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Derivative Financial Instruments - Derivative Instruments and their Balance Sheet Classifications (Detail) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]    
Asset Derivatives $ 4 $ 6
Liability Derivatives 31 36
Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 2 2
Liability Derivatives 23 28
Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 2 4
Liability Derivatives 8 8
Foreign Exchange Contracts [Member] | Designated as Hedging Instruments [Member] | Accrued liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives 16 17
Foreign Exchange Contracts [Member] | Not Designated as Hedging Instruments [Member] | Accrued liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives 8 6
Foreign Exchange Contracts [Member] | Prepaid and Other Current Assets [Member] | Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 2 2
Foreign Exchange Contracts [Member] | Prepaid and Other Current Assets [Member] | Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 2 4
Foreign Exchange Contracts [Member] | Other Liabilities [Member] | Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 7 11
Foreign Exchange Contracts [Member] | Other Liabilities [Member] | Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives   $ 2