Derivative Instruments - Location and Fair Values of Cash Flow Hedges (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Cash Flow Hedging | Foreign exchange forward contracts | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ 12	$ 1
Cash Flow Hedging | Foreign exchange forward contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative, fair value	1	0
Net Investment Hedging | Cross currency swaps | Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative, fair value	0	0
Net Investment Hedging | Cross currency swaps | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ 48	$ 10