LOANS (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
LOANS
Number of loan categories	2
Loans
Loans, net of unearned income	$ 648,022,000,000		$ 647,242,000,000
Consumer
Loans
Total loans	416,483,000,000		423,745,000,000
Net unearned income (loss)	(380,000,000)		(405,000,000)
Loans, net of unearned income	416,103,000,000		423,340,000,000
Sold and/or reclassified consumer loans	600,000,000	6,900,000,000
In U.S. offices | Consumer
Loans
Total loans	266,112,000,000		277,468,000,000
In U.S. offices | Consumer | Mortgage and real estate
Loans
Total loans	136,325,000,000		139,177,000,000
In U.S. offices | Consumer | Installment, revolving credit and other
Loans
Total loans	14,942,000,000		15,616,000,000
In U.S. offices | Consumer | Credit cards
Loans
Total loans	110,049,000,000		117,908,000,000
In U.S. offices | Consumer | Commercial and industrial
Loans
Total loans	4,796,000,000		4,766,000,000
In U.S. offices | Consumer | Lease financing
Loans
Total loans			1,000,000
In offices outside the U.S. | Consumer
Loans
Total loans	150,371,000,000		146,277,000,000
In offices outside the U.S. | Consumer | Mortgage and real estate
Loans
Total loans	53,652,000,000		52,052,000,000
In offices outside the U.S. | Consumer | Installment, revolving credit and other
Loans
Total loans	35,813,000,000		34,613,000,000
In offices outside the U.S. | Consumer | Credit cards
Loans
Total loans	39,319,000,000		38,926,000,000
In offices outside the U.S. | Consumer | Commercial and industrial
Loans
Total loans	20,830,000,000		19,975,000,000
In offices outside the U.S. | Consumer | Lease financing
Loans
Total loans	$ 757,000,000		$ 711,000,000