CONSOLIDATED BALANCE SHEET (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks (including segregated cash and other deposits)	$ 33,927	$ 28,701
Deposits with banks	155,054	155,784
Federal funds sold and securities borrowed or purchased under agreements to resell (including $167,973 and $142,862 as of June 30, 2012 and December 31, 2011, respectively, at fair value)	272,664	275,849
Brokerage receivables	35,340	27,777
Trading account assets	310,246	291,734
Investments	305,926	293,413
Loans, net of unearned income
Loans, net of unearned income	654,968	647,242
Allowance for loan losses	(27,611)	(30,115)
Total loans, net	627,357	617,127
Goodwill	25,483	25,413
Intangible assets (other than MSRs)	6,156	6,600
Mortgage servicing rights (MSRs)	2,117	2,569
Other assets	142,181	148,911
Total assets	1,916,451	1,873,878
Liabilities
Non-interest-bearing deposits in U.S. offices	120,324	119,437
Interest-bearing deposits in U.S. offices (including $808 and $848 as of June 30, 2012 and December 31, 2011, respectively, at fair value)	233,696	223,851
Non-interest-bearing deposits in offices outside the U.S.	59,745	57,357
Interest-bearing deposits in offices outside the U.S. (including $607 and $478 as of June 30, 2012 and December 31, 2011, respectively, at fair value)	500,543	465,291
Total deposits	914,308	865,936
Federal funds purchased and securities loaned or sold under agreements to repurchase (including $132,637 and $112,770 as of June 30, 2012 and December 31, 2011, respectively, at fair value)	214,851	198,373
Brokerage payables	59,133	56,696
Trading account liabilities	128,818	126,082
Short-term borrowings	58,698	54,441
Long-term debt	288,334	323,505
Other liabilities	66,470	69,272
Total liabilities	1,730,612	1,694,305
Stockholders' equity
Preferred stock ($1.00 par value; authorized shares: 30 million), issued shares: 12,038 as of June 30, 2012 and December 31, 2011, at aggregate liquidation value	312	312
Common stock ($0.01 par value; authorized shares: 6 billion), issued shares: 2,946,804,926 as of June 30, 2012 and 2,937,755,921 as of December 31, 2011	29	29
Additional paid-in capital	105,962	105,804
Retained earnings	96,216	90,520
Treasury stock, at cost: June 30, 2012-14,321,688 shares and December 31, 2011-13,877,688 shares	(859)	(1,071)
Accumulated other comprehensive income (loss)	(17,749)	(17,788)
Total Citigroup stockholders' equity	183,911	177,806
Noncontrolling interest	1,928	1,767
Total equity	185,839	179,573
Total liabilities and equity	1,916,451	1,873,878
Consumer
Loans, net of unearned income
Loans, net of unearned income	409,127	423,340
Corporate
Loans, net of unearned income
Loans, net of unearned income	245,841	223,902
Consolidated VIEs
Assets
Cash and due from banks (including segregated cash and other deposits)	832	536
Trading account assets	485	567
Investments	7,687	10,582
Loans, net of unearned income
Loans, net of unearned income	116,044	127,055
Allowance for loan losses	(6,492)	(8,000)
Total loans, net	109,552	119,055
Other assets	887	859
Total assets	119,443	131,599
Liabilities
Short-term borrowings	20,934	21,009
Long-term debt	37,918	50,451
Other liabilities	743	587
Total liabilities	59,595	72,047
Consolidated VIEs | Consumer
Loans, net of unearned income
Loans, net of unearned income	93,481	103,275
Consolidated VIEs | Corporate
Loans, net of unearned income
Loans, net of unearned income	$ 22,563	$ 23,780