ALLOWANCE FOR CREDIT LOSSES (Details 2) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Allowance for loan losses disclosures
Other, net	$ (845)	$ (530)	$ (1,802)	$ 11,091
U.S. loan portfolios
Allowance for loan losses disclosures
Other, net			1,200
Egg Banking PLC
Allowance for loan losses disclosures
Other, net			240
Adoption of SFAS 167
Allowance for loan losses disclosures
Other, net				(13,400)
U.S. Real Estate Lending Loans
Allowance for loan losses disclosures
Other, net				1,800
U.K. real estate lending loans
Allowance for loan losses disclosures
Other, net				290
Canada Cards portfolio
Allowance for loan losses disclosures
Other, net				107
Auto portfolio
Allowance for loan losses disclosures
Other, net				$ 130