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Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Restricted cash | $ 52 | $ 55
Carrying value |  |
Derivative [Line Items] |  |
Long-term debt, less amount due within one year | 5,777 | 4,906
Fair value |  |
Derivative [Line Items] |  |
Long-term debt, less amount due within one year | $ 5,636 | $ 5,337

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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