INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest revenue
Loan interest, including fees	$ 13,283	$ 8,716
Deposits with banks	3,031	296
Securities borrowed and purchased under agreements to resell	5,174	394
Investments, including dividends	4,144	2,050
Trading account assets	2,747	1,146
Other interest-earning assets	1,016	549
Total interest revenue	29,395	13,151
Interest expense
Deposits	7,708	871
Securities loaned and sold under agreements to repurchase	3,566	282
Trading account liabilities	787	147
Short-term borrowings and other interest-bearing liabilities(3)	1,649	55
Long-term debt	2,337	925
Total interest expense	16,047	2,280
Net interest income	13,348	10,871
Provision for credit losses on loans	1,737	260
Net interest income after provision for credit losses on loans	11,611	10,611
Consumer
Interest revenue
Loan interest, including fees	8,624	6,262
Corporate
Interest revenue
Loan interest, including fees	$ 4,659	$ 2,454