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Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 190		$ 237		$ 352	$ 423
Purchase of noncontrolling interest (shares)					481,175	1,720,601
Purchase price of noncontrolling interest					$ 176	$ 994
Purchase of noncontrolling interest, net of tax	(50)	$ (108)	(494)	$ (353)
Change in noncontrolling interest ownership, net of tax	$ 1	(9)	$ (61)	(61)
A/N
Noncontrolling Interests:
Ownership percentage held by noncontrolling interest (percentage)	11.00%		11.00%		11.00%	11.00%
Common Noncontrolling Interest
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 189		$ 236		$ 351	$ 422
Purchase of noncontrolling interest (shares)	157,075		1,063,333
Purchase price of noncontrolling interest	$ 54		$ 578
Noncontrolling Interests
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(34)	(68)	(238)	(156)	(102)	(394)
Change in noncontrolling interest ownership, net of tax	7	(37)	(244)	(250)	(30)	(494)
Noncontrolling Interests | Common Noncontrolling Interest
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(34)		(238)
Change in noncontrolling interest ownership, net of tax	7		(244)
Additional Paid-in Capital
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(16)	(40)	(256)	(197)
Impact of noncontrolling interest purchased					(56)	(453)
Change in noncontrolling interest ownership, net of tax	(6)	$ 28	183	$ 189	$ 22	$ 372
Additional Paid-in Capital | Common Noncontrolling Interest
Noncontrolling Interests:
Impact of noncontrolling interest purchased	(16)		(256)
Change in noncontrolling interest ownership, net of tax	$ (6)		$ 183
Maximum | Charter
Noncontrolling Interests:
Minority Interest Ownership Percentage Threshold	100.00%				100.00%

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