Derivative Instruments - Schedule of Gains and Losses Recognized on Consolidated Statements of Operations for Derivative Instruments (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	$ 67	$ 65	$ (111)
Amount of Gain (Loss) Reclassified from AOCI into Net Income	5	17	(3)
Amount of Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	11	5	8
Derivatives designated as net investment hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gain (loss) recognized in earnings	(9)	4	(64)
Cross-currency swap agreements \| Derivatives designated as cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	7	13	(21)
Amount of Gain (Loss) Reclassified from AOCI into Net Income	5	17	(3)
Amount of Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	1	1	0
Cross-currency swap agreements \| Derivatives designated as net investment hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	55	52	(100)
Amount of Gain (Loss) Reclassified from AOCI into Net Income	0	0	0
Amount of Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	10	4	8
Interest rate swaps \| Derivatives designated as cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	5	0	2
Amount of Gain (Loss) Reclassified from AOCI into Net Income	0	0	0
Amount of Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	0
Foreign currency denominated notes \| Derivatives designated as net investment hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative	0	0	8
Amount of Gain (Loss) Reclassified from AOCI into Net Income	0	0	0
Amount of Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0	$ 0

Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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