Derivative Instruments - Schedule of Fair Value of Outstanding Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets	$ 135	$ 320
Derivative liabilities	122	67
Foreign Exchange Contract | Foreign currency exchange contracts designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	45	170
Foreign Exchange Contract | Foreign currency exchange contracts designated as hedging instruments | Other assets (non-current)
Derivatives, Fair Value [Line Items]
Derivative assets	1	11
Foreign Exchange Contract | Foreign currency exchange contracts designated as hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	58	3
Foreign Exchange Contract | Foreign currency exchange contracts designated as hedging instruments | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	13	0
Foreign Exchange Contract | Foreign currency exchange contracts not designated as hedging instruments | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	89	139
Foreign Exchange Contract | Foreign currency exchange contracts not designated as hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 51	$ 64