INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest revenue
Loan interest, including fees	$ 15,041	$ 10,783	$ 42,381	$ 28,993
Deposits with banks	2,645	1,218	8,725	2,172
Securities borrowed and purchased under agreements to resell	7,363	2,176	18,791	3,375
Investments, including dividends	4,719	2,993	13,314	7,413
Trading account assets	3,893	1,989	10,391	4,794
Other interest-earning assets	1,176	760	3,277	1,953
Total interest revenue	34,837	19,919	96,879	48,700
Interest expense
Deposits	9,630	3,270	26,065	5,561
Securities loaned and sold under agreements to repurchase	6,090	1,251	14,609	2,188
Trading account liabilities	892	472	2,549	756
Short-term borrowings and other interest-bearing liabilities	1,956	745	5,382	1,068
Long-term debt	2,441	1,618	7,198	3,729
Total interest expense	21,009	7,356	55,803	13,302
Net interest income	13,828	12,563	41,076	35,398
Provision for credit losses on loans	1,816	1,328	5,314	2,972
Net interest income after provision for credit losses on loans	12,012	11,235	35,762	32,426
Consumer loans
Interest revenue
Loan interest, including fees	9,609	7,380	27,195	20,243
Corporate loans
Interest revenue
Loan interest, including fees	$ 5,432	$ 3,403	$ 15,186	$ 8,750