DERIVATIVES ACTIVITIES (Details 3) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	$ (1,367,000,000)	$ (320,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(1,226,000,000)	(1,242,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	1,238,000,000	1,020,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(14,000,000)	(235,000,000)
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	26,000,000	13,000,000
Pretax change in accumulated other comprehensive income (loss)
Cash flow hedges expected to be reclassified within 12 months	900,000,000
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	(185,000,000)	(435,000,000)
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(934,000,000)	(1,492,000,000)
Gain (loss) on the hedged item in designated and qualifying fair value hedges	932,000,000	1,254,000,000
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(2,000,000)	(238,000,000)
Foreign exchange contracts
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(1,071,000,000)	544,000,000
Gain (loss) on fair value hedges
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(292,000,000)	250,000,000
Gain (loss) on the hedged item in designated and qualifying fair value hedges	306,000,000	(234,000,000)
Hedge ineffectiveness recognized in earnings on designated and qualifying fair value hedges	(12,000,000)	3,000,000
Net gain (loss) excluded from assessment of the effectiveness of fair value hedges	26,000,000	13,000,000
Credit derivatives
Derivative gain (loss)
Gains (losses) recognized in Other revenue related to derivatives not designated in a qualifying hedging relationship	(111,000,000)	(429,000,000)
Net Investment Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	489,000,000	(2,005,000,000)
Ineffectiveness recorded in earnings	0
Cash Flow Hedges
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	(25,000,000)	82,000,000
Effective portion of cash flow hedges reclassified from AOCI to earnings	(226,000,000)	(277,000,000)
Cash Flow Hedges | Interest rate contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	39,000,000	13,000,000
Effective portion of cash flow hedges reclassified from AOCI to earnings	(183,000,000)	(237,000,000)
Cash Flow Hedges | Foreign exchange contracts
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	(68,000,000)	69,000,000
Effective portion of cash flow hedges reclassified from AOCI to earnings	(43,000,000)	(40,000,000)
Cash Flow Hedges | Credit derivatives
Pretax change in accumulated other comprehensive income (loss)
Effective portion of cash flow hedges included in AOCI	$ 4,000,000