CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Net income before attribution of noncontrolling interests	$ 493		$ 3,743		$ 6,536		$ 10,217
Citigroup's other comprehensive income (loss)
Net change in unrealized gains and losses on investment securities, net of taxes	776		505		566		2,297
Net change in cash flow hedges, net of taxes	186		(532)		317		(449)
Net change in foreign currency translation adjustment, net of taxes and hedges	1,245		(4,935)		1,346		(2,795)
Pension liability adjustment, net of taxes	(24)	[1]	140	[1]	(7)	[1]	180	[1]
Citigroup's total other comprehensive income (loss)	2,183		(4,822)		2,222		(767)
Other comprehensive income (loss) attributable to noncontrolling interests
Net change in unrealized gains and losses on investment securities, net of taxes	9		(5)		18		(2)
Net change in foreign currency translation adjustment, net of taxes	39		(110)		41		(60)
Total other comprehensive income (loss) attributable to noncontrolling interests	48		(115)		59		(62)
Total comprehensive income (loss) before attribution of noncontrolling interests	2,724		(1,194)		8,817		9,388
Total comprehensive income (loss) attributable to noncontrolling interests	73		(143)		250		44
Citigroup's comprehensive income (loss)	$ 2,651		$ (1,051)		$ 8,567		$ 9,344

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