INTEREST INCOME AND EXPENSE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income
Loan interest, including fees	$ 62,104	$ 57,868	$ 41,242
Deposits with banks	11,417	11,238	4,515
Securities borrowed and purchased under agreements to resell	29,173	26,887	7,154
Investments, including dividends	18,662	18,300	11,214
Trading account assets	17,576	14,458	7,418
Other interest-bearing assets	4,781	4,507	2,865
Total interest income	143,713	133,258	74,408
Interest expense
Deposits	40,326	36,300	11,559
Securities loaned and sold under agreements to repurchase	27,884	21,439	4,455
Trading account liabilities	3,350	3,427	1,437
Short-term borrowings and other interest-bearing liabilities	7,703	7,438	2,488
Long-term debt	10,355	9,754	5,801
Interest expense	89,618	78,358	25,740
Net interest income	54,095	54,900	48,668
Provision for credit losses on loans	9,726	7,786	4,745
Net interest revenue after provision for loan losses	44,369	47,114	43,923
Consumer
Interest income
Loan interest, including fees	39,542	36,864	28,391
Corporate
Interest income
Loan interest, including fees	$ 22,562	$ 21,004	$ 12,851