INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest revenue
Loan interest, including fees	$ 10,783	$ 8,874	$ 28,993	$ 26,516
Deposits with banks	1,218	147	2,172	418
Securities borrowed and purchased under agreements to resell	2,176	264	3,375	763
Investments, including dividends	2,993	1,885	7,413	5,455
Trading account assets	1,989	1,284	4,794	4,091
Other interest-earning assets	760	196	1,953	404
Total interest revenue	19,919	12,650	48,700	37,647
Interest expense
Deposits	3,270	730	5,561	2,118
Securities loaned and sold under agreements to repurchase	1,251	287	2,188	800
Trading account liabilities	472	106	756	370
Short-term borrowings and other interest-bearing liabilities(3)	745	8	1,068	70
Long-term debt	1,618	828	3,729	2,614
Total interest expense	7,356	1,959	13,302	5,972
Net interest income	12,563	10,691	35,398	31,675
Provision (benefit) for credit losses on loans	1,328	(188)	2,972	(2,793)
Net interest income after provision for credit losses on loans	11,235	10,879	32,426	34,468
Consumer
Interest revenue
Loan interest, including fees	7,380	6,567	20,243	19,790
Corporate
Interest revenue
Loan interest, including fees	$ 3,403	$ 2,307	$ 8,750	$ 6,726