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Long-Term Debt and Credit Facilities - Borrowings and Repayments (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 15, 2021 | Jan. 13, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021
Long-term Debt and Credit Facilities |  |  |  |  |
Borrowings |  |  | $ 2,400 | $ 400 |
Repayments of debt |  |  | 2,600 | 350 |
Gain (loss) on extinguishment of debt |  |  | $ 214 | $ 8 |
Senior notes | 5.375% Senior Notes due 2029 |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |
Stated interest rate |  |  | 5.375% |  |
Senior notes | 6.450% Senior Notes, Series S, due 2021 (at maturity) |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |
Stated interest rate | 6.45% |  |  |  | 6.45%
Amount of debt redeemed | $ 1,200 |  |  |  |
Senior notes | 5.375% Senior Notes due 2029 |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |
Debt instrument, face amount | $ 1,000 |  |  |  |
Stated interest rate | 5.375% |  |  |  |
Senior notes | Level 3 Financing, Inc. |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |
Amount of debt redeemed |  | $ 900 |  |  |
Senior notes | Level 3 Financing, Inc. | 3.750% Sustainability-Linked Senior Notes 2029 |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |
Debt instrument, face amount |  | $ 900 |  |  |
Stated interest rate |  | 3.75% |  |  |

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