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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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