DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Assets
Derivative receivables	$ 387,278	$ 387,374
Less: Netting agreements to assets	(316,493)	(308,431)
Less: Netting of cash collateral received	(19,843)	(21,226)
Total trading account derivatives, assets	50,942	57,717
Less: Cash collateral received	(308)	(563)
Less: Non-cash collateral received	(5,655)	(5,208)
Total net receivables	44,979	51,946
Liabilities
Derivative payables	389,164	385,211
Less: Netting agreements to liabilities	(316,493)	(308,431)
Less: Netting of cash collateral paid	(25,082)	(26,101)
Total derivative liabilities	47,589	50,679
Less: Cash collateral paid	(28)	(348)
Less: Non-cash collateral paid	(3,464)	(12,504)
Total net payables	44,097	37,827
Netting agreements to assets	316,493	308,431
Netting agreements to liabilities	316,493	308,431
Trading account assets
Liabilities
Does not meet applicable offsetting guidance, assets	11,000	4,000
Trading account assets | Over-the-counter
Liabilities
Less: Netting agreements to liabilities	(234,000)	(242,000)
Netting agreements to liabilities	234,000	242,000
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(44,000)	(44,000)
Netting agreements to liabilities	44,000	44,000
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(38,000)	(22,000)
Netting agreements to liabilities	38,000	22,000
Trading accounts liabilities
Liabilities
Does not meet applicable offsetting guidance, liabilities	16,000	10,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(234,000)	(242,000)
Liabilities
Netting agreements to assets	234,000	242,000
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(44,000)	(44,000)
Liabilities
Netting agreements to assets	44,000	44,000
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(38,000)	(22,000)
Liabilities
Netting agreements to assets	38,000	22,000
Derivative instruments designated as ASC 815 hedges
Assets
Derivative receivables	1,972	2,247
Liabilities
Derivative payables	2,206	1,858
Derivative instruments designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	239	557
Liabilities
Derivative payables	729	126
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	183	458
Liabilities
Derivative payables	571	5
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	56	99
Liabilities
Derivative payables	158	121
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	1,733	1,690
Liabilities
Derivative payables	1,477	1,732
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	1,733	1,690
Liabilities
Derivative payables	1,477	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	385,306	385,127
Liabilities
Derivative payables	386,958	383,353
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	143,431	157,937
Liabilities
Derivative payables	134,276	153,060
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	100,207	113,993
Liabilities
Derivative payables	91,252	105,512
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	43,120	43,858
Liabilities
Derivative payables	42,974	47,462
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Exchange traded
Assets
Derivative receivables	104	86
Liabilities
Derivative payables	50	86
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	157,263	158,004
Liabilities
Derivative payables	153,627	155,469
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	156,115	157,633
Liabilities
Derivative payables	152,524	155,027
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	1,144	368
Liabilities
Derivative payables	1,103	420
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	4	3
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	0	22
Derivatives instruments not designated as ASC 815 hedges | Equity contracts
Assets
Derivative receivables	62,736	43,278
Liabilities
Derivative payables	74,547	47,946
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Over-the-counter
Assets
Derivative receivables	22,551	19,515
Liabilities
Derivative payables	34,739	25,425
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Cleared
Assets
Derivative receivables	0	0
Liabilities
Derivative payables	0	0
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Exchange traded
Assets
Derivative receivables	40,185	23,763
Liabilities
Derivative payables	39,808	22,521
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts
Assets
Derivative receivables	13,854	17,569
Liabilities
Derivative payables	16,294	18,796
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Over-the-counter
Assets
Derivative receivables	12,960	16,921
Liabilities
Derivative payables	15,407	18,086
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Exchange traded
Assets
Derivative receivables	894	648
Liabilities
Derivative payables	887	710
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives
Assets
Derivative receivables	8,022	8,339
Liabilities
Derivative payables	8,214	8,082
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Over-the-counter
Assets
Derivative receivables	6,001	6,094
Liabilities
Derivative payables	6,341	6,293
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Cleared
Assets
Derivative receivables	2,021	2,245
Liabilities
Derivative payables	$ 1,873	$ 1,789