CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified		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, 2010				$ 312		$ 101,316	$ 79,559	$ (1,442)	$ (16,277)	$ 2,321
Treasury stock balance (in shares), beginning of year at Dec. 31, 2010								(16,566,000)
Shares issued balance (in shares), beginning of year at Dec. 31, 2010				12,000		2,922,402,000
Increase (Decrease) in Stockholders' Equity
Adjusted balance, beginning of period							79,559
Citigroup's net income		11,067					11,067
Employee benefit plans						766
Employee benefit plans (in shares)						3,540,000
ADIA Upper DECs equity units purchase contract						3,750
ADIA Upper DECs equity units purchase contract (in shares)						11,781,000
Common dividends	[1]						(81)
Preferred dividends		(26)					(26)
Issuance of shares pursuant to employee benefit plans								372
Issuance of shares pursuant to employee benefit plans (in shares)								2,714,000
Treasury stock acquired	[2]							(1)
Treasury stock acquired (in shares)	[2]							(26,000)
Initial origination of a noncontrolling interest										28
Transactions between Citigroup and the noncontrolling-interest shareholders										(274)
Net income attributable to noncontrolling-interest shareholders		(148)								148
Dividends paid to noncontrolling-interest shareholders										(67)
Other						1	1			(297)
Other (in shares)						33,000
Net change in Accumulated other comprehensive income (loss)		(1,511)							(1,511)
Total other comprehensive income (loss) attributable to noncontrolling interests		(92)								(92)
Net change in noncontrolling interests										(554)
Balance, end of period at Dec. 31, 2011		179,573	177,806	312	177,494	105,833	90,520	(1,071)	(17,788)	1,767
Shares outstanding balance (in shares), end of year at Dec. 31, 2011					2,923,878,000
Treasury stock balance (in shares), end of year at Dec. 31, 2011								(13,878,000)
Shares issued balance (in shares), end of year at Dec. 31, 2011				12,000		2,937,756,000
Increase (Decrease) in Stockholders' Equity
Adjustment to opening balance, net of taxes	[3]						(107)
Adjusted balance, beginning of period							90,413
Issuance of new preferred stock				2,250
Issuance of new preferred stock (in shares)				90,000
Citigroup's net income		7,541					7,541
Employee benefit plans						597
Employee benefit plans (in shares)						9,037,000
Issuance of shares and T-DECs for TARP repayment (in shares)						96,338,000
Common dividends	[1]						(120)
Preferred dividends		(26)					(26)
Issuance of shares pursuant to employee benefit plans								229
Issuance of shares pursuant to employee benefit plans (in shares)								(253,000)
Treasury stock acquired	[2]							(5)
Treasury stock acquired (in shares)	[2]							(138,000)
Initial origination of a noncontrolling interest										88
Transactions between Citigroup and the noncontrolling-interest shareholders										41
Net income attributable to noncontrolling-interest shareholders		(219)								219
Dividends paid to noncontrolling-interest shareholders										(33)
Other						(9)	1			(224)
Other (in shares)						22,000
Net change in Accumulated other comprehensive income (loss)		892							892
Total other comprehensive income (loss) attributable to noncontrolling interests		90								90
Net change in noncontrolling interests										181
Balance, end of period at Dec. 31, 2012		190,997	189,049	2,562	186,487	106,421	97,809	(847)	(16,896)	1,948
Shares outstanding balance (in shares), end of year at Dec. 31, 2012					3,028,884,000
Treasury stock balance (in shares), end of year at Dec. 31, 2012		(14,269,301)						(14,269,000)
Shares issued balance (in shares), end of year at Dec. 31, 2012				102,000		3,043,153,000
Increase (Decrease) in Stockholders' Equity
Adjusted balance, beginning of period							97,809
Issuance of new preferred stock				4,270
Issuance of new preferred stock (in shares)				171,000
Redemption of preferred stock				(94)
Redemption of preferred stock (in shares)				(3,000)
Citigroup's net income		13,673					13,673
Employee benefit plans						878
Employee benefit plans (in shares)						18,930,000
Preferred stock issuance expense						(78)
Common dividends	[1]						(120)
Preferred dividends		(194)					(194)
Issuance of shares pursuant to employee benefit plans								26
Issuance of shares pursuant to employee benefit plans (in shares)								(1,629,000)
Treasury stock acquired	[2]							(837)
Treasury stock acquired (in shares)	[2]							(16,958,000)
Initial origination of a noncontrolling interest										6
Transactions between noncontrolling-interest shareholders and the related consolidated subsidiary										(2)
Transactions between Citigroup and the noncontrolling-interest shareholders										(118)
Net income attributable to noncontrolling-interest shareholders		(227)								227
Dividends paid to noncontrolling-interest shareholders										(63)
Other						3				(187)
Other (in shares)						16,000
Net change in Accumulated other comprehensive income (loss)		(2,237)							(2,237)
Total other comprehensive income (loss) attributable to noncontrolling interests		(17)								(17)
Net change in noncontrolling interests										(154)
Balance, end of period at Dec. 31, 2013		$ 206,133	$ 204,339	$ 6,738	$ 197,601	$ 107,224	$ 111,168	$ (1,658)	$ (19,133)	$ 1,794
Shares outstanding balance (in shares), end of year at Dec. 31, 2013					3,029,243,000
Treasury stock balance (in shares), end of year at Dec. 31, 2013		(32,856,062)						(32,856,000)
Shares issued balance (in shares), end of year at Dec. 31, 2013				270,000		3,062,099,000

[1] Common dividends declared were $0.01 per share in each of the first, second, third and fourth quarters of 2013, first, second, third and fourth quarters of 2012, and second, third and fourth quarters of 2011.

[2] For 2013, primarily consists of open market purchases under Citi's Board of Directors-approved common stock repurchase program. 2013 and other periods also include treasury stock related to (i) 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] The adjustment to the opening balance for Retained earnings in 2012 represents the cumulative effect of adopting ASU 2010-26, Financial Services-Insurance (Topic 944): Accounting for Costs Associated with Acquiring or Renewing Insurance Contracts. See Note 1 to the Consolidated Financial Statements.