FEDERAL FUNDS/SECURITIES BORROWED, LOANED, AND SUBJECT TO REPURCHASE AGREEMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Securities purchased under agreements to resell
Gross Amounts of Recognized Assets	$ 202,464	$ 187,950
Gross Amounts Offset on the Consolidated Balance Sheet	66,233	49,401
Net Amounts of Assets Presented on the Consolidated Balance Sheet	136,231	138,549
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	120,476	111,745
Net Amounts	15,755	26,804
Deposits paid for securities borrowed
Gross Amounts of Recognized Assets	126,686	122,665
Net Amounts of Assets Presented on the Consolidated Balance Sheet	126,686	122,665
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	34,713	34,733
Net Amounts	91,973	87,932
Total
Total	329,150	310,615
Gross Amounts Offset on the Consolidated Balance Sheet	66,233	49,401
Net Amounts of Assets Presented on the Consolidated Balance Sheet	262,917	261,214
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	155,189	146,478
Net Amounts	107,728	114,736
Securities sold under agreements to repurchase
Gross Amounts of Recognized Liabilities	252,488	231,731
Gross Amounts Offset on the Consolidated Balance Sheet	66,233	49,401
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	186,255	182,330
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	115,655	104,681
Net Amounts	70,600	77,649
Deposits received for securities loaned
Gross Amounts of Recognized Liabilities	31,375	27,901
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	31,375	27,901
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	29,906	15,579
Net Amounts	1,469	12,322
Total
Gross Amounts of Recognized Liabilities	283,863	259,632
Gross Amounts Offset on the Consolidated Balance Sheet	66,233	49,401
Net Amounts of Liabilities Presented on the Consolidated Balance Sheet	217,630	210,231
Amounts Not Offset on the Consolidated Balance Sheet but Eligible for Offsetting Upon Counterparty Default	145,561	120,260
Net Amounts	$ 72,069	$ 89,971