v3.25.3
Stock-Based Compensation - Outstanding Awards (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Number of RSU's      
Balance beginning 255,000 298,000  
Granted   96,000 160,000
Vested   (106,000)  
Cancelled   (33,000)  
Balance ending   255,000 298,000
Weighted average GDFV      
Weighted average GDFV at beginning $ 93.95 $ 105.81  
Granted   57.07 $ 86.62
Vested   91.32  
Cancelled   101.94  
Weighted average GDFV at ending   $ 93.95 $ 105.81
Fair value of vested RSU's   $ 9 $ 10
Share-based payment arrangement, option | Series B GCI Group common stock      
Weighted average GDFV      
Share-based payment award, options, outstanding, number 0