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Long-Term Debt and Note Payable - Affiliate - Additional Information (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2017
Long-term debt |  |  |
Note payable - affiliate | $ 1,215,000,000 | $ 1,187,000,000 |
Note payable - affiliate | Affiliated entity |  |  |
Long-term debt |  |  |
Note payable - affiliate | 1,215,000,000 | $ 1,187,000,000 |
Note payable - affiliate | Affiliated entity | Qwest Corporation |  |  |
Long-term debt |  |  |
Note payable - affiliate funding commitment |  |  | $ 965,000,000
Interest costs capitalized | 251,000,000 |  |
Accrued interest on note payable - affiliate | $ 14,000,000 |  |

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