INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest revenue
Loan interest, including fees	$ 41,242	$ 35,440	$ 40,185
Deposits with banks	4,515	577	928
Securities borrowed and purchased under agreements to resell	7,154	1,052	2,283
Investments, including dividends	11,214	7,388	7,989
Trading account assets	7,418	5,365	6,125
Other interest-bearing assets	2,865	653	579
Total interest revenue	74,408	50,475	58,089
Interest expense
Deposits	11,559	2,896	5,334
Securities loaned and sold under agreements to repurchase	4,455	1,012	2,077
Trading account liabilities	1,437	482	628
Short-term borrowings and other interest-bearing liabilities	2,488	121	630
Long-term debt	5,801	3,470	4,669
Total interest expense	25,740	7,981	13,338
Net interest income	48,668	42,494	44,751
Provision for credit losses on loans	4,745	(3,103)	15,922
Net interest revenue after provision for loan losses	43,923	45,597	28,829
Consumer
Interest revenue
Loan interest, including fees	28,391	26,408	27,763
Corporate
Interest revenue
Loan interest, including fees	$ 12,851	$ 9,032	$ 12,422