DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Assets
Derivative receivables	$ 425,417	$ 444,987
Less: Netting agreements to assets	(333,991)	(346,545)
Less: Netting of cash collateral received	(22,872)	(23,136)
Total trading account derivatives, assets	68,554	75,306
Less: Cash collateral received	(818)	(1,455)
Less: Non-cash collateral received	(2,933)	(5,923)
Total net receivables	64,803	67,928
Liabilities
Derivative payables	415,046	436,493
Less: Netting agreements to liabilities	(333,991)	(346,545)
Less: Netting of cash collateral paid	(26,294)	(30,032)
Total derivative liabilities	54,761	59,916
Less: Cash collateral paid	(254)	(2,272)
Less: Non-cash collateral paid	(10,741)	(13,475)
Total net payables	43,766	44,169
Trading account assets
Liabilities
Does not meet applicable offsetting guidance, assets	4,000	14,000
Trading account assets | Over-the-counter
Liabilities
Less: Netting agreements to liabilities	(255,000)	(276,000)
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(56,000)	(49,000)
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(23,000)	(22,000)
Trading accounts liabilities
Liabilities
Does not meet applicable offsetting guidance, liabilities	9,000	11,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(255,000)	(276,000)
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(56,000)	(49,000)
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(23,000)	(22,000)
Derivative instruments designated as ASC 815 hedges
Assets
Derivative receivables	2,328	2,888
Liabilities
Derivative payables	1,776	1,871
Derivative instruments designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	773	597
Liabilities
Derivative payables	29	102
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	351	468
Liabilities
Derivative payables	7	1
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	422	129
Liabilities
Derivative payables	22	101
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	1,555	2,291
Liabilities
Derivative payables	1,747	1,769
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	1,553	2,288
Liabilities
Derivative payables	1,747	1,766
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	2	3
Liabilities
Derivative payables	0	3
Derivatives instruments not designated as ASC 815 hedges
Assets
Derivative receivables	423,089	442,099
Liabilities
Derivative payables	413,270	434,622
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts
Assets
Derivative receivables	178,345	177,607
Liabilities
Derivative payables	173,230	172,518
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Over-the-counter
Assets
Derivative receivables	124,279	126,844
Liabilities
Derivative payables	119,409	119,854
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Cleared
Assets
Derivative receivables	53,859	50,515
Liabilities
Derivative payables	53,634	52,566
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Exchange traded
Assets
Derivative receivables	207	248
Liabilities
Derivative payables	187	98
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts
Assets
Derivative receivables	172,762	185,372
Liabilities
Derivative payables	165,204	184,226
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Over-the-counter
Assets
Derivative receivables	172,079	184,869
Liabilities
Derivative payables	164,527	183,578
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Cleared
Assets
Derivative receivables	679	502
Liabilities
Derivative payables	659	643
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	4	1
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	18	5
Derivatives instruments not designated as ASC 815 hedges | Equity contracts
Assets
Derivative receivables	43,053	42,407
Liabilities
Derivative payables	46,499	43,783
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Over-the-counter
Assets
Derivative receivables	19,000	19,674
Liabilities
Derivative payables	22,006	21,871
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Cleared
Assets
Derivative receivables	19	1
Liabilities
Derivative payables	120	4
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Exchange traded
Assets
Derivative receivables	24,034	22,732
Liabilities
Derivative payables	24,373	21,908
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts
Assets
Derivative receivables	16,287	28,324
Liabilities
Derivative payables	17,260	26,318
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Over-the-counter
Assets
Derivative receivables	15,460	27,285
Liabilities
Derivative payables	16,226	24,912
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Exchange traded
Assets
Derivative receivables	827	1,039
Liabilities
Derivative payables	1,034	1,406
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives
Assets
Derivative receivables	12,642	8,389
Liabilities
Derivative payables	11,077	7,777
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Over-the-counter
Assets
Derivative receivables	6,922	6,836
Liabilities
Derivative payables	5,744	5,807
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Cleared
Assets
Derivative receivables	5,720	1,553
Liabilities
Derivative payables	$ 5,333	$ 1,970