DERIVATIVES ACTIVITIES (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Derivative Notionals
Hedging instruments	$ 305,361	$ 287,998
Trading derivatives	53,903,397	47,517,847
Management hedges	279,446	293,682
Notional amount of a foreign currency denominated debt instrument to hedge the foreign currency risk of a net investment in a foreign operation	7,705	8,023
Interest rate contracts
Derivative Notionals
Hedging instruments	155,645	155,972
Trading derivatives	43,065,846	38,695,495
Management hedges	200,531	208,911
Interest rate contracts | Swaps
Derivative Notionals
Hedging instruments	155,645	155,972
Trading derivatives	29,577,006	27,084,014
Management hedges	129,319	135,979
Interest rate contracts | Futures and forwards
Derivative Notionals
Trading derivatives	4,895,690	4,874,209
Management hedges	44,092	46,140
Interest rate contracts | Written options
Derivative Notionals
Trading derivatives	4,294,253	3,431,608
Management hedges	9,639	8,762
Interest rate contracts | Purchased options
Derivative Notionals
Trading derivatives	4,298,897	3,305,664
Management hedges	17,481	18,030
Foreign exchange contracts
Derivative Notionals
Hedging instruments	145,279	127,098
Trading derivatives	6,217,856	4,999,589
Management hedges	53,678	56,245
Foreign exchange contracts | Swaps
Derivative Notionals
Hedging instruments	30,117	29,599
Trading derivatives	1,215,696	1,118,610
Management hedges	25,815	27,830
Foreign exchange contracts | Futures and forwards
Derivative Notionals
Hedging instruments	79,866	79,168
Trading derivatives	3,648,631	2,745,922
Management hedges	27,572	28,191
Foreign exchange contracts | Written options
Derivative Notionals
Hedging instruments	1,602	1,772
Trading derivatives	705,968	599,025
Management hedges	234	50
Foreign exchange contracts | Purchased options
Derivative Notionals
Hedging instruments	33,694	16,559
Trading derivatives	647,561	536,032
Management hedges	57	174
Equity contracts
Derivative Notionals
Trading derivatives	1,496,869	1,052,593
Equity contracts | Swaps
Derivative Notionals
Trading derivatives	93,129	67,637
Equity contracts | Futures and forwards
Derivative Notionals
Trading derivatives	22,071	19,816
Equity contracts | Written options
Derivative Notionals
Trading derivatives	708,789	491,519
Equity contracts | Purchased options
Derivative Notionals
Trading derivatives	672,880	473,621
Commodity and other contracts
Derivative Notionals
Trading derivatives	327,238	257,815
Commodity and other contracts | Swaps
Derivative Notionals
Trading derivatives	23,748	19,213
Commodity and other contracts | Futures and forwards
Derivative Notionals
Trading derivatives	133,634	115,578
Commodity and other contracts | Written options
Derivative Notionals
Trading derivatives	83,687	61,248
Commodity and other contracts | Purchased options
Derivative Notionals
Trading derivatives	86,169	61,776
Credit derivatives
Derivative Notionals
Hedging instruments	4,437	4,928
Trading derivatives	2,795,588	2,512,355
Management hedges	25,237	28,526
Credit derivatives | Protection sold
Derivative Notionals
Trading derivatives	1,352,785	1,223,116
Credit derivatives | Protection purchased
Derivative Notionals
Hedging instruments	4,437	4,928
Trading derivatives	1,442,803	1,289,239
Management hedges	$ 25,237	$ 28,526