LOANS (Details 8) (Corporate, USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Financing receivable impaired
Number of months in sustained period of repayment performance for cash-basis loans to return to an accrual status				6 months
Recorded investment	$ 1,350	[1]		$ 1,350	[1]		$ 1,908	[1]
Unpaid principal balance	1,856			1,856			2,513
Related specific allowance	266			266			268
Average carrying value				1,525	[2]		2,183	[2]
Interest Income Recognized	14	[3]	6	39	[3]	24
Impaired financing receivable with specific allowance	435	[1]		435	[1]		925	[1]
Impaired financing receivable without specific allowance	914	[1]		914	[1]		983	[1]
Commercial and industrial
Financing receivable impaired
Recorded investment	733	[1]		733	[1]		769	[1]
Unpaid principal balance	1,059			1,059			1,074
Related specific allowance	197			197			79
Average carrying value				707	[2]		967	[2]
Interest Income Recognized	10	[3]		24	[3]
Impaired financing receivable with specific allowance	266	[1]		266	[1]		401	[1]
Impaired financing receivable without specific allowance	466	[1]		466	[1]		368	[1]
Financial institutions
Financing receivable impaired
Recorded investment	266	[1]		266	[1]		365	[1]
Unpaid principal balance	277			277			382
Related specific allowance	4			4			3
Average carrying value				306	[2]		378	[2]
Interest Income Recognized	0	[3]		4	[3]
Impaired financing receivable with specific allowance	17	[1]		17	[1]		24	[1]
Impaired financing receivable without specific allowance	249	[1]		249	[1]		341	[1]
Mortgage and real estate
Financing receivable impaired
Recorded investment	237	[1]		237	[1]		515	[1]
Unpaid principal balance	276			276			651
Related specific allowance	17			17			35
Average carrying value				329	[2]		585	[2]
Interest Income Recognized	0	[3]		7	[3]
Impaired financing receivable with specific allowance	42	[1]		42	[1]		253	[1]
Impaired financing receivable without specific allowance	196	[1]		196	[1]		262	[1]
Lease financing
Financing receivable impaired
Recorded investment	49	[1]		49	[1]		189	[1]
Unpaid principal balance	50			50			190
Related specific allowance	29			29			131
Average carrying value				119	[2]		189	[2]
Impaired financing receivable with specific allowance	47	[1]		47	[1]		186	[1]
Impaired financing receivable without specific allowance	2	[1]		2	[1]		3	[1]
Other
Financing receivable impaired
Recorded investment	65	[1]		65	[1]		70	[1]
Unpaid principal balance	194			194			216
Related specific allowance	19			19			20
Average carrying value				64	[2]		64	[2]
Interest Income Recognized	4	[3]		4	[3]
Impaired financing receivable with specific allowance	63	[1]		63	[1]		61	[1]
Impaired financing receivable without specific allowance	$ 1	[1]		$ 1	[1]		$ 9	[1]

[1] Recorded investment in a loan includes net deferred loan fees and costs, unamortized premium or discount, less any direct write-downs.

[2] Average carrying value represents the average recorded investment balance and does not include related specific allowance.

[3] Interest income recognized for the three- and nine-month periods ended September 30, 2013 was $6 million and $24 million, respectively.