DERIVATIVES ACTIVITIES (Details 4) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ (942,000,000)	$ 1,085,000,000	$ (1,262,000,000)	$ 2,385,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	2,099,000,000	274,000,000	857,000,000	(1,460,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(1,925,000,000)	(363,000,000)	(905,000,000)	1,225,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	164,000,000	(23,000,000)	(71,000,000)	(137,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	10,000,000	(66,000,000)	23,000,000	(98,000,000)
Pretax change in accumulated other comprehensive income (loss)
Cash flow hedges expected to be reclassified within 12 months			1,000,000,000
Maximum length of time hedged in cash flow hedge			10 years
Interest rate contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	265,000,000	173,000,000	(170,000,000)	(63,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	1,945,000,000	780,000,000	453,000,000	(465,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(1,789,000,000)	(820,000,000)	(535,000,000)	294,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	156,000,000	(25,000,000)	(82,000,000)	(134,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges		(15,000,000)		(37,000,000)
Foreign exchange contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(1,310,000,000)	951,000,000	(766,000,000)	2,672,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	154,000,000	(506,000,000)	404,000,000	(995,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(136,000,000)	457,000,000	(370,000,000)	931,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	8,000,000	2,000,000	11,000,000	(3,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	10,000,000	(51,000,000)	23,000,000	(61,000,000)
Credit derivatives
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	103,000,000	(39,000,000)	(326,000,000)	(224,000,000)
Cash Flow Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	(407,000,000)	(511,000,000)	(325,000,000)	(658,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(267,000,000)	(393,000,000)	(545,000,000)	(804,000,000)
Cash Flow Hedges | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	(278,000,000)	(519,000,000)	(265,000,000)	(557,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(223,000,000)	(329,000,000)	(461,000,000)	(666,000,000)
Cash Flow Hedges | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	(129,000,000)	8,000,000	(60,000,000)	(101,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(44,000,000)	(64,000,000)	(84,000,000)	(138,000,000)
Net Investment Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	$ 949,000,000	$ (990,000,000)	$ (1,056,000,000)	$ (1,874,000,000)