LOANS (Details 9) (Corporate, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing receivable impaired
Carrying Value	$ 48	$ 160	$ 180	$ 428
TDRs involving changes in the amount and/or timing of principal payments	47		131	3
TDRs involving changes in the amount and/or timing of interest payments		81	4	81
TDRs involving changes in the amount and/or timing of both principal and interest payments	1	79	45	344
Balance of principal forgiven or deferred				4
Net P&L Impact		15	1	53
Carrying Value	1,100	1,361	1,100	1,361
TDR in payment default	45	6	52	7
Commercial and industrial
Financing receivable impaired
Carrying Value	47	70	86	110
TDRs involving changes in the amount and/or timing of principal payments	47		71
TDRs involving changes in the amount and/or timing of interest payments			4
TDRs involving changes in the amount and/or timing of both principal and interest payments		70	11	110
Net P&L Impact		15	1	16
Carrying Value	395	419	395	419
TDR in payment default	45	6	52	7
Loans to financial institutions
Financing receivable impaired
Carrying Value	21	579	21	579
Mortgage and real estate
Financing receivable impaired
Carrying Value	1	16	94	244
TDRs involving changes in the amount and/or timing of principal payments			60	3
TDRs involving changes in the amount and/or timing of interest payments		14		14
TDRs involving changes in the amount and/or timing of both principal and interest payments	1	2	34	227
Balance of principal forgiven or deferred				4
Net P&L Impact				37
Carrying Value	127	263	127	263
Other
Financing receivable impaired
Carrying Value		74		74
TDRs involving changes in the amount and/or timing of interest payments		67		67
TDRs involving changes in the amount and/or timing of both principal and interest payments		7		7
Carrying Value	$ 557	$ 100	$ 557	$ 100