Discontinued Operations - Major classes of line items constituting earnings (loss) from discontinued operations, net of tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other income (expense):
Net earnings (loss) from discontinuing operations	$ (409)	$ 22	$ (348)	$ 55
Spin-off | GCI Liberty, Inc.
Major classes of line items constituting earnings (loss) from discontinued operations, net of tax
Revenue	39	262	566	753
Operating costs and expenses:
Operating expense (exclusive of depreciation and amortization shown separately below)	10	64	126	188
Selling, general and administrative, including stock-based compensation	13	102	212	300
Impairment of intangible assets	534		534
Depreciation and amortization	9	55	114	157
Total operating costs and expenses	566	221	986	645
Operating income (loss)	(527)	41	(420)	108
Other income (expense):
Interest expense (including amortization of deferred loan fees)	(2)	(13)	(24)	(36)
Other, net	2	1	5	4
Earnings (loss) from discontinued operations before income taxes	(527)	29	(439)	76
Income tax benefit (expense)	118	(7)	91	(21)
Net earnings (loss) from discontinuing operations	$ (409)	$ 22	$ (348)	$ 55