CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income before attribution of noncontrolling interests		$ 4,864	$ 231	$ 9,676	$ 4,220
Add: Citigroup’s other comprehensive income (loss)
Net change in unrealized gains and losses on investment securities, net of taxes		(935)	1,006	(344)	1,434
Net change in cash flow hedges, net of taxes		92	120	178	238
Benefit plans liability adjustment, net of taxes	[1]	578	(144)	488	(177)
Net change in foreign currency translation adjustment, net of taxes and hedges		(148)	17	(2,210)	(509)
Citigroup’s total other comprehensive income (loss)		(413)	999	(1,888)	986
Total comprehensive income before attribution of noncontrolling interests		4,451	1,230	7,788	5,206
Less: Net income attributable to noncontrolling interests		18	50	60	95
Citigroup’s comprehensive income		$ 4,433	$ 1,180	$ 7,728	$ 5,111

[1] Reflects adjustments based on the actuarial valuations of the Company’s significant pension and postretirement plans, including changes in the mortality assumptions at June 30, 2015, and amortization of amounts previously recognized in Accumulated other comprehensive income (loss). See Note 8 to the Consolidated Financial Statements.