INTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest revenue
Loan interest, including fees	$ 14,056	$ 9,495	$ 27,339	$ 18,211
Deposits with banks	3,049	658	6,080	954
Securities borrowed and purchased under agreements to resell	6,254	805	11,428	1,199
Investments, including dividends	4,451	2,370	8,595	4,420
Trading account assets	3,752	1,659	6,499	2,805
Other interest-earning assets	1,085	643	2,101	1,192
Total interest revenue	32,647	15,630	62,042	28,781
Interest expense
Deposits	8,727	1,420	16,435	2,291
Securities loaned and sold under agreements to repurchase	4,953	655	8,519	937
Trading account liabilities	870	137	1,657	284
Short-term borrowings and other interest-bearing liabilities(3)	1,777	268	3,426	323
Long-term debt	2,420	1,186	4,757	2,111
Total interest expense	18,747	3,666	34,794	5,946
Net interest income	13,900	11,964	27,248	22,835
Provision for credit losses on loans	1,761	1,384	3,498	1,644
Net interest income after provision for credit losses on loans	12,139	10,580	23,750	21,191
Consumer
Interest revenue
Loan interest, including fees	8,962	6,601	17,586	12,863
Corporate
Interest revenue
Loan interest, including fees	$ 5,094	$ 2,894	$ 9,753	$ 5,348