CONSOLIDATED BALANCE SHEET (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks (including segregated cash and other deposits)	$ 33,802	$ 28,701
Deposits with banks	170,028	155,784
Federal funds sold and securities borrowed or purchased under agreements to resell (including $166,506 and $142,862 as of September 30, 2012 and December 31, 2011, respectively, at fair value)	277,542	275,849
Brokerage receivables	31,077	27,777
Trading account assets	315,201	291,734
Investments	295,474	293,413
Loans, net of unearned income
Loans, net of unearned income	658,423	647,242
Allowance for loan losses	(25,916)	(30,115)
Total loans, net	632,507	617,127
Goodwill	25,915	25,413
Intangible assets (other than MSRs)	5,963	6,600
Mortgage servicing rights (MSRs)	1,920	2,569
Other assets	141,873	148,911
Assets of discontinued operations held for sale	44
Total assets	1,931,346	1,873,878
Liabilities
Non-interest-bearing deposits in U.S. offices	133,981	119,437
Interest-bearing deposits in U.S. offices (including $892 and $848 as of September 30, 2012 and December 31, 2011, respectively, at fair value)	239,574	223,851
Non-interest-bearing deposits in offices outside the U.S.	63,792	57,357
Interest-bearing deposits in offices outside the U.S. (including $972 and $478 as of September 30, 2012 and December 31, 2011, respectively, at fair value)	507,297	465,291
Total deposits	944,644	865,936
Federal funds purchased and securities loaned or sold under agreements to repurchase (including $123,459 and $97,712 as of September 30, 2012 and December 31, 2011, respectively, at fair value)	224,370	198,373
Brokerage payables	55,376	56,696
Trading account liabilities	129,990	126,082
Short-term borrowings	49,164	54,441
Long-term debt	271,862	323,505
Other liabilities	67,202	69,272
Liabilities of discontinued operations held for sale	0
Total liabilities	1,742,608	1,694,305
Stockholders' equity
Preferred stock ($1.00 par value; authorized shares: 30 million), issued shares: 12,038 as of September 30, 2012 and December 31, 2011, at aggregate liquidation value	312	312
Common stock ($0.01 par value; authorized shares: 6 billion), issued shares: 2,946,810,798 as of September 30, 2012 and 2,937,755,921 as of December 31, 2011	29	29
Additional paid-in capital	106,203	105,804
Retained earnings	96,650	90,520
Treasury stock, at cost: September 30, 2012-14,290,098 shares and December 31, 2011-13,877,688 shares	(851)	(1,071)
Accumulated other comprehensive income (loss)	(15,566)	(17,788)
Total Citigroup stockholders' equity	186,777	177,806
Noncontrolling interest	1,961	1,767
Total equity	188,738	179,573
Total liabilities and equity	1,931,346	1,873,878
Consumer
Loans, net of unearned income
Loans, net of unearned income	407,752	423,340
Corporate
Loans, net of unearned income
Loans, net of unearned income	250,671	223,902
Consolidated VIEs
Assets
Cash and due from banks (including segregated cash and other deposits)	589	536
Trading account assets	570	567
Investments	7,429	10,582
Loans, net of unearned income
Loans, net of unearned income	113,291	127,055
Allowance for loan losses	(6,042)	(8,000)
Total loans, net	107,249	119,055
Other assets	1,252	859
Total assets	117,089	131,599
Liabilities
Short-term borrowings	16,624	21,009
Long-term debt	35,641	50,451
Other liabilities	641	587
Total liabilities	52,906	72,047
Consolidated VIEs | Consumer
Loans, net of unearned income
Loans, net of unearned income	91,452	103,275
Consolidated VIEs | Corporate
Loans, net of unearned income
Loans, net of unearned income	$ 21,839	$ 23,780