Discontinued Operations (Details) $ in Millions	Jul. 14, 2025	Sep. 30, 2025 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Due to GCI Liberty		$ 98
GCI Liberty, Inc. | Spin-off
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Due to GCI Liberty		$ 98
GCI Liberty, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Spin-Off Distribution Ratio	0.2
Percentage of outstanding equity of GCI, LLC after spin-off	100.00%