CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income before attribution of noncontrolling interests	$ 4,218		$ 2,986		$ 8,116		$ 6,043
Citigroup's other comprehensive income (loss)
Net change in unrealized gains and losses on investment securities, net of taxes	(2,056)		564		(1,887)		(210)
Net change in cash flow hedges, net of taxes	497		(89)		622		131
Pension liability adjustment, net of taxes	401	[1]	107	[1]	655	[1]	17	[1]
Net change in foreign currency translation adjustment, net of taxes and hedges	(1,707)		(1,596)		(2,418)		101
Citigroup's total other comprehensive income (loss)	(2,865)		(1,014)		(3,028)		39
Other comprehensive income (loss) attributable to noncontrolling interests
Net change in unrealized gains and losses on investment securities, net of taxes	(10)				(26)		9
Net change in foreign currency translation adjustment, net of taxes	(14)		(53)		(49)		2
Total other comprehensive income (loss) attributable to noncontrolling interests	(24)		(53)		(75)		11
Total comprehensive income before attribution of noncontrolling interests	1,329		1,919		5,013		6,093
Total comprehensive income attributable to noncontrolling interests	12		(13)		51		177
Citigroup's comprehensive income	$ 1,317		$ 1,932		$ 4,962		$ 5,916

[1] Primarily reflects adjustments based on the periodic actuarial valuations of the Company's pension and postretirement plans and amortization of amounts previously recognized in Other comprehensive income.