CONDENSED CONSOLIDATING BALANCE SHEET (Details 2) (USD $) In Millions	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009
Assets
Cash and due from banks	$ 27,766		$ 27,972	$ 24,709		$ 25,472
Federal funds sold and resale agreements	283,976		246,717
Trading account assets	322,349		317,272
Investments	309,574		318,164
Loans, net of unearned income	647,500		648,794
Allowance for loan losses	(34,362)	(36,568)	(40,655)	(46,197)	(48,746)	(36,033)
Total loans, net	613,138		608,139
Other assets	399,823		395,638
Total assets	1,956,626		1,913,902
Liabilities and equity
Deposits	866,310		844,968
Federal funds purchased and securities loaned or sold	203,843		189,558
Trading account liabilities	152,307		129,054
Short-term borrowings	72,889		78,790
Long-term debt	352,458		381,183
Other liabilities	130,174		124,560
Total liabilities	1,777,981		1,748,113
Citigroup stockholders' equity	176,364		163,468
Noncontrolling interests	2,281		2,321
Total equity	178,645		165,789	157,330
Total liabilities and equity	1,956,626		1,913,902
Citigroup Parent Company
Assets
Cash and due from banks-intercompany	95		11
Federal funds sold and resale agreements-intercompany	18,000
Trading account assets	12		15
Trading account assets-intercompany	24		55
Investments	18,142		21,982
Advances to subsidiaries	109,737		133,320
Investments in subsidiaries	209,091		205,043
Other assets	20,075		19,572
Other assets-intercompany	18,536		10,609
Total assets	393,712		390,607
Liabilities and equity
Federal funds purchased and securities loaned or sold-intercompany	185		185
Trading account liabilities-intercompany	24		55
Short-term borrowings	16		16
Long-term debt	185,846		191,944
Long-term debt-intercompany	25		389
Advances from subsidiaries	19,378		22,698
Other liabilities	6,175		5,841
Other liabilities-intercompany	5,700		6,011
Total liabilities	217,349		227,139
Citigroup stockholders' equity	176,363		163,468
Total equity	176,363		163,468
Total liabilities and equity	393,712		390,607
Citigroup Global Markets Holdings Inc. (CGMHI)
Assets
Cash and due from banks	3,007		2,553
Cash and due from banks-intercompany	2,929		2,667
Federal funds sold and resale agreements	222,473		191,963
Federal funds sold and resale agreements-intercompany	20,005		14,530
Trading account assets	149,026		135,224
Trading account assets-intercompany	10,616		11,195
Investments	168		263
Loans, net of unearned income	199		216
Allowance for loan losses	(54)		(46)
Total loans, net	145		170
Other assets	75,007		66,467
Other assets-intercompany	34,637		46,856
Total assets	518,013		471,888
Liabilities and equity
Federal funds purchased and securities loaned or sold	165,425		156,312
Federal funds purchased and securities loaned or sold-intercompany	29,671		7,537
Trading account liabilities	100,510		75,454
Trading account liabilities-intercompany	9,491		10,265
Short-term borrowings	2,556		2,296
Short-term borrowings-intercompany	41,005		66,838
Long-term debt	8,605		9,566
Long-term debt-intercompany	66,474		60,088
Other liabilities	62,299		58,056
Other liabilities-intercompany	16,417		9,883
Total liabilities	502,453		456,295
Citigroup stockholders' equity	15,094		15,178
Noncontrolling interests	466		415
Total equity	15,560		15,593
Total liabilities and equity	518,013		471,888
Citigroup Funding Inc. (CFI)
Assets
Cash and due from banks-intercompany	72
Trading account assets	54		60
Trading account assets-intercompany	70		426
Loans, net of unearned income-intercompany	63,913		95,507
Total loans, net	63,913		95,507
Other assets	330		561
Other assets-intercompany	2,189		2,549
Total assets	66,628		99,103
Liabilities and equity
Trading account liabilities	52		45
Trading account liabilities-intercompany	40		88
Short-term borrowings	10,133		11,024
Short-term borrowings-intercompany	5,246		33,941
Long-term debt	47,586		50,629
Long-term debt-intercompany	1,857		1,705
Other liabilities	208		175
Other liabilities-intercompany	273		277
Total liabilities	65,395		97,884
Citigroup stockholders' equity	1,233		1,219
Total equity	1,233		1,219
Total liabilities and equity	66,628		99,103
CitiFinancial Credit Company (CCC)
Assets
Cash and due from banks	343		170
Cash and due from banks-intercompany	167		153
Investments	2,086		2,008
Loans, net of unearned income	30,051		32,948
Loans, net of unearned income-intercompany	3,665		3,723
Allowance for loan losses	(2,704)		(3,181)
Total loans, net	31,012		33,490
Other assets	4,057		4,318
Total assets	37,665		40,139
Liabilities and equity
Short-term borrowings	750		750
Short-term borrowings-intercompany	6,451		4,208
Long-term debt	2,742		3,396
Long-term debt-intercompany	22,439		26,339
Other liabilities	1,733		1,922
Other liabilities-intercompany	653		668
Total liabilities	34,768		37,283
Citigroup stockholders' equity	2,897		2,856
Total equity	2,897		2,856
Total liabilities and equity	37,665		40,139
Associates
Assets
Cash and due from banks	464		221
Cash and due from banks-intercompany	180		177
Trading account assets	13		9
Investments	2,165		2,093
Loans, net of unearned income	34,169		37,803
Loans, net of unearned income-intercompany	9,083		6,517
Allowance for loan losses	(2,959)		(3,467)
Total loans, net	40,293		40,853
Other assets	7,171		8,311
Other assets-intercompany	2,763		1,917
Total assets	53,049		53,581
Liabilities and equity
Short-term borrowings	1,504		1,491
Short-term borrowings-intercompany	4,431		2,797
Long-term debt	6,023		6,603
Long-term debt-intercompany	32,324		33,224
Other liabilities	2,173		3,104
Other liabilities-intercompany	216		295
Total liabilities	46,671		47,514
Citigroup stockholders' equity	6,378		6,067
Total equity	6,378		6,067
Total liabilities and equity	53,049		53,581
Other Citigroup Subsidiaries, eliminations
Assets
Cash and due from banks	24,295		25,198
Cash and due from banks-intercompany	(3,276)		(2,855)
Federal funds sold and resale agreements	61,503		54,754
Federal funds sold and resale agreements-intercompany	(38,005)		(14,530)
Trading account assets	173,244		181,964
Trading account assets-intercompany	(10,710)		(11,676)
Investments	289,099		293,826
Loans, net of unearned income	613,132		610,775
Loans, net of unearned income-intercompany	(72,996)		(102,024)
Allowance for loan losses	(31,349)		(37,412)
Total loans, net	508,787		471,609
Advances to subsidiaries	(109,737)		(133,320)
Other assets	297,240		300,727
Other assets-intercompany	(58,125)		(61,931)
Total assets	1,134,315		1,103,766
Liabilities and equity
Deposits	866,310		844,968
Federal funds purchased and securities loaned or sold	38,418		33,246
Federal funds purchased and securities loaned or sold-intercompany	(29,856)		(7,722)
Trading account liabilities	51,745		53,555
Trading account liabilities-intercompany	(9,555)		(10,408)
Short-term borrowings	58,680		63,963
Short-term borrowings-intercompany	(50,682)		(103,576)
Long-term debt	104,398		122,441
Long-term debt-intercompany	(100,680)		(95,406)
Advances from subsidiaries	(19,378)		(22,698)
Other liabilities	59,319		57,384
Other liabilities-intercompany	(22,606)		(16,466)
Total liabilities	946,113		919,281
Citigroup stockholders' equity	186,387		182,579
Noncontrolling interests	1,815		1,906
Total equity	188,202		184,485
Total liabilities and equity	1,134,315		1,103,766
Consolidating adjustments
Assets
Cash and due from banks	(343)		(170)
Cash and due from banks-intercompany	(167)		(153)
Investments	(2,086)		(2,008)
Loans, net of unearned income	(30,051)		(32,948)
Loans, net of unearned income-intercompany	(3,665)		(3,723)
Allowance for loan losses	2,704		3,181
Total loans, net	(31,012)		(33,490)
Investments in subsidiaries	(209,091)		(205,043)
Other assets	(4,057)		(4,318)
Total assets	(246,756)		(245,182)
Liabilities and equity
Short-term borrowings	(750)		(750)
Short-term borrowings-intercompany	(6,451)		(4,208)
Long-term debt	(2,742)		(3,396)
Long-term debt-intercompany	(22,439)		(26,339)
Other liabilities	(1,733)		(1,922)
Other liabilities-intercompany	(653)		(668)
Total liabilities	(34,768)		(37,283)
Citigroup stockholders' equity	(211,988)		(207,899)
Total equity	(211,988)		(207,899)
Total liabilities and equity	$ (246,756)		$ (245,182)