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	3,131				3,134		(3)
OCI	(1,764)					(1,764)
Stock transactions:
Issued in connection with equity awards, net	(88)	$ 28		(114)	(2)
Issued in connection with equity awards, net (in shares)		5,597
Repurchase of common stock (in shares)		(19,788)
Repurchase of common stock	(1,116)	$ (99)		(1,017)
Redemption of preferred stock	(1,415)		(1,375)		(40)
Cash dividends declared on common stock	(1,207)				(1,207)
Cash dividends declared on preferred stock	(201)				(201)
Equity-based compensation expense	186			186
Other, net	(102)						(102)
Ending balance at Jun. 30, 2021	68,336	$ 6,674	6,673	34,898	21,139	(1,048)	0
Ending balance (in shares) at Jun. 30, 2021		1,334,770
Beginning balance at Mar. 31, 2021	67,876	$ 6,724	7,124	35,360	20,184	(1,516)	0
Beginning balance (in shares) at Mar. 31, 2021		1,344,845
Add (Deduct):
Net income	1,658				1,657		1
OCI	468					468
Stock transactions:
Issued in connection with equity awards, net	(4)	$ 1		(3)	(2)
Issued in connection with equity awards, net (in shares)		209
Repurchase of common stock (in shares)		(10,284)
Repurchase of common stock	(610)	$ (51)		(559)
Redemption of preferred stock	(465)		(451)		(14)
Cash dividends declared on common stock	(602)				(602)
Cash dividends declared on preferred stock	(84)				(84)
Equity-based compensation expense	100			100
Other, net	(1)						(1)
Ending balance at Jun. 30, 2021	68,336	$ 6,674	6,673	34,898	21,139	(1,048)	0
Ending balance (in shares) at Jun. 30, 2021		1,334,770
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	$ 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	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	1,326,393