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Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 186	$ 114
Purchase of noncontrolling interest, net of tax	(353)	(429)
Change in noncontrolling interest ownership, net of tax	(61)	(44)
Common Noncontrolling Interest
Noncontrolling Interests:
Net income attributable to noncontrolling interest	$ 186	$ 76
Purchase of noncontrolling interest (shares)	657,268	792,654
Purchase price of noncontrolling interest	$ 416	$ 507
Common Noncontrolling Interest | A/N
Noncontrolling Interests:
Ownership percentage held by noncontrolling interest (percentage)	11.00%	7.00%
Preferred Noncontrolling Interest
Noncontrolling Interests:
Net income attributable to noncontrolling interest		$ 38
Noncontrolling Interests
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	$ (156)	(192)
Change in noncontrolling interest ownership, net of tax	(250)	(175)
Noncontrolling Interests | Common Noncontrolling Interest
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(156)	(192)
Change in noncontrolling interest ownership, net of tax	(250)	(175)
Additional Paid-in Capital
Noncontrolling Interests:
Purchase of noncontrolling interest, net of tax	(197)	(237)
Change in noncontrolling interest ownership, net of tax	189	131
Additional Paid-in Capital | Common Noncontrolling Interest
Noncontrolling Interests:
Impact of noncontrolling interest purchased	(197)	(237)
Change in noncontrolling interest ownership, net of tax	$ 189	$ 131
Maximum | Charter
Noncontrolling Interests:
Minority Interest Ownership Percentage Threshold	100.00%

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