SECURITIZATIONS AND VARIABLE INTEREST ENTITIES (Details 7) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Re-securitizations
Balance at end of period	$ 2,718,000,000	$ 1,942,000,000
Mortgage servicing rights
Classification of Securitizations
Fair value of capitalized mortgage servicing rights	2,700,000,000	1,900,000,000
Principal amount of loans and other financial instruments	286,000,000,000	325,000,000,000
Re-securitizations
Balance at beginning of period	1,942,000,000	2,569,000,000
Originations	634,000,000	423,000,000
Changes in fair value of MSRs due to changes in inputs and assumptions	640,000,000	(198,000,000)
Other changes	(496,000,000)	(852,000,000)
Sale of MSRs	(2,000,000)
Balance at end of period	2,718,000,000	1,942,000,000	2,569,000,000
Servicing fees	800,000,000	990,000,000	1,170,000,000
Late fees	42,000,000	65,000,000	76,000,000
Ancillary fees	100,000,000	122,000,000	130,000,000
Total MSR fees	942,000,000	1,177,000,000	1,376,000,000
Non-agency-sponsored mortgages
Re-securitizations
Original par value of securities transferred to re-securitization entities	955,000,000	1,500,000,000
Original par value of re-securitizations deals in which the entity holds a retained interest	6,100,000,000	7,100,000,000
Fair value of re-securitizations deals in which the entity holds a retained interest	425,000,000	380,000,000
Market value of retained interest related to re-securitization transaction	131,000,000	128,000,000
Senior interests
Re-securitizations
Fair value of re-securitizations deals in which the entity holds a retained interest	58,000,000	11,000,000
Subordinated interests
Re-securitizations
Fair value of re-securitizations deals in which the entity holds a retained interest	367,000,000	369,000,000
U.S. government-sponsored agency guaranteed
Re-securitizations
Fair value of re-securitizations deals in which the entity holds a retained interest	1,500,000,000	1,700,000,000
Market value of retained interest related to re-securitization transaction	1,200,000,000	1,100,000,000
Original fair value of re-securitizations deals in which the entity holds a retained interest	75,500,000,000	71,200,000,000
Securities transferred to re-securitization entities	$ 26,300,000,000	$ 30,300,000,000