Income Taxes (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Benefit (Expense) and Effective Tax Rate Reconciliation:
Federal income taxes	$ (6,000,000)	$ (23,000,000)	$ (4,000,000)
State income taxes	(113,000,000)	(47,000,000)	(25,000,000)
Current income tax expense	(119,000,000)	(70,000,000)	(29,000,000)
Federal income taxes	(358,000,000)	(204,000,000)	9,082,000,000
State income taxes	38,000,000	94,000,000	34,000,000
Deferred income tax benefit (expense)	(320,000,000)	(110,000,000)	9,116,000,000
Income tax benefit (expense)	$ (439,000,000)	$ (180,000,000)	$ 9,087,000,000
Federal income tax rate (percentage)	21.00%	21.00%	35.00%
Percentage of bonus depreciation of certain assets as a result of Tax Reform		100.00%
Income tax benefit realized as a result of Tax Reform			$ 9,300,000,000
Statutory federal income taxes	$ (510,000,000)	$ (354,000,000)	(360,000,000)
Statutory state income taxes, net	(57,000,000)	(54,000,000)	(34,000,000)
Change in uncertain tax positions	(64,000,000)	(24,000,000)	3,000,000
Nondeductible expenses	(24,000,000)	(25,000,000)	(21,000,000)
Net income attributable to noncontrolling interest	80,000,000	68,000,000	84,000,000
Excess stock compensation	63,000,000	34,000,000	88,000,000
Federal tax credits	46,000,000	77,000,000	21,000,000
Tax rate changes	15,000,000	107,000,000	9,293,000,000
Other	12,000,000	(9,000,000)	13,000,000
Components of Deferred Tax Assets (Liabilities):
Loss carryforwards	1,839,000,000	2,453,000,000
Accrued and other	664,000,000	578,000,000
Total gross deferred tax assets	2,503,000,000	3,031,000,000
Valuation Allowance:
Less: valuation allowance	(46,000,000)	(89,000,000)
Deferred tax assets	2,457,000,000	2,942,000,000
Investment in partnership	(20,159,000,000)	(20,319,000,000)
Accrued and other	(9,000,000)	(12,000,000)
Deferred tax liabilities	(20,168,000,000)	(20,331,000,000)
Net deferred tax liabilities	(17,711,000,000)	(17,389,000,000)
Net deferred tax liabilities related to certain indirect subsidiaries that file separate income tax returns	$ 55,000,000
Net deferred tax assets related to certain indirect subsidiaries that file separate income tax returns		3,000,000
Net Operating Loss Carryforwards:
Liberty Media Corporation’s beneficial interest in Legacy Charter (percentage)	27.00%
Federal tax loss carryforwards subject to 382 and other restrictions	$ 905,000,000
Net operating loss carryforwards for which the use is limited	$ 226,000,000
Tax Receivable Agreement:
A/N’s share of the tax benefit realized by Charter pursuant to the Tax Receivable Agreement (percentage)	50.00%
Minimum estimated obligation due to A/N under the Tax Receivable Agreement	$ 0
Maximum estimated obligation due to A/N under the Tax Receivable Agreement	3,000,000,000
Step-up in the tax basis of Charter Holdings’ assets resulting from the exchange of common units held by A/N for shares of Charter Class A common stock			487,000,000
Deferred tax asset resulting from the exchange of common units held by A/N for shares of Charter Class A common stock			85,000,000
Obligation due to A/N resulting from the exchange of common units held by A/N for shares of Charter Class A common stock	150,000,000	151,000,000
Benefit arising from remeasurement of a liability as a result of tax reform			101,000,000
Uncertain Tax Positions:
Unrecognized tax benefits that would impact the effective tax rate	242,000,000
Decrease in unrecognized tax benefits that is reasonably possible in 2017	31,000,000
Unrecognized tax benefits, beginning balance	180,000,000	164,000,000
Additions on prior year tax positions	15,000,000	7,000,000
Additions on current year tax positions	44,000,000	25,000,000
Reductions on settlements and expirations with taxing authorities	(9,000,000)	(16,000,000)
Unrecognized tax benefits, ending balance	230,000,000	180,000,000	$ 164,000,000
Interest and penalties accrued on uncertain income tax positions	56,000,000	45,000,000
Common Noncontrolling Interest
Tax Receivable Agreement:
Number of units exchanged			1.3
Amount of units exchanged			$ 400,000,000
Operating Loss Carryforwards | TWC Transaction
Valuation Allowance:
Less: valuation allowance	(9,000,000)	(39,000,000)
State Operating Loss Carryforwards and Other
Valuation Allowance:
Less: valuation allowance	(37,000,000)	$ (50,000,000)
Internal Revenue Service (IRS)
Net Operating Loss Carryforwards:
Net operating loss carryforwards	7,500,000,000
Deferred tax assets, operating loss carryforwards subject to expiration	1,600,000,000
State and Local Jurisdiction
Net Operating Loss Carryforwards:
Deferred tax assets, operating loss carryforwards subject to expiration	$ 257,000,000
Additional Paid-in Capital
Tax Receivable Agreement:
Obligation due to A/N resulting from the exchange of common units held by A/N for shares of Charter Class A common stock			$ 118,000,000