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v3.21.2

Long-Term Debt and Short-Term Borrowings - Long-Term Debt Maturities and Extinguishments (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Interest rate contracts |  |  |  |
Debt instrument |  |  |  |
Derivative notional amount |  | $ 650 |  |
Fixed rate medium term note due 2022 |  |  |  |
Debt instrument |  |  |  |
Interest rate, stated percentage (as a percent) | 2.75% |  | 2.75% |
Loss on early debt extinguishment | $ 11 |  | $ 11 |
Debt redeemed | $ 450 |  |  |
Fixed rate registered note due 2049 |  |  |  |
Debt instrument |  |  |  |
Principal amount |  | 500 |  | $ 1,000
Fixed rate registered note due 2050 |  |  |  |
Debt instrument |  |  |  |
Principal amount |  | $ 150 |  | $ 650
Seven-year floating rate note |  |  |  |
Debt instrument |  |  |  |
Variable rate |  | three-month LIBOR |  |

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