] | Designated as Hedging Instruments [Member] | Accrued liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 17 3
Foreign Exchange Contracts [Member] | Not Designated as Hedging Instruments [Member] | Accrued liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 6 5
Foreign Exchange Contracts [Member] | Prepaid and Other Current Assets [Member] | Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets 2 13
Foreign Exchange Contracts [Member] | Prepaid and Other Current Assets [Member] | Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets 4 10
Foreign Exchange Contracts [Member] | Other Assets [Member] | Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets   8
Foreign Exchange Contracts [Member] | Other Assets [Member] | Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Assets   2
Foreign Exchange Contracts [Member] | Other Liabilities [Member] | Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 11 2
Foreign Exchange Contracts [Member] | Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 2 $ 1