CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions		Total	Citigroup stockholders' equity	Preferred stock at aggregate liquidation value	Citigroup common stockholders' equity	Common stock and additional paid-in capital	Retained earnings	Treasury stock, at cost		Citigroup's accumulated other comprehensive income (loss)	Noncontrolling interests
Balance, beginning of year at Dec. 31, 2013				$ 6,738		$ 107,224	$ 111,168	$ (1,658)		$ (19,133)	$ 1,794
Adjustment to opening balance, net of taxes at Dec. 31, 2013	[1]						(347)
Adjusted balance, beginning of year at Dec. 31, 2013							110,821
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				2,230
Employee benefit plans						492		(196)	[2]
Preferred stock issuance expense						(24)
Common dividends	[3]						(60)
Preferred dividends		$ (224)					(224)
Tax benefit							353
Treasury stock acquired	[4]							(666)
Transactions between Citigroup and the noncontrolling-interest shareholders											(68)
Net income		4,220					4,125				95
Dividends paid to noncontrolling-interest shareholders											(17)
Other comprehensive income (loss)										986	(2)
Other						8					(65)
Net change in noncontrolling interests											(57)
Balance, end of year at Jun. 30, 2014		212,753	$ 211,016	8,968	$ 202,048	107,700	115,015	(2,520)		(18,147)	1,737
Balance, beginning of year at Dec. 31, 2014		211,696		10,468		108,010	117,852	(2,929)		(23,216)	1,511
Adjustment to opening balance, net of taxes at Dec. 31, 2014	[1]						0
Adjusted balance, beginning of year at Dec. 31, 2014							117,852
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				3,500
Employee benefit plans						279		151	[2]
Preferred stock issuance expense						(14)
Common dividends	[3]						(184)
Preferred dividends		(330)					(330)
Tax benefit							0
Treasury stock acquired	[4]							(1,850)
Transactions between Citigroup and the noncontrolling-interest shareholders											(114)
Net income		9,676					9,616				60
Dividends paid to noncontrolling-interest shareholders											(10)
Other comprehensive income (loss)										(1,888)	(61)
Other						(25)					(1)
Net change in noncontrolling interests											(126)
Balance, end of year at Jun. 30, 2015		$ 220,825	$ 219,440	$ 13,968	$ 205,472	$ 108,250	$ 126,954	$ (4,628)		$ (25,104)	$ 1,385

[1] Citi adopted ASU 2014-01 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Affordable Housing, in the first quarter of 2015 on a retrospective basis. This adjustment to opening Retained earnings represents the impact to periods prior to January 1, 2014 and is shown as an adjustment to the opening balance since the second quarter of 2014 is the earliest period disclosed in this Form 10-Q. See Note 1 to the Consolidated Financial Statements for additional information.

[2] Includes treasury stock related to (i) certain activity on employee stock option program exercises where the employee delivers existing shares to cover the option exercise, or (ii) under Citi’s employee restricted or deferred stock programs where shares are withheld to satisfy tax requirements.

[3] Common dividends declared were $0.01 per share in the first quarter and $0.05 in the second quarter of 2015 and $0.01 per share in the first and second quarter of 2014 .

[4] For the six months ended June 30, 2015 and 2014, primarily consists of open market purchases under Citi’s Board of Directors-approved common stock repurchase program.