LOANS (Details 5) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Loans
Loans, net of unearned income	$ 665,472	$ 655,464
Corporate
Loans
Total loans	272,203	247,590
Net unearned income (loss)	(562)	(797)
Loans, net of unearned income	271,641	246,793
Corporate | Commercial and industrial
Loans
Loans, net of unearned income	113,831	108,776
Corporate | Financial institutions
Loans
Loans, net of unearned income	62,069	54,317
Corporate | Mortgage and real estate
Loans
Loans, net of unearned income	34,900	31,070
Corporate | Lease financing
Loans
Loans, net of unearned income	2,174	2,015
In U.S. offices | Corporate
Loans
Total loans	123,312	103,705
In U.S. offices | Corporate | Commercial and industrial
Loans
Total loans	32,704	26,985
In U.S. offices | Corporate | Financial institutions
Loans
Total loans	25,102	18,159
In U.S. offices | Corporate | Mortgage and real estate
Loans
Total loans	29,425	24,705
In U.S. offices | Corporate | Installment, revolving credit and other
Loans
Total loans	34,434	32,446
In U.S. offices | Corporate | Lease financing
Loans
Total loans	1,647	1,410
In offices outside the U.S. | Corporate
Loans
Total loans	148,891	143,885
In offices outside the U.S. | Corporate | Commercial and industrial
Loans
Total loans	82,663	82,939
In offices outside the U.S. | Corporate | Financial institutions
Loans
Total loans	38,372	37,739
In offices outside the U.S. | Corporate | Mortgage and real estate
Loans
Total loans	6,274	6,485
In offices outside the U.S. | Corporate | Installment, revolving credit and other
Loans
Total loans	18,714	14,958
In offices outside the U.S. | Corporate | Lease financing
Loans
Total loans	527	605
In offices outside the U.S. | Corporate | Government and official institutions
Loans
Total loans	$ 2,341	$ 1,159