Investment in Affiliates Accounted for Using the Equity Method -Summarized Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in affiliates accounted for using the Equity Method
Current assets	$ 459	$ 1,846
Property and equipment, net	1,031	1,099
Goodwill	762	746	$ 7
Other assets	210	151
Total assets	16,968	21,373
Current liabilities	582	612
Deferred income taxes	1,998	1,978
Long-term debt	3,761	4,816
Other liabilities	189	147
Equity	10,127	13,503
Total liabilities and equity	16,968	21,373
Operating costs and expenses (excluding depreciation and amortization)	282	20	9
Depreciation and amortization	267	15	2
Total operating costs and expenses	1,086	111	44
Operating income (loss)	(98)	(60)	(29)
Interest expense, net	(117)	(28)	(25)
Other income (expense), net	6	3	1
Income tax benefit (expense)	(218)	37	(38)
Net earnings (loss)	732	398	117
Net earnings (loss) attributable to Liberty Broadband shareholders	732	398	117
Charter.
Investments in affiliates accounted for using the Equity Method
Current assets	3,566	3,909
Property and equipment, net	34,310	34,357
Goodwill	29,562	29,554
Intangible assets, net	71,406	72,937
Other assets	3,647	3,449
Total assets	142,491	144,206
Current liabilities	12,458	9,875
Deferred income taxes	19,096	18,108
Long-term debt	88,564	81,744
Other liabilities	4,217	4,198
Equity	18,156	30,281
Total liabilities and equity	142,491	144,206
Revenue	51,682	48,097	45,764
Operating costs and expenses (excluding depreciation and amortization)	31,482	29,930	29,224
Depreciation and amortization	9,345	9,704	9,926
Other operating expenses, net	329	58	103
Total operating costs and expenses	41,156	39,692	39,253
Operating income (loss)	10,526	8,405	6,511
Interest expense, net	(4,037)	(3,848)	(3,797)
Other income (expense), net	(101)	(255)	(283)
Income tax benefit (expense)	(1,068)	(626)	(439)
Net earnings (loss)	5,320	3,676	1,992
Less: Net income attributable to noncontrolling interests	(666)	(454)	(324)
Net earnings (loss) attributable to Liberty Broadband shareholders	$ 4,654	$ 3,222	$ 1,668