CONDENSED CONSOLIDATING BALANCE SHEET (Details 2) (USD $) In Millions	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2009
Assets
Cash and due from banks	$ 28,950		$ 27,972	$ 26,342		$ 25,472
Federal funds sold and resale agreements	290,645		246,717
Trading account assets	320,637		317,272
Investments	286,657		318,164
Loans, net of unearned income	637,239		648,794
Allowance for loan losses	(32,052)	(34,362)	(40,655)	(43,674)	(46,197)	(36,033)
Total loans, net	605,187		608,139
Other assets	403,916		395,638
Total assets	1,935,992		1,913,902
Liabilities and equity
Deposits	851,281		844,968
Federal funds purchased and securities loaned or sold	223,612		189,558
Trading account liabilities	148,851		129,054
Short-term borrowings	65,818		78,790
Long-term debt	333,824		381,183
Other liabilities	133,264		124,560
Total liabilities	1,756,650		1,748,113
Citigroup stockholders' equity	177,372		163,468
Noncontrolling interests	1,970		2,321
Total equity	179,342		165,789	165,183
Total liabilities and equity	1,935,992		1,913,902
Citigroup Parent Company
Assets
Cash and due from banks-intercompany	2		11
Trading account assets	13		15
Trading account assets-intercompany	74		55
Investments	30,551		21,982
Advances to subsidiaries	103,880		133,320
Investments in subsidiaries	204,738		205,043
Other assets	21,195		19,572
Other assets-intercompany	39,008		10,609
Total assets	399,461		390,607
Liabilities and equity
Federal funds purchased and securities loaned or sold-intercompany	185		185
Trading account liabilities-intercompany	73		55
Short-term borrowings	13		16
Long-term debt	185,953		191,944
Long-term debt-intercompany	13		389
Advances from subsidiaries	19,723		22,698
Other liabilities	6,412		5,841
Other liabilities-intercompany	9,717		6,011
Total liabilities	222,089		227,139
Citigroup stockholders' equity	177,372		163,468
Total equity	177,372		163,468
Total liabilities and equity	399,461		390,607
Citigroup Global Markets Holdings Inc. (CGMHI)
Assets
Cash and due from banks	2,886		2,553
Cash and due from banks-intercompany	2,501		2,667
Federal funds sold and resale agreements	229,221		191,963
Federal funds sold and resale agreements-intercompany	19,667		14,530
Trading account assets	136,065		135,224
Trading account assets-intercompany	10,722		11,195
Investments	145		263
Loans, net of unearned income	183		216
Allowance for loan losses	(49)		(46)
Total loans, net	134		170
Other assets	73,134		66,467
Other assets-intercompany	35,934		46,856
Total assets	510,409		471,888
Liabilities and equity
Federal funds purchased and securities loaned or sold	174,284		156,312
Federal funds purchased and securities loaned or sold-intercompany	27,224		7,537
Trading account liabilities	95,659		75,454
Trading account liabilities-intercompany	9,535		10,265
Short-term borrowings	2,713		2,296
Short-term borrowings-intercompany	40,473		66,838
Long-term debt	6,931		9,566
Long-term debt-intercompany	64,790		60,088
Other liabilities	61,444		58,056
Other liabilities-intercompany	12,312		9,883
Total liabilities	495,365		456,295
Citigroup stockholders' equity	14,579		15,178
Noncontrolling interests	465		415
Total equity	15,044		15,593
Total liabilities and equity	510,409		471,888
Citigroup Funding Inc. (CFI)
Assets
Trading account assets			60
Trading account assets-intercompany	140		426
Loans, net of unearned income-intercompany	64,422		95,507
Total loans, net	64,422		95,507
Other assets	369		561
Other assets-intercompany	2,192		2,549
Total assets	67,123		99,103
Liabilities and equity
Trading account liabilities	21		45
Trading account liabilities-intercompany	310		88
Short-term borrowings	10,060		11,024
Short-term borrowings-intercompany	5,189		33,941
Long-term debt	46,752		50,629
Long-term debt-intercompany	1,948		1,705
Other liabilities	730		175
Other liabilities-intercompany	295		277
Total liabilities	65,305		97,884
Citigroup stockholders' equity	1,818		1,219
Total equity	1,818		1,219
Total liabilities and equity	67,123		99,103
CitiFinancial Credit Company (CCC)
Assets
Cash and due from banks	274		170
Cash and due from banks-intercompany	179		153
Investments	2,110		2,008
Loans, net of unearned income	28,905		32,948
Loans, net of unearned income-intercompany	4,112		3,723
Allowance for loan losses	(2,648)		(3,181)
Total loans, net	30,369		33,490
Other assets	4,567		4,318
Other assets-intercompany	1
Total assets	37,500		40,139
Liabilities and equity
Short-term borrowings	750		750
Short-term borrowings-intercompany	10,627		4,208
Long-term debt	2,742		3,396
Long-term debt-intercompany	18,325		26,339
Other liabilities	1,791		1,922
Other liabilities-intercompany	384		668
Total liabilities	34,619		37,283
Citigroup stockholders' equity	2,881		2,856
Total equity	2,881		2,856
Total liabilities and equity	37,500		40,139
Associates
Assets
Cash and due from banks	382		221
Cash and due from banks-intercompany	191		177
Trading account assets	13		9
Investments	2,187		2,093
Loans, net of unearned income	32,604		37,803
Loans, net of unearned income-intercompany	8,968		6,517
Allowance for loan losses	(2,887)		(3,467)
Total loans, net	38,685		40,853
Other assets	7,621		8,311
Other assets-intercompany	1,865		1,917
Total assets	50,944		53,581
Liabilities and equity
Short-term borrowings	1,499		1,491
Short-term borrowings-intercompany	5,190		2,797
Long-term debt	5,639		6,603
Long-term debt-intercompany	29,695		33,224
Other liabilities	2,221		3,104
Other liabilities-intercompany	360		295
Total liabilities	44,604		47,514
Citigroup stockholders' equity	6,340		6,067
Total equity	6,340		6,067
Total liabilities and equity	50,944		53,581
Other Citigroup Subsidiaries, eliminations and income from discontinued operations
Assets
Cash and due from banks	25,682		25,198
Cash and due from banks-intercompany	(2,694)		(2,855)
Federal funds sold and resale agreements	61,424		54,754
Federal funds sold and resale agreements-intercompany	(19,667)		(14,530)
Trading account assets	184,546		181,964
Trading account assets-intercompany	(10,936)		(11,676)
Investments	253,774		293,826
Loans, net of unearned income	604,452		610,775
Loans, net of unearned income-intercompany	(73,390)		(102,024)
Allowance for loan losses	(29,116)		(37,142)
Total loans, net	501,946		471,609
Advances to subsidiaries	(103,880)		(133,320)
Other assets	301,597		300,727
Other assets-intercompany	(78,999)		(61,931)
Total assets	1,112,793		1,103,766
Liabilities and equity
Deposits	851,281		844,968
Federal funds purchased and securities loaned or sold	49,328		33,246
Federal funds purchased and securities loaned or sold-intercompany	(27,409)		(7,722)
Trading account liabilities	53,171		53,555
Trading account liabilities-intercompany	(9,918)		(10,408)
Short-term borrowings	51,533		63,963
Short-term borrowings-intercompany	(50,852)		(103,576)
Long-term debt	88,549		122,441
Long-term debt-intercompany	(96,446)		(95,406)
Advances from subsidiaries	(19,723)		(22,698)
Other liabilities	62,457		57,384
Other liabilities-intercompany	(22,684)		(16,466)
Total liabilities	929,287		919,281
Citigroup stockholders' equity	182,001		182,579
Noncontrolling interests	1,505		1,906
Total equity	183,506		184,485
Total liabilities and equity	1,112,793		1,103,766
Consolidating adjustments
Assets
Cash and due from banks	(274)		(170)
Cash and due from banks-intercompany	(179)		(153)
Investments	(2,110)		(2,008)
Loans, net of unearned income	(28,905)		(32,948)
Loans, net of unearned income-intercompany	(4,112)		(3,723)
Allowance for loan losses	2,648		3,181
Total loans, net	(30,369)		(33,490)
Investments in subsidiaries	(204,738)		(205,043)
Other assets	(4,567)		(4,318)
Other assets-intercompany	(1)
Total assets	(242,238)		(245,182)
Liabilities and equity
Short-term borrowings	(750)		(750)
Short-term borrowings-intercompany	(10,627)		(4,208)
Long-term debt	(2,742)		(3,396)
Long-term debt-intercompany	(18,325)		(26,339)
Other liabilities	(1,791)		(1,922)
Other liabilities-intercompany	(384)		(668)
Total liabilities	(34,619)		(37,283)
Citigroup stockholders' equity	(207,619)		(207,899)
Total equity	(207,619)		(207,899)
Total liabilities and equity	$ (242,238)		$ (245,182)