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Long-Term Debt and Credit Facilities - Schedule of Debt Repayments (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 15, 2021
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  | $ 8,202 | $ 3,538 |
Senior notes | 5.800% Senior Notes due 2022 (at maturity) |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  | 5.80% |  |  |  |  |  |  |
Repayments of debt |  |  | $ 1,400 |  |  |  |  |  |  |
Senior notes | 6.750% Senior Notes, Series W, due 2023 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 6.75% |  |  |  |  |  |  | 6.75% |  |
Repayments of debt | $ 750 |  |  |  |  |  |  |  |  |
Senior notes | 7.500% Senior Notes, Series Y, due 2024 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 7.50% | 7.50% |  |  |  |  |  | 7.50% |  |
Repayments of debt | $ 982 | $ 18 |  |  |  |  |  |  |  |
Senior notes | 5.625% Senior Notes, Series X, due 2025 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 5.625% |  |  |  |  |  |  | 5.625% |  |
Repayments of debt | $ 286 |  |  |  |  |  |  |  |  |
Senior notes | 7.200% Senior Notes, Series D, due 2025 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 7.20% |  |  |  |  |  |  | 7.20% |  |
Repayments of debt | $ 34 |  |  |  |  |  |  |  |  |
Senior notes | 5.125% Senior Notes due 2026 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 5.125% | 5.125% |  |  |  |  |  | 5.125% |  |
Repayments of debt | $ 520 | $ 11 |  |  |  |  |  |  |  |
Senior notes | 6.875% Debentures, Series G, due 2028 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 6.875% |  |  |  |  |  |  | 6.875% |  |
Repayments of debt | $ 130 |  |  |  |  |  |  |  |  |
Senior notes | 5.375% Senior Notes due 2029 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate | 5.375% |  |  |  |  |  |  | 5.375% |  |
Repayments of debt | $ 494 |  |  |  |  |  |  |  |  |
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%
Repayments of debt |  |  |  |  |  | $ 1,231 |  |  |  |
Term loan | Term Loan B |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt | 909 |  |  |  |  |  |  |  |  |
Term loan | Scheduled term loan payments |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  |  | $ 125 | $ 125 |
Other |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt | 68 |  |  |  |  |  |  |  |  |
Level 3 Financing, Inc. | Senior notes | 5.375% Senior Notes due 2025 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  | 5.375% |  |  |  |  |  |  |  |
Repayments of debt |  | $ 800 |  |  |  |  |  |  |  |
Level 3 Financing, Inc. | Senior notes | 5.250% Senior Notes due 2026 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  | 5.25% |  |  |  |  |  |  |  |
Repayments of debt |  | $ 775 |  |  |  |  |  |  |  |
Level 3 Financing, Inc. | Senior notes | 5.375% Senior Notes due 2024 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 5.375% |  |  |
Repayments of debt |  |  |  |  |  |  | $ 900 |  |  |
Level 3 Financing, Inc. | Term loan | Tranche B 2027 Term Loan |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | $ 700 |  |  |  |  |  |  |  |
Embarq Corporation Subsidiaries | First mortgage bonds | First Mortgage Bonds |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt | 137 |  |  |  |  |  |  |  |  |
Qwest Corporation, Inc. | Senior notes | 6.750% Senior Notes (at maturity) |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 6.75% |  |  |  |  | 6.75% |
Repayments of debt |  |  |  | $ 950 |  |  |  |  |  |
Qwest Corporation, Inc. | Senior notes | 7.000% Senior Notes due 2056 |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 7.00% |  |  |
Repayments of debt |  |  |  |  |  |  | $ 235 |  |  |
Qwest Capital Funding, Inc. | Senior notes |  |  |  |  |  |  |  |  |  |
Long-term Debt and Credit Facilities |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 63 |  |  |  | $ 97 |  |  |  |  |

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