Consolidated Statements of Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Preferred Stock	Common Stock	Retained Earnings	AOCI	Total Shareholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2020	$ 26,461	$ 2,387	$ 21,258	$ 4,189	$ (1,717)	$ 26,117	$ 344
Beginning balance (in shares) at Dec. 31, 2020		2	806
Net income including noncontrolling interests	1,008			1,008		1,008
Issuance of stock	48		$ 48			48
Stock awards (net of change in unearned compensation)	4		4			4
Preferred stock dividends (see Note 16)	(16)			(16)		(16)
Common stock dividends and distributions	(514)			(508)		(508)	(6)
Other comprehensive income, net of tax	46				46	46
Other	1						1
Ending balance at Mar. 31, 2021	27,038	$ 2,387	$ 21,310	4,673	(1,671)	26,699	$ 339
Ending balance (in shares) at Mar. 31, 2021		2	806
Beginning balance at Dec. 31, 2021	27,308	$ 1,783	$ 21,610	5,373	(1,458)	27,308
Beginning balance (in shares) at Dec. 31, 2021		2	810
Net income including noncontrolling interests	711			711		711
Issuance of stock	45		$ 45			45
Issuance of stock (in shares)			1
Stock awards (net of change in unearned compensation)	2		$ 2			2
Preferred stock dividends (see Note 16)	(27)			(27)		(27)
Common stock dividends and distributions	(541)			(541)		(541)
Other comprehensive income, net of tax	22				22	22
Ending balance at Mar. 31, 2022	$ 27,520	$ 1,783	$ 21,657	$ 5,516	$ (1,436)	$ 27,520
Ending balance (in shares) at Mar. 31, 2022		2	811