CONTINGENCIES (Details) (USD $)			3 Months Ended	0 Months Ended		3 Months Ended		12 Months Ended	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Residential Mortgage-Backed Securities Investor Actions and Repurchase Claims In Re Citigroup Inc. Securities Litigation	Apr. 07, 2014 Residential Mortgage-Backed Securities Investor Actions and Repurchase Claims In Re Citigroup Inc. Securities Litigation Subsequent event item	Feb. 28, 2014 Fraud litigation Pemex	Mar. 31, 2014 Fraud litigation Pemex	Dec. 31, 2013 Fraud litigation Pemex	Dec. 31, 2013 Fraud litigation OSA	Mar. 31, 2014 KIKOs CKI item
CONTINGENCIES
Possible loss, high end of the range	$ 5,000,000,000	$ 5,000,000,000
Contingencies
Aggregate original purchase amount			7,200,000,000
Aggregate original purchase amount of the purchases covered by tolling agreements			1,400,000,000
Number of institutional investors				18
Number of entity sponsored mortgage securitization trusts				68
Amount of binding offer				1,125,000,000
Debt securities and preferred stock issued				59,400,000,000
Number of civil lawsuits filed by small and medium-sized enterprises									103
Number of decision rendered at district court level									90
Decisions favorable to entity									70
Number of decisions awarded to plaintiff for portion of damages sought									20
Contingent loss as claimed against the company									36,800,000
Number of adverse decision against which appeal is made									20
Number of decisions appealed at the high court									64
Number of cases decided at the high court									60
Number of decisions favorable to the entity in the high court									44
Number of decisions awarded by the high court to the plaintiff for a portion of damages sought									16
Decrease in damages awarded									10,600,000
Number of decisions appealed at the Supreme court									9
Number of decisions rendered at the Supreme Court									11
Number of decisions rendered in favour of plaintiff at the Supreme Court									9
Number of decisions awarded by the Supreme Court to the plaintiff for a partial damages sought									2
Decrease in damages awarded by Supreme Court									300,000
Damages awarded									25,900,000
After-tax charge resulting from a fraud discovered					235,000,000
Pretax charge resulting from a fraud discovered					360,000,000
Incremental credit cost						165,000,000
Amount of credit cost direct exposure to oil service company								33,000,000
Contingent loss on account receivable							$ 113,000,000