v3.26.1
Long-Term Debt and Credit Facilities - Lumen Credit Agreements (Details) - Line of Credit - Revolving Credit Facility - USD ($)
Jun. 30, 2026
Apr. 14, 2026
Dec. 31, 2025
Long-term Debt and Credit Facilities      
Long-term debt, gross $ 0   $ 0
Maximum borrowing capacity 825,000,000 $ 825,000,000  
Available borrowing capacity $ 660,000,000