v3.26.1
Long-Term Debt and Credit Facilities - Supplemental Indentures and Lumen Parent Guarantee (Details) - Level 3 Financing, Inc. - Subsequent Event - Senior Notes
Apr. 30, 2026
First Lien Notes Due 2033  
Long-term Debt and Credit Facilities  
Stated interest rate (as a percent) 6.875%
First Lien Notes Due 2034  
Long-term Debt and Credit Facilities  
Stated interest rate (as a percent) 7.00%