CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total Charter Shareholders’ Equity	Noncontrolling Interests
Balance at Dec. 31, 2019	$ 38,811	$ 0	$ 0	$ 31,405	$ 40	$ 0	$ 31,445	$ 7,366
Rollforward of Consolidated Shareholders' Equity:
Consolidated net income	467	0	0	0	396	0	396	71
Stock compensation expense	90	0	0	90	0	0	90	0
Exercise of stock options	93	0	0	93	0	0	93	0
Issuance of equity	23	0	0	23	0	0	23	0
Purchases of treasury stock	(2,352)	0	0	0	0	(2,352)	(2,352)	0
Purchase of noncontrolling interest, net of tax	(344)	0	0	(149)	0	0	(149)	(195)
Change in noncontrolling interest ownership, net of tax	(27)	0	0	82	0	0	82	(109)
Distributions to noncontrolling interest	(39)	0	0	0	0	0	0	(39)
Balance at Mar. 31, 2020	36,722	0	0	31,544	436	(2,352)	29,628	7,094
Balance at Dec. 31, 2020	30,281	0	0	29,000	(5,195)	0	23,805	6,476
Rollforward of Consolidated Shareholders' Equity:
Consolidated net income	921	0	0	0	807	0	807	114
Stock compensation expense	134	0	0	134	0	0	134	0
Exercise of stock options	9	0	0	9	0	0	9	0
Purchases of treasury stock	(3,652)	0	0	0	0	(3,652)	(3,652)	0
Purchase of noncontrolling interest, net of tax	(429)	0	0	(237)	0	0	(237)	(192)
Change in noncontrolling interest ownership, net of tax	(44)	0	0	131	0	0	131	(175)
Distributions to noncontrolling interest	(39)	0	0	0	0	0	0	(39)
Balance at Mar. 31, 2021	$ 27,181	$ 0	$ 0	$ 29,037	$ (4,388)	$ (3,652)	$ 20,997	$ 6,184