Noncontrolling Interests (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 324	$ 276	$ 220
Distributions to noncontrolling interest	154	153	153
Decrease in noncontrolling interest based on carrying value	(805)	(622)	(1,482)
Change in noncontrolling interest ownership, net of tax	(56)	(18)	(139)
Increase (decrease) in equity from equity exchanges			(33)
Noncontrolling Interests
Noncontrolling Interests:
Distributions to noncontrolling interest	154	153	153
Decrease in noncontrolling interest based on carrying value	(565)	(518)	(1,187)
Change in noncontrolling interest ownership, net of tax	(226)	(72)	(362)
Increase (decrease) in equity from equity exchanges			(298)
Additional Paid-in Capital
Noncontrolling Interests:
Distributions to noncontrolling interest	0	0	0
Decrease in noncontrolling interest based on carrying value	(240)	(104)	(295)
Change in noncontrolling interest ownership, net of tax	$ 170	$ 54	223
Increase (decrease) in equity from equity exchanges			$ 265
Common Noncontrolling Interest
Noncontrolling Interests:
Shares held by noncontrolling shareholders (shares)	17,900,000
Ownership percentage held by noncontrolling interest (percentage)	8.00%	8.00%	9.00%
Net income attributable to noncontrolling interest	$ 173	$ 125	$ 69
Distributions to noncontrolling interest	$ 2	$ 3	$ 3
Number of units purchased	2,276,906	2,125,190	4,798,367
Average price per unit	$ 388.72	$ 308.90	$ 347.03
Amount of units purchased	$ 885	$ 656	$ 1,665
Number of units exchanged			1,300,000
Amount of units exchanged			$ 400
Common Noncontrolling Interest \| Noncontrolling Interests
Noncontrolling Interests:
Decrease in noncontrolling interest based on carrying value	(565)	(518)	(1,187)
Common Noncontrolling Interest \| Additional Paid-in Capital
Noncontrolling Interests:
Decrease in additional paid-in-capital, net of tax	$ (240)	(104)	(295)
Preferred Noncontrolling Interest
Noncontrolling Interests:
Shares held by noncontrolling shareholders (shares)	25,000,000
Distributions to noncontrolling interest	$ 150	$ 150	$ 150
Convertible units, face amount	$ 2,500
Convertible units, dividend rate (percentage)	6.00%
Number of units to be received upon conversion to Charter Holdings common units (in units)	0.37334
Number of shares to be received upon conversion to Charter Class A common stock (in shares)	0.37334
Convertible units, conversion price (dollars per unit)	$ 267.85
Convertible units, conversion price threshold (percentage)	130.00%
Convertible units, conversion price threshold (dollars per unit)	$ 348.205
Maximum
Noncontrolling Interests:
Noncontrolling interest ownership threshold (percentage)	100.00%
Class A Common Stock
Noncontrolling Interests:
Number of units exchanged			1,263,497

The price per unit of the conversion feature as defined in the Limited Liability Company Agreement of Charter Holdings.

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