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Long-Term Debt and Credit Facilities - Schedule of Debt Repayments (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Long-term Debt and Credit Facilities |  |
Borrowings | $ 2,400 |
Repayments of debt | 2,300 |
Gain from repayments of debt | 9 | $ 8
Repayments of debt | $ 3,705 |
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 |
Other |  |
Long-term Debt and Credit Facilities |  |
Repayments of debt | $ 30 |
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. | Term Loan | Tranche B 2027 Term Loan |  |
Long-term Debt and Credit Facilities |  |
Repayments of debt | $ 700 |

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