Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Preferred Stock	Additional Paid-In Capital	Retained Earnings	AOCI	Noncontrolling Interests
Beginning balance at Dec. 31, 2021	$ 69,271	$ 6,639	$ 6,673	$ 34,565	$ 22,998	$ (1,604)
Beginning balance (in shares) at Dec. 31, 2021		1,327,818
Add (Deduct):
Net income	1,416				1,415		$ 1
OCI	(4,931)					(4,931)
Stock transactions:
Issued in connection with equity awards, net	(89)	$ 18		(106)	(1)
Issued in connection with equity awards, net (in shares)		3,596
Cash dividends declared on common stock	(637)				(637)
Cash dividends declared on preferred stock	(88)				(88)
Equity-based compensation expense	80			80
Other, net	22						22
Ending balance at Mar. 31, 2022	65,044	$ 6,657	6,673	34,539	23,687	(6,535)	23
Ending balance (in shares) at Mar. 31, 2022		1,331,414
Beginning balance at Dec. 31, 2022	$ 60,537	$ 6,634	6,673	34,544	26,264	(13,601)	23
Beginning balance (in shares) at Dec. 31, 2022	1,326,829	1,326,829
Add (Deduct):
Net income	$ 1,515				1,513		2
OCI	1,020					1,020
Stock transactions:
Issued in connection with equity awards, net	(20)	$ 26		(45)	(1)
Issued in connection with equity awards, net (in shares)		5,089
Cash dividends declared on common stock	(691)				(691)
Cash dividends declared on preferred stock	(103)				(103)
Equity-based compensation expense	83			83
Other, net	53				56		(3)
Ending balance at Mar. 31, 2023	$ 62,394	$ 6,660	$ 6,673	$ 34,582	$ 27,038	$ (12,581)	$ 22
Ending balance (in shares) at Mar. 31, 2023	1,331,918	1,331,918