Derivative Instruments - Schedule of Derivative Instruments Measured at Fair Value in Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivative Assets
Fair Value	$ 1	$ 7
Derivative Liabilities
Fair Value	(25)	(81)
Level 2 \| Cross-currency swap agreements \| Derivatives designated as hedges: \| Other Long Term Assets and Other Long Term Liabilities
Derivatives, Fair Value [Line Items]
Notional Amount	1,233	1,270
Level 2 \| Cross-currency swap agreements \| Derivatives designated as hedges: \| Other long-term assets
Derivative Assets
Fair Value	0	0
Level 2 \| Cross-currency swap agreements \| Derivatives designated as hedges: \| Other long-term liabilities
Derivative Liabilities
Fair Value	(18)	(81)
Level 2 \| Interest rate swaps \| Derivatives designated as hedges: \| Other Current Assets and Other Current Liabilities
Derivatives, Fair Value [Line Items]
Notional Amount	2,003
Level 2 \| Interest rate swaps \| Derivatives designated as hedges: \| Other current assets
Derivative Assets
Fair Value	0
Level 2 \| Interest rate swaps \| Derivatives designated as hedges: \| Other current liabilities
Derivative Liabilities
Fair Value	(7)
Level 2 \| Foreign currency option contracts \| Derivatives not designated as hedges: \| Other Current Assets and Other Current Liabilities
Derivatives, Fair Value [Line Items]
Notional Amount	365	473
Level 2 \| Foreign currency option contracts \| Derivatives not designated as hedges: \| Other current assets
Derivative Assets
Fair Value	1	7
Level 2 \| Foreign currency option contracts \| Derivatives not designated as hedges: \| Other current liabilities
Derivative Liabilities
Fair Value	$ 0	$ 0

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Nominal or face amount used to calculate payment on derivative.

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