LOANS (Details 5) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Loans
Loans, net of unearned income	$ 212,613	$ 193,062
In U.S. offices | Corporate
Loans
Total loans	85,783	77,893
In U.S. offices | Corporate | Mortgage and real estate
Loans
Total loans	20,426	19,693
In U.S. offices | Corporate | Installment, revolving credit and other
Loans
Total loans	14,359	12,640
In U.S. offices | Corporate | Commercial and industrial
Loans
Total loans	18,361	14,334
In U.S. offices | Corporate | Lease financing
Loans
Total loans	1,396	1,413
In U.S. offices | Corporate | Loans to financial institutions
Loans
Total loans	31,241	29,813
In offices outside the U.S. | Corporate
Loans
Total loans	127,492	116,141
In offices outside the U.S. | Corporate | Mortgage and real estate
Loans
Total loans	6,015	5,899
In offices outside the U.S. | Corporate | Installment, revolving credit and other
Loans
Total loans	14,733	11,829
In offices outside the U.S. | Corporate | Commercial and industrial
Loans
Total loans	75,661	71,618
In offices outside the U.S. | Corporate | Lease financing
Loans
Total loans	469	531
In offices outside the U.S. | Corporate | Loans to financial institutions
Loans
Total loans	27,069	22,620
In offices outside the U.S. | Corporate | Government and official institutions
Loans
Total loans	3,545	3,644
Corporate
Loans
Total loans	213,275	194,034
Net unearned income	(662)	(972)
Loans, net of unearned income	$ 212,613	$ 193,062