CONDENSED CONSOLIDATING FINANCIAL STATEMENTS SCHEDULES (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks (including segregated cash and other deposits)	$ 26,505	$ 28,701	$ 27,842	$ 27,972
Federal funds sold and resale agreements	289,057	275,849
Trading account assets	307,050	291,734
Investments	297,323	293,413
Loans, net of unearned income	648,022	647,242
Allowance for loan losses	(29,020)	(30,115)	(36,568)	(40,655)
Total loans, net	619,002	617,127
Other assets	405,486	367,054
Total assets	1,944,423	1,873,878
Liabilities and equity
Deposits	906,012	865,936
Federal funds purchased and securities loaned or sold	226,008	198,373
Trading account liabilities	135,956	126,082
Short-term borrowings	55,611	54,441
Long-term debt	311,079	323,505
Other liabilities	126,034	125,968
Total liabilities	1,760,700	1,694,305
Citigroup stockholders' equity	181,820	177,806
Noncontrolling interests	1,903	1,767
Total equity	183,723	179,573	173,393
Total liabilities and equity	1,944,423	1,873,878
Citigroup Parent Company
Assets
Cash and due from banks-intercompany	512	3
Trading account assets		7
Trading account assets-intercompany	78	92
Investments	37,239	37,477
Advances to subsidiaries	104,029	108,644
Investments in subsidiaries	198,973	194,979
Other assets	21,456	35,776
Other assets-intercompany	25,040	29,935
Total assets	387,327	406,913
Liabilities and equity
Federal funds purchased and securities loaned or sold-intercompany	185	185
Trading account liabilities-intercompany	76	96
Short-term borrowings	13	13
Long-term debt	176,080	181,702
Long-term debt-intercompany	8	19
Advances from subsidiaries	14,559	17,027
Other liabilities	5,975	19,625
Other liabilities-intercompany	8,611	10,440
Total liabilities	205,507	229,107
Citigroup stockholders' equity	181,820	177,806
Total equity	181,820	177,806
Total liabilities and equity	387,327	406,913
Citigroup Global Markets Holdings Inc. (CGMHI)
Assets
Cash and due from banks (including segregated cash and other deposits)	1,399	1,237
Cash and due from banks-intercompany	3,129	2,963
Federal funds sold and resale agreements	221,801	209,618
Federal funds sold and resale agreements-intercompany	11,405	10,981
Trading account assets	135,022	123,017
Trading account assets-intercompany	7,781	9,319
Investments	86	110
Loans, net of unearned income	210	205
Allowance for loan losses	(53)	(47)
Total loans, net	157	158
Other assets	57,571	49,207
Other assets-intercompany	39,406	42,974
Total assets	477,757	449,584
Liabilities and equity
Federal funds purchased and securities loaned or sold	177,067	149,725
Federal funds purchased and securities loaned or sold-intercompany	18,564	25,902
Trading account liabilities	89,413	72,493
Trading account liabilities-intercompany	7,636	8,530
Short-term borrowings	1,703	1,229
Short-term borrowings-intercompany	44,461	43,056
Long-term debt	6,098	6,884
Long-term debt-intercompany	59,340	59,958
Other liabilities	59,801	63,012
Other liabilities-intercompany	5,393	10,575
Total liabilities	469,476	441,364
Citigroup stockholders' equity	7,873	7,825
Noncontrolling interests	408	395
Total equity	8,281	8,220
Total liabilities and equity	477,757	449,584
Citigroup Funding Inc. (CFI)
Assets
Trading account assets	29	18
Trading account assets-intercompany	254	269
Loans, net of unearned income-intercompany	57,437	58,039
Total loans, net	57,437	58,039
Other assets	240	367
Other assets-intercompany	142	3,257
Total assets	58,102	61,950
Liabilities and equity
Trading account liabilities	1	298
Trading account liabilities-intercompany	89	90
Short-term borrowings	6,956	7,133
Short-term borrowings-intercompany	2,209	3,153
Long-term debt	43,565	45,081
Long-term debt-intercompany	3,153	2,971
Other liabilities	496	889
Other liabilities-intercompany	119	352
Total liabilities	56,588	59,967
Citigroup stockholders' equity	1,514	1,983
Total equity	1,514	1,983
Total liabilities and equity	58,102	61,950
CitiFinancial Credit Company (CCC)
Assets
Cash and due from banks (including segregated cash and other deposits)	215	211
Cash and due from banks-intercompany	121	161
Investments	1,864	2,177
Loans, net of unearned income	23,995	24,899
Loans, net of unearned income-intercompany	5,025	4,916
Allowance for loan losses	(2,302)	(2,299)
Total loans, net	26,718	27,516
Other assets	3,977	4,000
Other assets-intercompany	128	4
Total assets	33,023	34,069
Liabilities and equity
Short-term borrowings		750
Short-term borrowings-intercompany	8,644	10,243
Long-term debt	3,492	2,742
Long-term debt-intercompany	15,840	14,919
Other liabilities	1,315	1,453
Other liabilities-intercompany	82	199
Total liabilities	29,373	30,306
Citigroup stockholders' equity	3,650	3,763
Total equity	3,650	3,763
Total liabilities and equity	33,023	34,069
Associates
Assets
Cash and due from banks (including segregated cash and other deposits)	256	254
Cash and due from banks-intercompany	136	175
Trading account assets	13	12
Investments	1,938	2,250
Loans, net of unearned income	27,531	28,556
Loans, net of unearned income-intercompany	10,281	8,585
Allowance for loan losses	(2,528)	(2,547)
Total loans, net	35,284	34,594
Other assets	7,179	7,132
Other assets-intercompany	2,481	2,366
Total assets	47,287	46,783
Liabilities and equity
Short-term borrowings	289	1,100
Short-term borrowings-intercompany	9,872	10,792
Long-term debt	6,456	5,680
Long-term debt-intercompany	22,196	20,692
Other liabilities	2,466	2,483
Other liabilities-intercompany	55	52
Total liabilities	41,334	40,799
Citigroup stockholders' equity	5,953	5,984
Total equity	5,953	5,984
Total liabilities and equity	47,287	46,783
Other Citigroup Subsidiaries and eliminations
Assets
Cash and due from banks (including segregated cash and other deposits)	24,850	27,210
Cash and due from banks-intercompany	(3,777)	(3,141)
Federal funds sold and resale agreements	67,256	66,231
Federal funds sold and resale agreements-intercompany	(11,405)	(10,981)
Trading account assets	171,986	168,680
Trading account assets-intercompany	(8,113)	(9,680)
Investments	258,060	253,576
Loans, net of unearned income	620,281	618,481
Loans, net of unearned income-intercompany	(67,718)	(66,624)
Allowance for loan losses	(26,439)	(27,521)
Total loans, net	526,124	524,336
Advances to subsidiaries	(104,029)	(108,644)
Other assets	319,040	274,572
Other assets-intercompany	(67,069)	(78,532)
Total assets	1,172,923	1,103,627
Liabilities and equity
Deposits	906,012	865,936
Federal funds purchased and securities loaned or sold	48,941	48,648
Federal funds purchased and securities loaned or sold-intercompany	(18,749)	(26,087)
Trading account liabilities	46,542	53,291
Trading account liabilities-intercompany	(7,801)	(8,716)
Short-term borrowings	46,650	44,966
Short-term borrowings-intercompany	(56,542)	(57,001)
Long-term debt	78,880	84,158
Long-term debt-intercompany	(84,697)	(83,640)
Advances from subsidiaries	(14,559)	(17,027)
Other liabilities	57,296	39,959
Other liabilities-intercompany	(14,178)	(21,419)
Total liabilities	987,795	923,068
Citigroup stockholders' equity	183,633	179,187
Noncontrolling interests	1,495	1,372
Total equity	185,128	180,559
Total liabilities and equity	1,172,923	1,103,627
Consolidating adjustments
Assets
Cash and due from banks (including segregated cash and other deposits)	(215)	(211)
Cash and due from banks-intercompany	(121)	(161)
Investments	(1,864)	(2,177)
Loans, net of unearned income	(23,995)	(24,899)
Loans, net of unearned income-intercompany	(5,025)	(4,916)
Allowance for loan losses	2,302	2,299
Total loans, net	(26,718)	(27,516)
Investments in subsidiaries	(198,973)	(194,979)
Other assets	(3,977)	(4,000)
Other assets-intercompany	(128)	(4)
Total assets	(231,996)	(229,048)
Liabilities and equity
Short-term borrowings		(750)
Short-term borrowings-intercompany	(8,644)	(10,243)
Long-term debt	(3,492)	(2,742)
Long-term debt-intercompany	(15,840)	(14,919)
Other liabilities	(1,315)	(1,453)
Other liabilities-intercompany	(82)	(199)
Total liabilities	(29,373)	(30,306)
Citigroup stockholders' equity	(202,623)	(198,742)
Total equity	(202,623)	(198,742)
Total liabilities and equity	$ (231,996)	$ (229,048)