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Basis of Presentation (Details) - USD ($) $ in Millions		12 Months Ended
Basis of Presentation (Details) - USD ($) $ in Millions	Jul. 14, 2025	Dec. 31, 2025	Dec. 31, 2024
Basis of Presentation
Distribution to former parent		$ 0	$ 150
State income taxes payable	$ 91
GCI Business
Basis of Presentation
Percentage of interest		100.00%
Non-voting preferred stock
Basis of Presentation
Number of shares issued	10,000
Affiliated Entity \| Liberty Broadband
Basis of Presentation
Federal income taxes payable cancelled	$ 206
Affiliated Entity \| Liberty Media
Basis of Presentation
Fee payable		$ 5
Amount reimbursable		$ 4