v3.26.1
Long-Term Debt and Credit Facilities - Repurchases of Debt Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Jun. 11, 2026
May 21, 2026
Mar. 31, 2026
Feb. 02, 2026
Jan. 09, 2026
Long-term Debt and Credit Facilities            
Principal Amount Repurchased $ 14     $ 5 $ 4,765  
5.375% Senior Notes due 2029            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent) 5.375%          
Level 3 Financing, Inc.            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased     $ 766     $ 607
Level 3 Financing, Inc. | 3.750% Senior Notes due 2029            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent) 3.75%          
Level 3 Financing, Inc. | 4.000% Senior Notes due 2031            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent) 4.00%          
Senior Notes | 5.375% Senior Notes due 2029            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased $ 7          
Senior Notes | 4.125% Superpriority Senior Secured Notes Due 2029            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)         4.125%  
Principal Amount Repurchased         $ 331  
Senior Notes | 4.125% Superpriority Senior Secured Notes Due 2030            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)         4.125%  
Principal Amount Repurchased         $ 477  
Senior Notes | 10.000% Secured Notes due 2032            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)         10.00%  
Principal Amount Repurchased         $ 439  
Senior Notes | Level 3 Financing, Inc. | 3.750% Senior Notes due 2029            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)     3.75%      
Principal Amount Repurchased 3   $ 302      
Senior Notes | Level 3 Financing, Inc. | 4.000% Senior Notes due 2031            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased $ 4          
Senior Notes | Level 3 Financing, Inc. | 4.875% Second Lien Notes due 2029            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)       4.875%   4.875%
Principal Amount Repurchased       $ 1   $ 595
Senior Notes | Qwest Corporation | 6.875% Senior Notes due 2028            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)       6.875%    
Principal Amount Repurchased       $ 4    
Senior Notes | Qwest Corporation | 6.500% Notes due 2051            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)   6.50%        
Senior Notes | Qwest Corporation | 6.750% Notes due 2052            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)   6.75%        
Senior Notes | Qwest Corporation | 6.500% Notes due 2056            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)   6.50%        
Senior Notes | Qwest Corporation | 6.750% Notes due 2057            
Long-term Debt and Credit Facilities            
Stated interest rate (as a percent)   6.75%        
Term Loan | Superpriority Term Loan A            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased         338  
Term Loan | Superpriority Term Loan B-1            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased         1,590  
Term Loan | Superpriority Term Loan B-2            
Long-term Debt and Credit Facilities            
Principal Amount Repurchased         $ 1,590