LOANS (Details 4) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Loans
Loans, net of unearned income	$ 204,456	$ 191,162
In U.S. offices | Corporate.
Loans
Total loans	81,447.0	77,893.0
In U.S. offices | Corporate. | Mortgage and real estate
Loans
Total loans	20,596.0	19,693.0
In U.S. offices | Corporate. | Installment, revolving credit and other
Loans
Total loans	14,105.0	12,640.0
In U.S. offices | Corporate. | Commercial and industrial
Loans
Total loans	16,343.0	14,334.0
In U.S. offices | Corporate. | Lease financing
Loans
Total loans	1,498.0	1,413.0
In U.S. offices | Corporate. | Financial institutions
Loans
Total loans	28,905.0	29,813.0
In offices outside the U.S. | Corporate.
Loans
Total loans	123,666.0	114,241.0
In offices outside the U.S. | Corporate. | Mortgage and real estate
Loans
Total loans	6,529.0	5,899.0
In offices outside the U.S. | Corporate. | Installment, revolving credit and other
Loans
Total loans	12,964.0	11,829.0
In offices outside the U.S. | Corporate. | Commercial and industrial
Loans
Total loans	73,594.0	69,718.0
In offices outside the U.S. | Corporate. | Lease financing
Loans
Total loans	491.0	531.0
In offices outside the U.S. | Corporate. | Financial institutions
Loans
Total loans	27,361.0	22,620.0
In offices outside the U.S. | Corporate. | Government and official institutions
Loans
Total loans	2,727.0	3,644.0
Corporate.
Loans
Total loans	205,113.0	192,134.0
Net unearned income	(657)	(972)
Loans, net of unearned income	$ 204,456	$ 191,162