LOANS (Details 9) (Corporate, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financing receivable impaired
Carrying Value	$ 54	$ 41	$ 132	$ 268
TDRs involving changes in the amount and/or timing of principal payments	7	1	84	3
TDRs involving changes in the amount and/or timing of interest payments	4		4
TDRs involving changes in the amount and/or timing of both principal and interest payments	43	40	44	265
Balance of principal forgiven or deferred		1		4
Net P&L Impact		1	1	38
Carrying Value	1,143	1,349	1,143	1,349
TDR Loans in payment default	7	1	7	1
Commercial and industrial
Financing receivable impaired
Carrying Value	22	40	39	40
TDRs involving changes in the amount and/or timing of principal payments	7		24
TDRs involving changes in the amount and/or timing of interest payments	4		4
TDRs involving changes in the amount and/or timing of both principal and interest payments	11	40	11	40
Net P&L Impact		1	1	1
Carrying Value	388	367	388	367
TDR Loans in payment default	7	1	7	1
Loans to financial institutions
Financing receivable impaired
Carrying Value	30		30
Mortgage and real estate
Financing receivable impaired
Carrying Value	32	1	93	228
TDRs involving changes in the amount and/or timing of principal payments		1	60	3
TDRs involving changes in the amount and/or timing of both principal and interest payments	32		33	225
Balance of principal forgiven or deferred		1		4
Net P&L Impact				37
Carrying Value	153	364	153	364
Other
Financing receivable impaired
Carrying Value	$ 572	$ 618	$ 572	$ 618