v3.26.1
Long-Term Debt and Credit Facilities - Level 3 Financing Credit Agreement (Details) - Level 3 Financing, Inc. - Term Loan - Term Loan B-5 - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Long-term Debt and Credit Facilities    
Long-term debt, gross $ 2,400 $ 2,400
Basis spread (as a percent) 2.75%  
Debt instrument, floor interest rate (as a percent) 0.00%  
Prepayment from net cash proceeds of certain asset sales (as a percent) 100.00%  
Prepayment from net cash proceeds of certain debt issuances (as a percent) 100.00%  
Federal Funds Rate    
Long-term Debt and Credit Facilities    
Basis spread (as a percent) 0.50%  
One Month SOFR Rate    
Long-term Debt and Credit Facilities    
Basis spread (as a percent) 1.00%  
SOFR    
Long-term Debt and Credit Facilities    
Basis spread (as a percent) 2.75%  
Base Rate    
Long-term Debt and Credit Facilities    
Basis spread (as a percent) 1.75%