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Long-Term Debt and Credit Facilities - Covenants and Guarantees (Details)
Dec. 31, 2022
USD ($)
Letter of Credit | Uncommitted Revolving Letter of Credit Facility  
Long-term Debt and Credit Facilities  
Maximum borrowing capacity $ 225,000,000
Credit facility | Letter of Credit | Uncommitted Revolving Letter of Credit Facility  
Long-term Debt and Credit Facilities  
Maximum borrowing capacity $ 225,000,000
Maximum  
Long-term Debt and Credit Facilities  
Leverage ratio 4.75
Maximum | Qwest Corporation  
Long-term Debt and Credit Facilities  
EBITDA ratio 2.85
Minimum  
Long-term Debt and Credit Facilities  
Coverage ratio 2.00