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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