FAIR VALUE ELECTIONS (Details 2) (USD $)	3 Months Ended		9 Months Ended								9 Months Ended					9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Forward purchase derivative contract	Sep. 30, 2013 Forward sale derivative contract	Sep. 30, 2013 Consolidated VIEs	Dec. 31, 2012 Consolidated VIEs	Sep. 30, 2013 Certain credit products (Trading account assets)	Dec. 31, 2012 Certain credit products (Trading account assets)	Sep. 30, 2013 Certain credit products (Loans)	Sep. 30, 2012 Certain credit products (Loans)	Dec. 31, 2012 Certain credit products (Loans)	Sep. 30, 2013 Certain mortgage loans (long-term debts)	Dec. 31, 2012 Certain mortgage loans (long-term debts)	Sep. 30, 2013 Certain mortgage loans (long-term debts) Consolidated VIEs	Sep. 30, 2012 Certain mortgage loans (long-term debts) Consolidated VIEs	Sep. 30, 2013 VIE Corporate loans	Dec. 31, 2012 VIE Corporate loans	Sep. 30, 2013 VIE Consumer loans	Dec. 31, 2012 VIE Consumer loans	Sep. 30, 2013 Long-term debt:	Dec. 31, 2012 Long-term debt:	Sep. 30, 2013 Short-term borrowings:	Dec. 31, 2012 Short-term borrowings:	Sep. 30, 2013 Certain Investments in Unallocated Precious Metals	Dec. 31, 2012 Certain Investments in Unallocated Precious Metals
FAIR VALUE ELECTIONS
Gain (loss) on change in estimated fair value of debt liabilities due to change in company's own credit risk	$ (241,000,000)	$ (560,000,000)	$ (249,000,000)	$ (1,552,000,000)
Fair Value Option Quantitative Disclosures
Derivative notional					13,400,000,000	9,300,000,000
Carrying amount reported on the Consolidated Balance Sheet									10,382,000,000	11,658,000,000	4,031,000,000		3,893,000,000	3,426,000,000	6,879,000,000			15,000,000	157,000,000	951,000,000	1,191,000,000
Aggregate fair value in excess of unpaid principal balance														101,000,000	390,000,000
Aggregate unpaid principal balance in excess of (less than) fair value									(751,000,000)	31,000,000	(71,000,000)		(132,000,000)					10,000,000	347,000,000	213,000,000	293,000,000
Balance of non-accrual loans or loans more than 90 days past due									97,000,000	104,000,000									34,000,000	128,000,000	123,000,000
Aggregate unpaid principal balance in excess of fair value for non-accrual loans or loans more than 90 days past due									41,000,000	85,000,000									36,000,000	64,000,000	111,000,000
Unfunded loan commitments outstanding, certain credit related products											2,188,000,000		1,891,000,000
Changes in fair value due to instrument-specific credit risk gain (loss)											18,000,000	46,000,000				(115,000,000)	(78,000,000)
Carrying amount reported on the Consolidated Balance Sheet																						25,663,000,000	28,434,000,000	4,495,000,000	818,000,000
Carrying amount reported on the Consolidated Balance Sheet																										1,500,000,000	5,500,000,000
Aggregate unpaid principal balance in excess of (less than) fair value							$ 234,000,000	$ 869,000,000														$ 802,000,000	$ (804,000,000)	$ 82,000,000	$ (232,000,000)