Annual report [Section 13 and 15(d), not S-K Item 405]

Debt - Exchangeable Senior Debentures (Details)

v3.26.1
Debt - Exchangeable Senior Debentures (Details)
1 Months Ended 12 Months Ended
Apr. 01, 2020
Feb. 17, 2026
USD ($)
$ / item
Dec. 31, 2025
USD ($)
Feb. 15, 2026
USD ($)
Dec. 31, 2024
4% Exchangeable Senior Debentures due 2029          
Debt          
Debt instrument conversion ratio denominator     $ 1,000    
Interest rate (as a percent)     4.00%   4.00%
4% Exchangeable Senior Debentures due 2029 | Adjusted face amount per debenture          
Debt          
Debt instrument conversion ratio denominator     $ 899,000    
4% Exchangeable Senior Debentures due 2029 | Sprint Corporation | T Mobile Us Inc          
Debt          
Acquisition, conversion ratio of shares 0.10256        
4% Exchangeable Senior Debentures due 2029 | Sprint Corporation          
Debt          
Conversion ratio     3.2265    
4% Exchangeable Senior Debentures due 2029 | Lumen Technologies Inc          
Debt          
Conversion ratio 0.7860   0.7860    
4% Exchangeable Senior Debentures due 2029 | T Mobile Us Inc          
Debt          
Conversion ratio 0.3309        
3.75% Exchangeable Senior Debentures due 2030          
Debt          
Debt instrument conversion ratio denominator     $ 1,000    
Interest rate (as a percent)     3.75%   3.75%
3.75% Exchangeable Senior Debentures due 2030 | Subsequent Event          
Debt          
Debt instrument conversion ratio denominator   $ 1,000   $ 1,000  
Interest payment | $ / item   18.75      
Additional distribution | $ / item   0.4596      
3.75% Exchangeable Senior Debentures due 2030 | Adjusted face amount per debenture          
Debt          
Debt instrument conversion ratio denominator     $ 928    
3.75% Exchangeable Senior Debentures due 2030 | Adjusted face amount per debenture | Subsequent Event          
Debt          
Debt instrument conversion ratio denominator       $ 927  
3.75% Exchangeable Senior Debentures due 2030 | Sprint Corporation          
Debt          
Conversion ratio     2.3578    
3.75% Exchangeable Senior Debentures due 2030 | Lumen Technologies Inc          
Debt          
Conversion ratio 0.5746   0.5746    
3.75% Exchangeable Senior Debentures due 2030 | T Mobile Us Inc          
Debt          
Conversion ratio 0.2419