DERIVATIVES ACTIVITIES (Details 4) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ 305,000,000	$ 100,000,000	$ (957,000,000)	$ 2,485,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	493,000,000	4,733,000,000	1,350,000,000	3,273,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(590,000,000)	(4,820,000,000)	(1,495,000,000)	(3,595,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(132,000,000)	(93,000,000)	(203,000,000)	(230,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	35,000,000	6,000,000	58,000,000	(92,000,000)
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	(122,000,000)	1,090,000,000	(292,000,000)	1,027,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	297,000,000	4,143,000,000	750,000,000	3,678,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(418,000,000)	(4,207,000,000)	(953,000,000)	(3,913,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(121,000,000)	(110,000,000)	(203,000,000)	(244,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges		46,000,000		9,000,000
Foreign exchange contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	825,000,000	(1,576,000,000)	59,000,000	1,096,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	196,000,000	590,000,000	600,000,000	(405,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	(172,000,000)	(613,000,000)	(542,000,000)	318,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(11,000,000)	17,000,000		14,000,000
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	35,000,000	(40,000,000)	58,000,000	(101,000,000)
Credit derivatives
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(398,000,000)	586,000,000	(724,000,000)	362,000,000
Cash Flow Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	53,000,000	(1,197,000,000)	(272,000,000)	(1,855,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(242,000,000)	(345,000,000)	(787,000,000)	(1,149,000,000)
Cash Flow Hedges | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	(59,000,000)	(1,132,000,000)	(324,000,000)	(1,689,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(186,000,000)	(285,000,000)	(647,000,000)	(951,000,000)
Cash Flow Hedges | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	112,000,000	(65,000,000)	52,000,000	(166,000,000)
Effective portion of cash flow hedges reclassified from AOCI to earnings	(56,000,000)	(60,000,000)	(140,000,000)	(198,000,000)
Net Investment Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of hedges included in AOCI	$ (1,580,000,000)	$ 2,776,000,000	$ (2,636,000,000)	$ 902,000,000