PLEDGED ASSETS, RESTRICTED CASH, COLLATERAL, GUARANTEES AND COMMITMENTS - Credit Commitments and Lines of Credit (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Credit Commitments
Credit commitments	$ 1,015,564	$ 1,062,781
Unsettled reverse repurchase and securities borrowing agreements	111,600	126,600
Unsettled repurchase and securities lending agreements	37,300	41,100
Commercial and similar letters of credit
Credit Commitments
Credit commitments	5,316	5,910
One-to four-family residential mortgages
Credit Commitments
Credit commitments	2,394	4,351
Revolving open-end loans secured by one-to four-family residential properties
Credit Commitments
Credit commitments	6,380	7,913
Commercial real estate, construction and land development
Credit Commitments
Credit commitments	15,170	17,843
Credit card lines
Credit Commitments
Credit commitments	683,232	700,559
Commercial and other consumer loan commitments
Credit Commitments
Credit commitments	297,399	320,556
Other commitments and contingencies
Credit Commitments
Credit commitments	5,673	$ 5,649
U.S.
Credit Commitments
Credit commitments	821,312
U.S. | Commercial and similar letters of credit
Credit Commitments
Credit commitments	650
U.S. | One-to four-family residential mortgages
Credit Commitments
Credit commitments	906
U.S. | Revolving open-end loans secured by one-to four-family residential properties
Credit Commitments
Credit commitments	5,719
U.S. | Commercial real estate, construction and land development
Credit Commitments
Credit commitments	13,275
U.S. | Credit card lines
Credit Commitments
Credit commitments	603,975
U.S. | Commercial and other consumer loan commitments
Credit Commitments
Credit commitments	191,318
U.S. | Other commitments and contingencies
Credit Commitments
Credit commitments	5,469
Outside U.S.
Credit Commitments
Credit commitments	194,252
Outside U.S. | Commercial and similar letters of credit
Credit Commitments
Credit commitments	4,666
Outside U.S. | One-to four-family residential mortgages
Credit Commitments
Credit commitments	1,488
Outside U.S. | Revolving open-end loans secured by one-to four-family residential properties
Credit Commitments
Credit commitments	661
Outside U.S. | Commercial real estate, construction and land development
Credit Commitments
Credit commitments	1,895
Outside U.S. | Credit card lines
Credit Commitments
Credit commitments	79,257
Outside U.S. | Commercial and other consumer loan commitments
Credit Commitments
Credit commitments	106,081
Outside U.S. | Other commitments and contingencies
Credit Commitments
Credit commitments	$ 204