CONSOLIDATED STATEMENT OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues
Interest revenue		$ 12,534	$ 17,139
Interest expense		2,368	5,647
Net interest revenue		10,166	11,492
Commissions and fees		3,670	3,021
Principal transactions		3,913	5,261
Administration and other fiduciary fees		961	854
Realized gains on sales of investments, net		401	432
Impairment losses on investments:
Impairment losses on investments and other assets		(69)	(55)
Provision for credit losses on AFS debt securities	[1]	0	0
Net impairment losses recognized in earnings		(69)	(55)
Other revenue (loss)		285	(274)
Total non-interest revenues		9,161	9,239
Total revenues, net of interest expense		19,327	20,731
Provisions for credit losses and for benefits and claims
Provision for credit losses on loans		(1,479)	6,377
Provision for credit losses on held-to-maturity (HTM) debt securities		(11)	6
Provision for credit losses on other assets		9	(4)
Policyholder benefits and claims		52	24
Provision for credit losses on unfunded lending commitments		(626)	557
Total provisions for credit losses and for benefits and claims		(2,055)	6,960
Operating expenses
Compensation and benefits		6,001	5,654
Premises and equipment		576	565
Technology/communication		1,852	1,723
Advertising and marketing		270	328
Other operating		2,374	2,373
Total operating expenses		11,073	10,643
Income (loss) from continuing operations before income taxes		10,309	3,128
Provision for income taxes		2,332	580
Income from continuing operations		7,977	2,548
Discontinued operations
Loss from discontinued operations		(2)	(18)
Benefit for income taxes		0	0
Income (loss) from discontinued operations, net of taxes		(2)	(18)
Net income before attribution of noncontrolling interests		7,975	2,530
Noncontrolling interests		33	(6)
Citigroup’s net income		$ 7,942	$ 2,536
Basic earnings per share
Income from continuing operations (in dollars per share)	[2]	$ 3.64	$ 1.07
Income from discontinued operations, net of taxes (in dollars per share)	[2]	0	(0.01)
Net income (in dollars per share)	[2]	$ 3.64	$ 1.06
Weighted average common shares outstanding (in shares)		2,082.0	2,097.9
Diluted earnings per share
Income from continuing operations (in dollars per share)	[2]	$ 3.62	$ 1.06
Income (loss) from discontinued operations, net of taxes (in dollars per share)	[2]	0	(0.01)
Net income (in dollars per share)	[2]	$ 3.62	$ 1.06
Adjusted weighted average common shares outstanding (in shares)		2,096.6	2,113.7

[1] In accordance with ASC 326.

[2] Due to rounding, earnings per share on continuing operations and discontinued operations may not sum to earnings per share on net income.