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	110					4		106
Other comprehensive income (loss)	112						112
Preferred stock dividend	(38)					(38)
Distributions to noncontrolling interests	(113)							(113)
Other equity transactions	3					1		2
Balance at Mar. 31, 2021	47,051	3,750	0	6,377	(658)	35,060	(1,440)	3,962
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	(20)					(129)		109
Other comprehensive income (loss)	(18)						(18)
Preferred stock dividend	(16)					(16)
Distributions to noncontrolling interests	(116)							(116)
Other equity transactions	5					(1)		6
Balance at Mar. 31, 2022	$ 50,424	$ 1,650	$ 0	$ 6,374	$ (744)	$ 40,608	$ (1,358)	$ 3,894