v3.26.1
Stock-Based Compensation - Number and weighted average GDFV of RSUs granted to employees (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Weighted average GDFV    
Total unrecognized compensation cost $ 28  
Weighted average period for recognition 1 year 9 months 18 days  
RSUs | Series C GCI Group common stock    
Number of RSU's    
Balance beginning 795,000  
Granted 208,000  
Vested (154,000)  
Cancelled (3,000)  
Balance ending 846,000  
Weighted average GDFV    
Weighted average GDFV at beginning $ 30.97  
Granted 36.97  
Vested 36.89  
Cancelled 31.74  
Weighted average GDFV at ending $ 31.36  
Employee Stock Option | Series A GCI Group common stock    
Weighted average GDFV    
Share-based payment award, options, outstanding, number 0  
Employee Stock Option | Series B GCI Group common stock    
Weighted average GDFV    
Share-based payment award, options, outstanding, number 0  
Employee Stock Option | Series C GCI Group common stock    
Weighted average GDFV    
Share-based payment award, options, outstanding, number 1,049,000 1,049,000
GCI Liberty reserved shares 1,000,000