DERIVATIVES ACTIVITIES (Details 3) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Gain (loss) from derivative, trading and non-trading
Principal transactions	$ 2,616,000,000	$ 2,362,000,000	$ 5,783,000,000	$ 6,478,000,000
Other revenue	1,085,000,000	(3,022,000,000)	2,385,000,000	(5,882,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	274,000,000	3,343,000,000	(1,460,000,000)	4,039,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(363,000,000)	(3,403,000,000)	1,225,000,000	(4,039,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(23,000,000)	(94,000,000)	(137,000,000)	(60,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	(66,000,000)	34,000,000	(98,000,000)	60,000,000
Pretax change in Accumulated other comprehensive income (loss) from cash flow hedges
Effective portion of cash flow hedges included in AOCI	(511,000,000)	(782,000,000)	(658,000,000)	(1,014,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(393,000,000)	(467,000,000)	(804,000,000)	(1,015,000,000)
Cash flow hedges expected to be reclassified within 12 months			1,300,000,000
Maximum length of time hedged in cash flow hedge			10Y
Net investment hedge, pretax loss recorded in the Foreign currency translation adjustment account within Accumulated other comprehensive income (loss)	(990,000,000)	666,000,000	(1,874,000,000)	476,000,000
Interest rate contracts
Gain (loss) from derivative, trading and non-trading
Principal transactions	1,722,000,000	2,376,000,000	3,346,000,000	3,750,000,000
Other revenue	173,000,000	(155,000,000)	(63,000,000)	(198,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	780,000,000	1,427,000,000	(465,000,000)	2,365,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(820,000,000)	(1,543,000,000)	294,000,000	(2,448,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(25,000,000)	(120,000,000)	(134,000,000)	(87,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	(15,000,000)	4,000,000	(37,000,000)	4,000,000
Pretax change in Accumulated other comprehensive income (loss) from cash flow hedges
Effective portion of cash flow hedges included in AOCI	(519,000,000)	(384,000,000)	(557,000,000)	(625,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(329,000,000)	(364,000,000)	(666,000,000)	(734,000,000)
Foreign exchange contracts
Gain (loss) from derivative, trading and non-trading
Principal transactions	595,000,000	262,000,000	1,382,000,000	503,000,000
Other revenue	951,000,000	(3,008,000,000)	2,672,000,000	(5,825,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(506,000,000)	1,916,000,000	(995,000,000)	1,674,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	457,000,000	(1,860,000,000)	931,000,000	(1,591,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	2,000,000	26,000,000	(3,000,000)	27,000,000
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	(51,000,000)	30,000,000	(61,000,000)	56,000,000
Pretax change in Accumulated other comprehensive income (loss) from cash flow hedges
Effective portion of cash flow hedges included in AOCI	8,000,000	(398,000,000)	(101,000,000)	(389,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(64,000,000)	(103,000,000)	(138,000,000)	(281,000,000)
Equity contracts
Gain (loss) from derivative, trading and non-trading
Principal transactions	147,000,000	(250,000,000)	575,000,000	315,000,000
Commodity and other contracts
Gain (loss) from derivative, trading and non-trading
Principal transactions	49,000,000	121,000,000	24,000,000	230,000,000
Credit derivatives
Gain (loss) from derivative, trading and non-trading
Principal transactions	103,000,000	(147,000,000)	456,000,000	1,680,000,000
Other revenue	$ (39,000,000)	$ 141,000,000	$ (224,000,000)	$ 141,000,000