CONSOLIDATED BALANCE SHEET (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks (including segregated cash and other deposits)	$ 26,505	$ 28,701
Deposits with banks	183,949	155,784
Federal funds sold and securities borrowed or purchased under agreements to resell (including $172,435 and $142,862 as of March 31, 2012 and December 31, 2011, respectively, at fair value)	289,057	275,849
Brokerage receivables	39,443	27,777
Trading account assets	307,050	291,734
Investments	297,323	293,413
Loans, net of unearned income
Loans, net of unearned income	648,022	647,242
Allowance for loan losses	(29,020)	(30,115)
Total loans, net	619,002	617,127
Goodwill	25,810	25,413
Intangible assets (other than MSRs)	6,413	6,600
Mortgage servicing rights (MSRs)	2,691	2,569
Other assets	147,180	148,911
Total assets	1,944,423	1,873,878
Liabilities
Non-interest-bearing deposits in U.S. offices	122,305	119,437
Interest-bearing deposits in U.S. offices (including $806 and $848 as of March 31, 2012 and December 31, 2011, respectively, at fair value)	228,357	223,851
Non-interest-bearing deposits in offices outside the U.S.	60,691	57,357
Interest-bearing deposits in offices outside the U.S. (including $521 and $478 as of March 31, 2012 and December 31, 2011, respectively, at fair value)	494,659	465,291
Total deposits	906,012	865,936
Federal funds purchased and securities loaned or sold under agreements to repurchase (including $137,571 and $112,770 as of March 31, 2012 and December 31, 2011, respectively, at fair value)	226,008	198,373
Brokerage payables	56,966	56,696
Trading account liabilities	135,956	126,082
Short-term borrowings	55,611	54,441
Long-term debt	311,079	323,505
Other liabilities	69,068	69,272
Total liabilities	1,760,700	1,694,305
Stockholders' equity
Preferred stock ($1.00 par value; authorized shares: 30 million), issued shares: 12,038 as of March 31, 2012 and December 31, 2011, at aggregate liquidation value	312	312
Common stock ($0.01 par value; authorized shares: 6 billion), issued shares: 2,946,798,740 as of March 31, 2012 and 2,937,755,921 as of December 31, 2011	29	29
Additional paid-in capital	105,787	105,804
Retained earnings	93,310	90,520
Treasury stock, at cost: March 31, 2012-14,641,287 shares and December 31, 2011-13,877,688 shares	(883)	(1,071)
Accumulated other comprehensive income (loss)	(16,735)	(17,788)
Total Citigroup stockholders' equity	181,820	177,806
Noncontrolling interest	1,903	1,767
Total equity	183,723	179,573
Total liabilities and equity	1,944,423	1,873,878
Consumer
Loans, net of unearned income
Loans, net of unearned income	416,103	423,340
Corporate
Loans, net of unearned income
Loans, net of unearned income	231,919	223,902
Consolidated VIEs
Assets
Cash and due from banks (including segregated cash and other deposits)	478	536
Trading account assets	562	567
Investments	7,599	10,582
Loans, net of unearned income
Loans, net of unearned income	115,839	127,055
Allowance for loan losses	(7,247)	(8,000)
Total loans, net	108,592	119,055
Other assets	807	859
Total assets	118,038	131,599
Liabilities
Short-term borrowings	20,024	21,009
Long-term debt	45,046	50,451
Other liabilities	585	587
Total liabilities	65,655	72,047
Consolidated VIEs | Consumer
Loans, net of unearned income
Loans, net of unearned income	95,356	103,275
Consolidated VIEs | Corporate
Loans, net of unearned income
Loans, net of unearned income	$ 20,483	$ 23,780