Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Fair Value Measurements - Fair Value of Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative designated as hedging instrument	$ 0	$ 1	$ 0	$ 5
Interest rate swap \| Accrued liabilities/Other liabilities
Derivatives, Fair Value [Line Items]
Derivative fair value	8		8		$ 22
Derivative designated as hedging instrument	(5)			$ (14)
Interest rate swap \| Other assets
Derivatives, Fair Value [Line Items]
Derivative fair value	39		39		$ 14
Cross-currency interest rate swaps \| Other assets
Derivatives, Fair Value [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ 12		$ 25