DERIVATIVES - Derivative Mark-to-Market (MTM) Receivables/Payables (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Trading account assets
Assets
Derivative receivables	$ 427,941	$ 386,851
Less: Netting agreements to assets	(319,683)	(292,628)
Less: Netting of cash collateral received	(29,269)	(24,447)
Total trading account derivatives, assets	78,989	69,776
Less: Cash collateral received	(905)	(907)
Less: Non-cash collateral received	(4,646)	(5,777)
Total net receivables	73,438	63,092
Liabilities
Does not meet applicable offsetting guidance, assets	10,000	10,000
Trading account assets | Over-the-counter
Liabilities
Less: Netting agreements to liabilities	(272,000)	(259,000)
Trading account assets | Cleared
Liabilities
Less: Netting agreements to liabilities	(24,000)	(14,000)
Trading account assets | Exchange traded
Liabilities
Less: Netting agreements to liabilities	(24,000)	(20,000)
Trading accounts liabilities
Liabilities
Derivative payables	412,401	377,450
Less: Netting agreements to liabilities	(319,683)	(292,628)
Less: Netting of cash collateral paid	(25,616)	(29,306)
Total derivative liabilities	67,102	55,516
Less: Cash collateral paid	(603)	(538)
Less: Non-cash collateral paid	(14,112)	(13,607)
Total net payables	52,387	41,371
Does not meet applicable offsetting guidance, liabilities	14,000	11,000
Trading accounts liabilities | Over-the-counter
Assets
Less: Netting agreements to assets	(272,000)	(259,000)
Trading accounts liabilities | Cleared
Assets
Less: Netting agreements to assets	(24,000)	(14,000)
Trading accounts liabilities | Exchange traded
Assets
Less: Netting agreements to assets	(24,000)	(20,000)
Derivative instruments designated as ASC 815 hedges | Trading account assets
Assets
Derivative receivables	2,465	2,633
Derivative instruments designated as ASC 815 hedges | Trading accounts liabilities
Liabilities
Derivative payables	2,253	1,567
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets
Assets
Derivative receivables	1,025	1,289
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	952	1,167
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Cleared
Assets
Derivative receivables	73	122
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities
Liabilities
Derivative payables	332	95
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	45	6
Derivative instruments designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	287	89
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets
Assets
Derivative receivables	1,440	1,344
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	1,435	1,338
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Cleared
Assets
Derivative receivables	5	6
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities
Liabilities
Derivative payables	1,921	1,472
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	1,921	1,472
Derivative instruments designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	0	0
Derivatives instruments not designated as ASC 815 hedges | Trading account assets
Assets
Derivative receivables	425,476	384,218
Derivatives instruments not designated as ASC 815 hedges | Trading accounts liabilities
Liabilities
Derivative payables	410,148	375,883
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets
Assets
Derivative receivables	166,017	164,199
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	138,507	152,524
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Cleared
Assets
Derivative receivables	27,216	11,579
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	294	96
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities
Liabilities
Derivative payables	154,822	149,979
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	127,869	138,114
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	26,671	11,821
Derivatives instruments not designated as ASC 815 hedges | Interest rate contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	282	44
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets
Assets
Derivative receivables	152,419	134,205
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	151,970	133,357
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading account assets | Cleared
Assets
Derivative receivables	449	848
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities
Liabilities
Derivative payables	147,055	133,826
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	146,513	133,548
Derivatives instruments not designated as ASC 815 hedges | Foreign exchange contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	542	278
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets
Assets
Derivative receivables	46,185	45,252
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	22,691	23,452
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Cleared
Assets
Derivative receivables	26	19
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	23,468	21,781
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities
Liabilities
Derivative payables	51,826	49,684
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	27,205	28,352
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	5	0
Derivatives instruments not designated as ASC 815 hedges | Equity contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	24,616	21,332
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets
Assets
Derivative receivables	49,612	30,344
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets | Over-the-counter
Assets
Derivative receivables	47,267	29,279
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading account assets | Exchange traded
Assets
Derivative receivables	2,345	1,065
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities
Liabilities
Derivative payables	45,299	31,379
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	41,997	29,833
Derivatives instruments not designated as ASC 815 hedges | Commodity and other contracts | Trading accounts liabilities | Exchange traded
Liabilities
Derivative payables	3,302	1,546
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets
Assets
Derivative receivables	11,243	10,218
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets | Over-the-counter
Assets
Derivative receivables	8,117	6,896
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading account assets | Cleared
Assets
Derivative receivables	3,126	3,322
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities
Liabilities
Derivative payables	11,146	11,015
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities | Over-the-counter
Liabilities
Derivative payables	7,787	6,959
Derivatives instruments not designated as ASC 815 hedges | Credit derivatives | Trading accounts liabilities | Cleared
Liabilities
Derivative payables	$ 3,359	$ 4,056