v3.25.3
Document and Entity Information
9 Months Ended
Sep. 30, 2025
Document and Entity Information [Abstract]  
Document Type S-1
Entity Registrant Name GCI Liberty, Inc.
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company true
Entity Ex Transition Period true
Entity Central Index Key 0002057463
Amendment Flag false