Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Long-term Income Tax Receivable	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net	Noncontrolling Interest
Balance at Dec. 31, 2020	$ 46,977	$ 3,750	$ 0	$ 6,377	$ (658)	$ 35,093	$ (1,552)	$ 3,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,493					2,285		208
Other comprehensive income (loss)	196						192	4
Preferred stock dividend	(75)					(75)
Distributions to noncontrolling interests	(234)							(234)
Contributions	9							9
Other equity transactions	(1)							(1)
Balance at Jun. 30, 2021	49,365	3,750	0	6,377	(658)	37,303	(1,360)	3,953
Balance at Mar. 31, 2021	47,051	3,750	0	6,377	(658)	35,060	(1,440)	3,962
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,383					2,281		102
Other comprehensive income (loss)	84						80	4
Preferred stock dividend	(37)					(37)
Distributions to noncontrolling interests	(121)							(121)
Contributions	9							9
Other equity transactions	(4)					(1)		(3)
Balance at Jun. 30, 2021	49,365	3,750	0	6,377	(658)	37,303	(1,360)	3,953
Balance at Dec. 31, 2021	50,589	1,650	0	6,374	(744)	40,754	(1,340)	3,895
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,997					2,768		229
Other comprehensive income (loss)	(448)						(448)
Preferred stock redemptions	(800)	(800)
Preferred stock dividend	(29)					(29)
Common stock purchases	(870)			(77)		(793)
Distributions to noncontrolling interests	(245)							(245)
Contributions	2							2
Other equity transactions	(5)			1		(12)		6
Balance at Jun. 30, 2022	51,191	850	0	6,298	(744)	42,688	(1,788)	3,887
Balance at Mar. 31, 2022	50,424	1,650	0	6,374	(744)	40,608	(1,358)	3,894
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	3,017					2,897		120
Other comprehensive income (loss)	(430)						(430)
Preferred stock redemptions	(800)	(800)
Preferred stock dividend	(13)					(13)
Common stock purchases	(870)			(77)		(793)
Distributions to noncontrolling interests	(129)							(129)
Contributions	2							2
Other equity transactions	(10)			1		(11)
Balance at Jun. 30, 2022	$ 51,191	$ 850	$ 0	$ 6,298	$ (744)	$ 42,688	$ (1,788)	$ 3,887