DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets
Derivative receivables	$ 355,862	$ 387,374
Less: Netting agreements to assets	(277,223)	(308,431)
Less: Netting of cash collateral received	(25,575)	(21,226)
Total trading account derivatives, assets	53,064	57,717
Less: Cash collateral received	(558)	(563)
Less: Non-cash collateral received	(2,367)	(5,208)
Total net receivables	50,139	51,946
Liabilities
Derivative payables	352,939	385,211
Less: Netting agreements to liabilities	(277,223)	(308,431)
Less: Netting of cash collateral paid	(28,644)	(26,101)
Total derivative liabilities	47,072	50,679
Less: Cash collateral paid	(380)	(348)
Less: Non-cash collateral paid	(10,060)	(12,504)
Total net payables	36,632	37,827
Trading account assets
Liabilities
Does not meet applicable offsetting guidance, assets	4,000	4,000
Trading account assets | Over-the-counter
Liabilities
Less: Netting agreements to liabilities	(204,000)	(242,000)
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(40,000)	(44,000)
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(33,000)	(22,000)
Trading accounts liabilities
Liabilities
Does not meet applicable offsetting guidance, liabilities	9,000	10,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(204,000)	(242,000)
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(40,000)	(44,000)
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(33,000)	(22,000)
Derivative instruments designated as ASC 815 hedges
Assets
Derivative receivables	1,816	2,247
Liabilities
Derivative payables	603	1,858
Derivative instruments designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	561	557
Liabilities
Derivative payables	146	126
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	413	458
Liabilities
Derivative payables	109	5
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	148	99
Liabilities
Derivative payables	37	121
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	1,255	1,690
Liabilities
Derivative payables	457	1,732
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	1,255	1,690
Liabilities
Derivative payables	457	1,732
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	0	0
Liabilities
Derivative payables	0	0
Derivatives instruments not designated as ASC 815 hedges
Assets
Derivative receivables	354,046	385,127
Liabilities
Derivative payables	352,336	383,353
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	143,505	157,937
Liabilities
Derivative payables	135,641	153,060
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	103,659	113,993
Liabilities
Derivative payables	94,866	105,512
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	39,757	43,858
Liabilities
Derivative payables	40,710	47,462
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Exchange traded
Assets
Derivative receivables	89	86
Liabilities
Derivative payables	65	86
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	136,662	158,004
Liabilities
Derivative payables	129,133	155,469
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	136,114	157,633
Liabilities
Derivative payables	128,529	155,027
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	543	368
Liabilities
Derivative payables	603	420
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	5	3
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	1	22
Derivatives instruments not designated as ASC 815 hedges | Equity contracts
Assets
Derivative receivables	52,378	43,278
Liabilities
Derivative payables	64,444	47,946
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Over-the-counter
Assets
Derivative receivables	18,741	19,515
Liabilities
Derivative payables	31,341	25,425
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Cleared
Assets
Derivative receivables	2	0
Liabilities
Derivative payables	52	0
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Exchange traded
Assets
Derivative receivables	33,635	23,763
Liabilities
Derivative payables	33,051	22,521
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts
Assets
Derivative receivables	13,358	17,569
Liabilities
Derivative payables	15,388	18,796
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Over-the-counter
Assets
Derivative receivables	12,688	16,921
Liabilities
Derivative payables	14,518	18,086
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Exchange traded
Assets
Derivative receivables	670	648
Liabilities
Derivative payables	870	710
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives
Assets
Derivative receivables	8,143	8,339
Liabilities
Derivative payables	7,730	8,082
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Over-the-counter
Assets
Derivative receivables	6,371	6,094
Liabilities
Derivative payables	5,995	6,293
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Cleared
Assets
Derivative receivables	1,772	2,245
Liabilities
Derivative payables	$ 1,735	$ 1,789