CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Revenues
Interest revenue	$ 68,138		$ 72,681		$ 79,282
Interest expense	20,535		24,234		25,096
Net interest revenue	47,603		48,447		54,186
Commissions and fees	12,926		12,850		13,658
Principal transactions	4,781		7,234		7,517
Administration and other fiduciary fees	4,012		3,995		4,005
Realized gains (losses) on sales of investments, net	3,251		1,997		2,411
Other-than-temporary impairment losses on investments
Gross impairment losses	(5,037)	[1]	(2,413)	[1]	(1,495)	[1]
Less: Impairments recognized in AOCI	66		159		84
Net impairment losses recognized in earnings	(4,971)		(2,254)		(1,411)
Insurance premiums	2,476		2,647		2,684
Other revenue	95	[2]	3,437	[2]	3,551	[2]
Total non-interest revenues	22,570		29,906		32,415
Total revenues, net of interest expense	70,173		78,353		86,601
Provisions for credit losses and for benefits and claims
Provision for loan losses	10,848		11,773		25,194
Policyholder benefits and claims	887		972		965
Provision (release) for unfunded lending commitments	(16)		51		(117)
Total provisions for credit losses and for benefits and claims	11,719		12,796		26,042
Operating expenses
Compensation and benefits	25,204		25,688		24,430
Premises and equipment	3,282		3,326		3,331
Technology/communication	5,914		5,133		4,924
Advertising and marketing	2,224		2,346		1,645
Other operating	13,894		14,440		13,045
Total operating expenses	50,518	[3]	50,933	[3]	47,375	[3]
Income (loss) from continuing operations before income taxes	7,936		14,624		13,184
Provision for income taxes (benefit)	27		3,521		2,233
Income from continuing operations	7,909		11,103		10,951
Discontinued operations
Income (loss) from discontinued operations	(219)		23		72
Gain (loss) on sale	(1)		155		(702)
Provision (benefit) for income taxes	(71)		66		(562)
Income (loss) from discontinued operations, net of taxes	(149)		112		(68)
Net income before attribution of noncontrolling interests	7,760		11,215		10,883
Noncontrolling interests	219		148		281
Citigroup's net income	$ 7,541		$ 11,067		$ 10,602
Basic earnings per share
Income from continuing operations (in dollars per share)	$ 2.56	[4]	$ 3.69	[4]	$ 3.66	[4]
Income (loss) from discontinued operations, net of taxes (in dollars per share)	$ (0.05)	[4]	$ 0.04	[4]	$ (0.01)	[4]
Net income (in dollars per share)	$ 2.51	[4]	$ 3.73	[4]	$ 3.65	[4]
Weighted average common shares outstanding (in shares)	2,930.6		2,909.8		2,877.6
Diluted earnings per share
Income from continuing operations (in dollars per share)	$ 2.49	[4]	$ 3.59	[4]	$ 3.55	[4]
Income (loss) from discontinued operations, net of taxes (in dollars per share)	$ (0.05)	[4]	$ 0.04	[4]	$ (0.01)	[4]
Net income (in dollars per share)	$ 2.44	[4]	$ 3.63	[4]	$ 3.54	[4]
Adjusted weighted average common shares outstanding (in shares)	3,015.5		2,998.8		2,967.8

[1] 2012 includes the recognition of a $3,340 million impairment charge related to the carrying value of Citi's remaining 35% interest in the Morgan Stanley Smith Barney joint venture (MSSB), as well as the recognition of a $1,181 million impairment charge related to Citi's investment in Akbank. See Note 15 to the Consolidated Financial Statements.

[2] Other revenue for 2012 includes a $1,344 million loss related to the sale of a 14% interest in MSSB, as well as the recognition of a $424 million loss related to the sale of a 10.1% stake in Akbank.

[3] Citigroup recorded repositioning charges of $1,375 million for 2012, $706 million for 2011 and $507 million for 2010.

[4] All per share amounts and Citigroup shares outstanding for all periods reflect Citigroup's 1-for-10 reverse stock split, which was effective May 6, 2011.