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	2,948				2,946		$ 2
OCI	(7,636)					(7,636)
Stock transactions:
Issued in connection with equity awards, net	(91)	$ 19		(107)	(3)
Issued in connection with equity awards, net (in shares)		3,683
Repurchase of common stock (in shares)		(5,108)
Repurchase of common stock	(250)	$ (26)		(224)
Cash dividends declared on common stock	(1,276)				(1,276)
Cash dividends declared on preferred stock	(165)				(165)
Equity-based compensation expense	176			176
Other, net	22						22
Ending balance at Jun. 30, 2022	62,999	$ 6,632	6,673	34,410	24,500	(9,240)	24
Ending balance (in shares) at Jun. 30, 2022		1,326,393
Beginning balance at Mar. 31, 2022	65,044	$ 6,657	6,673	34,539	23,687	(6,535)	23
Beginning balance (in shares) at Mar. 31, 2022		1,331,414
Add (Deduct):
Net income	1,532				1,531		1
OCI	(2,705)					(2,705)
Stock transactions:
Issued in connection with equity awards, net	(2)	$ 1		(1)	(2)
Issued in connection with equity awards, net (in shares)		87
Repurchase of common stock (in shares)		(5,108)
Repurchase of common stock	(250)	$ (26)		(224)
Cash dividends declared on common stock	(639)				(639)
Cash dividends declared on preferred stock	(77)				(77)
Equity-based compensation expense	96			96
Ending balance at Jun. 30, 2022	62,999	$ 6,632	6,673	34,410	24,500	(9,240)	24
Ending balance (in shares) at Jun. 30, 2022		1,326,393
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	$ 2,860				2,822		38
OCI	227					227
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	1,413			1,317			96
Stock transactions:
Issued in connection with equity awards, net	(21)	$ 26		(44)	(3)
Issued in connection with equity awards, net (in shares)		5,147
Cash dividends declared on common stock	(1,384)				(1,384)
Cash dividends declared on preferred stock	(178)				(178)
Equity-based compensation expense	173			173
Other, net	54				56		(2)
Ending balance at Jun. 30, 2023	$ 63,681	$ 6,660	6,673	35,990	27,577	(13,374)	155
Ending balance (in shares) at Jun. 30, 2023	1,331,976	1,331,976
Beginning balance at Mar. 31, 2023	$ 62,394	$ 6,660	6,673	34,582	27,038	(12,581)	22
Beginning balance (in shares) at Mar. 31, 2023		1,331,918
Add (Deduct):
Net income	1,345				1,309		36
OCI	(793)					(793)
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	1,413			1,317			96
Stock transactions:
Issued in connection with equity awards, net	(1)	$ 0		1	(2)
Issued in connection with equity awards, net (in shares)		58
Cash dividends declared on common stock	(693)				(693)
Cash dividends declared on preferred stock	(75)				(75)
Equity-based compensation expense	90			90
Other, net	1						1
Ending balance at Jun. 30, 2023	$ 63,681	$ 6,660	$ 6,673	$ 35,990	$ 27,577	$ (13,374)	$ 155
Ending balance (in shares) at Jun. 30, 2023	1,331,976	1,331,976