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, 2020	$ 70,912	$ 6,745	$ 8,048	$ 35,843	$ 19,455	$ 716	$ 105
Beginning balance (in shares) at Dec. 31, 2020		1,348,961
Add (Deduct):
Net income	1,473				1,477		(4)
OCI	(2,232)					(2,232)
Stock transactions:
Issued in connection with equity awards, net	(84)	$ 27		(111)
Issued in connection with equity awards, net (in shares)		5,388
Repurchase of common stock (in shares)		(9,504)
Repurchase of common stock	(506)	$ (48)		(458)
Redemption of preferred stock	(950)		(924)		(26)
Cash dividends declared on common stock	(605)				(605)
Cash dividends declared on preferred stock	(117)				(117)
Equity-based compensation expense	86			86
Other, net	(101)						(101)
Ending balance at Mar. 31, 2021	67,876	$ 6,724	7,124	35,360	20,184	(1,516)	0
Ending balance (in shares) at Mar. 31, 2021		1,344,845
Beginning balance at Dec. 31, 2021	$ 69,271	$ 6,639	6,673	34,565	22,998	(1,604)	0
Beginning balance (in shares) at Dec. 31, 2021	1,327,818	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	1,331,414