Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 237		$ 138		$ 423	$ 252
Purchase of noncontrolling interest, net of tax	(494)	$ (353)	(492)	$ (429)
Change in noncontrolling interest ownership, net of tax	(61)	(61)	(330)	(44)
Common Noncontrolling Interest
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 236		$ 105		$ 422	$ 181
Purchase of noncontrolling interest (shares)	1,063,333		912,034		1,720,601	1,704,688
Purchase price of noncontrolling interest	$ 578		$ 583		$ 994	$ 1,090
Common Noncontrolling Interest | A/N
Noncontrolling Interests:
Ownership percentage held by noncontrolling interest (percentage)	11.00%		7.00%		11.00%	7.00%
Preferred Noncontrolling Interest
Noncontrolling Interests:
Net income attributable to noncontrolling interest			$ 32			$ 70
Noncontrolling Interests
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	$ (238)	(156)	(213)	(192)
Change in noncontrolling interest ownership, net of tax	(244)	(250)	(1,333)	(175)
Noncontrolling Interests | Common Noncontrolling Interest
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(238)		(213)		$ (394)	(405)
Change in noncontrolling interest ownership, net of tax	(244)		(1,333)		(494)	(1,508)
Additional Paid-in Capital
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(256)	(197)	(279)	(237)
Change in noncontrolling interest ownership, net of tax	183	$ 189	1,003	$ 131
Additional Paid-in Capital | Common Noncontrolling Interest
Noncontrolling Interests:
Impact of noncontrolling interest purchased	(256)		(279)		(453)	(516)
Change in noncontrolling interest ownership, net of tax	$ 183		$ 1,003		$ 372	$ 1,134
Maximum | Charter
Noncontrolling Interests:
Minority Interest Ownership Percentage Threshold	100.00%				100.00%