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Derivative Instruments and Hedging Activities - Summary of Classification and Fair Values of Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Designated as Hedging Instrument [Member] | Swap [Member] | Accounts Payable [Member] | Cash Flow Hedge [Member]    
Derivative [Line Items]    
Asset derivatives $ 58 $ 25
Designated as Hedging Instrument [Member] | Swap [Member] | Other Current Liabilities [Member] | Fair Value Hedge [Member]    
Derivative [Line Items]    
Liability derivatives (9) (2)
Designated as Hedging Instrument [Member] | Liabilities Derivatives - Interest Rate and Cross Currency Swaps [Member] | Accounts Payable [Member]    
Derivative [Line Items]    
Liability derivatives (41) (96)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Non-current Assets [Member]    
Derivative [Line Items]    
Asset derivatives 18 17
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accounts Payable [Member]    
Derivative [Line Items]    
Liability derivatives $ (26) $ (15)