Derivative Instruments - Schedule of Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative assets	$ 366	$ 135
Derivative liabilities	209	122
Foreign Exchange Contract | Designated as Hedging Instrument | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	168	45
Foreign Exchange Contract | Designated as Hedging Instrument | Other assets (non-current)
Derivatives, Fair Value [Line Items]
Derivative assets	22	1
Foreign Exchange Contract | Designated as Hedging Instrument | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	58
Foreign Exchange Contract | Designated as Hedging Instrument | Other long-term liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	13
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	176	89
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 209	$ 51