LOANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
LOANS
Number of loan categories	2		2
Loans
Loans, net of unearned income	$ 654,968		$ 654,968		$ 647,242
Consumer
Loans
Total loans	409,485		409,485		423,745
Net unearned income (loss)	(358)		(358)		(405)
Loans, net of unearned income	409,127		409,127		423,340
Loans sold and/or reclassified to held-for-sale	800	1,400	10,900	17,800
In U.S. offices | Consumer
Loans
Total loans	262,111		262,111		277,468
In U.S. offices | Consumer | Mortgage and real estate
Loans
Total loans	132,931		132,931		139,177
In U.S. offices | Consumer | Installment, revolving credit and other
Loans
Total loans	14,757		14,757		15,616
In U.S. offices | Consumer | Credit cards
Loans
Total loans	109,755		109,755		117,908
In U.S. offices | Consumer | Commercial and industrial
Loans
Total loans	4,668		4,668		4,766
In U.S. offices | Consumer | Lease financing
Loans
Total loans					1
In offices outside the U.S. | Consumer
Loans
Total loans	147,374		147,374		146,277
In offices outside the U.S. | Consumer | Mortgage and real estate
Loans
Total loans	53,058		53,058		52,052
In offices outside the U.S. | Consumer | Installment, revolving credit and other
Loans
Total loans	35,108		35,108		34,613
In offices outside the U.S. | Consumer | Credit cards
Loans
Total loans	38,721		38,721		38,926
In offices outside the U.S. | Consumer | Commercial and industrial
Loans
Total loans	19,768		19,768		19,975
In offices outside the U.S. | Consumer | Lease financing
Loans
Total loans	$ 719		$ 719		$ 711