DERIVATIVES ACTIVITIES (Details 3) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ 45,000,000	$ (942,000,000)	$ (1,322,000,000)	$ (1,262,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(1,518,000,000)	2,099,000,000	(2,744,000,000)	857,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	1,532,000,000	(1,925,000,000)	2,770,000,000	(905,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(15,000,000)	164,000,000	(29,000,000)	(71,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	29,000,000	10,000,000	55,000,000	23,000,000
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
Payments to protection buyer			0
Interest rate contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(65,000,000)	265,000,000	(250,000,000)	(170,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(1,557,000,000)	1,945,000,000	(2,491,000,000)	453,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	1,536,000,000	(1,789,000,000)	2,468,000,000	(535,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(21,000,000)	156,000,000	(23,000,000)	(82,000,000)
Foreign exchange contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	169,000,000	(1,310,000,000)	(902,000,000)	(766,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	39,000,000	154,000,000	(253,000,000)	404,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(4,000,000)	(136,000,000)	302,000,000	(370,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	6,000,000	8,000,000	(6,000,000)	11,000,000
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	29,000,000	10,000,000	55,000,000	23,000,000
Credit derivatives
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(59,000,000)	103,000,000	(170,000,000)	(326,000,000)
Cash Flow Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	559,000,000	(407,000,000)	534,000,000	(325,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(245,000,000)	(267,000,000)	(471,000,000)	(545,000,000)
Cash Flow Hedges | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	474,000,000	(278,000,000)	513,000,000	(265,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(202,000,000)	(223,000,000)	(385,000,000)	(461,000,000)
Cash Flow Hedges | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	71,000,000	(129,000,000)	3,000,000	(60,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(43,000,000)	(44,000,000)	(86,000,000)	(84,000,000)
Cash Flow Hedges | Credit derivatives
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	14,000,000		18,000,000
Net Investment Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	1,572,000,000	949,000,000	2,062,000,000	(1,056,000,000)
Ineffectiveness recorded in earnings			$ 0