v3.20.4

Debt - Outstanding Debt, Debt Issuance Costs, Premium (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
Long-term debt | $ 7,609 | $ 7,365
Debt issuance costs | 33 |
Debt discount | $ 8 |
Average remaining term (in years) | 5 years 3 months 18 days |
Interest accrued for debt | $ 57 | $ 52
Secured Debt |  |
Debt Instrument [Line Items] |  |
Average remaining term (in years) | 5 years 3 months 18 days |

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