DERIVATIVES ACTIVITIES (Details 4) (USD $)	3 Months Ended
	Mar. 31, 2013 item	Dec. 31, 2012
Credit Derivative
Maximum potential amount of future payments	$ 1,380,859,000,000	$ 1,346,494,000,000
Fair value payable	28,238,000,000	31,830,000,000
Fair value of derivative in liability position	35,000,000,000	36,000,000,000
Fair value of collateral already posted	31,000,000,000	32,000,000,000
Number of rating agencies	3
Additional collateral to be posted	4,000,000,000
Collateral to be segregated	200,000,000
Aggregate cash obligations and collateral requirements	4,200,000,000
Credit derivatives purchased
Credit Derivative
Fair value, amounts payable	21,882,000,000	20,832,000,000
Credit derivatives sold
Credit Derivative
Fair value, amounts receivable	20,526,000,000	19,710,000,000
Within 1 year
Credit Derivative
Maximum potential amount of future payments	278,003,000,000	287,670,000,000
Fair value payable	2,001,000,000	2,388,000,000
From 1 to 5 years
Credit Derivative
Maximum potential amount of future payments	988,220,000,000	965,059,000,000
Fair value payable	19,058,000,000	21,542,000,000
After 5 years
Credit Derivative
Maximum potential amount of future payments	114,636,000,000	93,765,000,000
Fair value payable	7,179,000,000	7,900,000,000
Investment grade
Credit Derivative
Maximum potential amount of future payments	599,304,000,000	637,343,000,000
Fair value payable	5,758,000,000	6,290,000,000
Non-investment grade
Credit Derivative
Maximum potential amount of future payments	203,232,000,000	200,529,000,000
Fair value payable	12,947,000,000	15,591,000,000
Not rated
Credit Derivative
Maximum potential amount of future payments	578,323,000,000	508,622,000,000
Fair value payable	9,533,000,000	9,949,000,000
Credit default swaps and options
Credit Derivative
Maximum potential amount of future payments	1,379,517,000,000	1,345,162,000,000
Fair value payable	28,003,000,000	31,624,000,000
Total return swaps and other
Credit Derivative
Maximum potential amount of future payments	1,342,000,000	1,332,000,000
Fair value payable	235,000,000	206,000,000
Bank
Credit Derivative
Maximum potential amount of future payments	889,238,000,000	863,411,000,000
Fair value payable	17,322,000,000	18,824,000,000
Broker-dealer
Credit Derivative
Maximum potential amount of future payments	313,367,000,000	304,968,000,000
Fair value payable	7,861,000,000	9,193,000,000
Non-financial
Credit Derivative
Maximum potential amount of future payments	3,233,000,000	3,241,000,000
Fair value payable	90,000,000	87,000,000
Insurance and other financial institutions
Credit Derivative
Maximum potential amount of future payments	175,021,000,000	174,874,000,000
Fair value payable	$ 2,965,000,000	$ 3,726,000,000