DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets
Derivative receivables	$ 362,956	$ 387,374
Less: Netting agreements to assets	(285,867)	(308,431)
Less: Netting of cash collateral received	(23,492)	(21,226)
Total trading account derivatives, assets	53,597	57,717
Less: Cash collateral received	(430)	(563)
Less: Non-cash collateral received	(2,762)	(5,208)
Total net receivables	50,405	51,946
Liabilities
Derivative payables	360,093	385,211
Less: Netting agreements to liabilities	(285,867)	(308,431)
Less: Netting of cash collateral paid	(27,720)	(26,101)
Total derivative liabilities	46,506	50,679
Less: Cash collateral paid	(648)	(348)
Less: Non-cash collateral paid	(10,279)	(12,504)
Total net payables	35,579	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	(208,000)	(242,000)
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(43,000)	(44,000)
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(35,000)	(22,000)
Trading accounts liabilities
Liabilities
Does not meet applicable offsetting guidance, liabilities	10,000	10,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(208,000)	(242,000)
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(43,000)	(44,000)
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(35,000)	(22,000)
Derivative instruments designated as ASC 815 hedges
Assets
Derivative receivables	1,978	2,247
Liabilities
Derivative payables	1,054	1,858
Derivative instruments designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	658	557
Liabilities
Derivative payables	56	126
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	499	458
Liabilities
Derivative payables	3	5
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	159	99
Liabilities
Derivative payables	53	121
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	1,320	1,690
Liabilities
Derivative payables	998	1,732
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	1,320	1,690
Liabilities
Derivative payables	998	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	360,978	385,127
Liabilities
Derivative payables	359,039	383,353
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	147,679	157,937
Liabilities
Derivative payables	141,152	153,060
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	105,553	113,993
Liabilities
Derivative payables	97,690	105,512
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	42,046	43,858
Liabilities
Derivative payables	43,419	47,462
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Exchange traded
Assets
Derivative receivables	80	86
Liabilities
Derivative payables	43	86
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	131,829	158,004
Liabilities
Derivative payables	123,349	155,469
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	131,348	157,633
Liabilities
Derivative payables	122,844	155,027
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	480	368
Liabilities
Derivative payables	491	420
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	1	3
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	14	22
Derivatives instruments not designated as ASC 815 hedges | Equity contracts
Assets
Derivative receivables	56,602	43,278
Liabilities
Derivative payables	68,408	47,946
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Over-the-counter
Assets
Derivative receivables	21,211	19,515
Liabilities
Derivative payables	32,826	25,425
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Cleared
Assets
Derivative receivables	2	0
Liabilities
Derivative payables	3	0
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Exchange traded
Assets
Derivative receivables	35,389	23,763
Liabilities
Derivative payables	35,579	22,521
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts
Assets
Derivative receivables	16,076	17,569
Liabilities
Derivative payables	17,558	18,796
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Over-the-counter
Assets
Derivative receivables	15,377	16,921
Liabilities
Derivative payables	16,727	18,086
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Exchange traded
Assets
Derivative receivables	699	648
Liabilities
Derivative payables	831	710
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives
Assets
Derivative receivables	8,792	8,339
Liabilities
Derivative payables	8,572	8,082
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Over-the-counter
Assets
Derivative receivables	6,133	6,094
Liabilities
Derivative payables	6,274	6,293
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Cleared
Assets
Derivative receivables	2,659	2,245
Liabilities
Derivative payables	$ 2,298	$ 1,789