CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions		Total	Preferred stock, Series H		Preferred stock Series I		Preferred stock, Series J		Preferred Stock Series K		Preferred stock, Series L	Class B Preferred stock, Series A		Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Capital Surplus	Capital Surplus Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Preferred stock, Series H		Retained Earnings Preferred stock Series I		Retained Earnings Preferred stock, Series J		Retained Earnings Preferred Stock Series K		Retained Earnings Preferred stock, Series L	Retained Earnings Class B Preferred stock, Series A		Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance at Dec. 31, 2019		$ 21,203												$ (472)	$ 20,731	$ 2,051	$ 2,051	$ 1,770	$ 1,770	$ 3,599	$ 3,599	$ 18,315												$ (472)	$ 17,843	$ 1,192	$ 1,192	$ (5,724)	$ (5,724)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		1,427																				1,427
Other comprehensive (loss) income, net of tax		1,409																																		1,409
Cash dividends declared:
Common stock		(780)																				(780)
Preferred stock			$ (31)	[1]	$ (30)	[1]	$ (12)	[1]	$ (12)	[1]	$ (7)	$ (12)	[1]										$ (31)	[1]	$ (30)	[1]	$ (12)	[1]	$ (12)	[1]	$ (7)	$ (12)	[1]
Issuance of preferred stock		346																346
Impact of stock transactions under stock compensation plans, net		82																		36																		46
Other		0																				(2)																2
Ending balance at Dec. 31, 2020		23,111														2,051		2,116		3,635		18,384														2,601		(5,676)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		2,770																				2,770
Other comprehensive (loss) income, net of tax		(1,394)																																		(1,394)
Cash dividends declared:
Common stock		(805)																				(805)
Preferred stock	[1]		(31)		(30)		(10)		(12)		(16)	(12)											(31)		(30)		(10)		(12)		(16)	(12)
Shares acquired for treasury		(1,393)																																				(1,393)
Impact of stock transactions under stock compensation plans, net		33																		(11)																		44
Other		(1)																				(2)																1
Ending balance at Dec. 31, 2021		22,210														2,051		2,116		3,624		20,236														1,207		(7,024)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		2,446																				2,446
Other comprehensive (loss) income, net of tax		(6,317)																																		(6,317)
Cash dividends declared:
Common stock		(877)																				$ (877)
Preferred stock	[1]		$ (31)		$ (30)		$ (15)		$ (12)		$ (16)	$ (12)											$ (31)		$ (30)		$ (15)		$ (12)		$ (16)	$ (12)
Shares acquired for treasury		(100)																																				(100)
Impact of stock transactions under stock compensation plans, net		81																		60																		21
Other																																						0
Ending balance at Dec. 31, 2022		$ 17,327													$ 17,327	$ 2,051		$ 2,116		$ 3,684															$ 21,689	$ (5,110)		$ (7,103)

[1] Refer to Note 24 for further information on dividends declared for preferred stock.