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Hedges and Derivative Financial Instruments - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Net hedge ineffectiveness gain (loss)	$ 0	$ 0
Gain (loss) on derivative instruments included in AOCI	78,000,000
Derivatives accounted for as hedges(1) | Cross-currency swaps
Derivative [Line Items]
Notional amount	1,275,000,000	1,275,000,000
Derivatives accounted for as hedges(1) | Interest rate derivatives
Derivative [Line Items]
Notional amount	$ 300,000,000	$ 300,000,000

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Amount of gain (loss) from the ineffectiveness of the hedge.

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-Publisher FASB
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-SubTopic 25
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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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