CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Interest revenue		$ 74,408	$ 50,475	$ 58,089
Interest expense		25,740	7,981	13,338
Net interest income		48,668	42,494	44,751
Commissions and fees		9,175	13,672	11,385
Principal transactions		14,159	10,154	13,885
Administration and other fiduciary fees		3,784	3,943	3,472
Realized gains on sales of investments, net		67	665	1,756
Impairment losses on investments:
Impairment losses on investments and other assets		(499)	(206)	(165)
Provision for credit losses on AFS debt securities	[1]	5	(3)	(3)
Net impairment losses recognized in earnings		(494)	(209)	(168)
Other revenue		(21)	1,165	420
Total non-interest revenues		26,670	29,390	30,750
Total revenues, net of interest expense		75,338	71,884	75,501
Provisions for credit losses and for benefits and claims
Provision for credit losses on loans		4,745	(3,103)	15,922
Provision for credit losses on held-to-maturity (HTM) debt securities		33	(3)	7
Provision for credit losses on other assets		76	0	7
Policyholder benefits and claims		94	116	113
Provision for credit losses on unfunded lending commitments		291	(788)	1,446
Total provisions for credit losses and for benefits and claims	[2]	5,239	(3,778)	17,495
Operating expenses
Compensation and benefits		26,655	25,134	22,214
Premises and equipment		2,320	2,314	2,333
Technology/communication		8,587	7,828	7,383
Advertising and marketing		1,556	1,490	1,217
Other operating		12,174	11,427	11,227
Total operating expenses		51,292	48,193	44,374
Income from continuing operations before income taxes		18,807	27,469	13,632
Provision for income taxes		3,642	5,451	2,525
Income from continuing operations		15,165	22,018	11,107
Discontinued operations
Income (loss) from discontinued operations		(272)	7	(20)
Benefit for income taxes		(41)	0	0
Income (loss) from discontinued operations, net of taxes		(231)	7	(20)
Net income before attribution of noncontrolling interests		14,934	22,025	11,087
Noncontrolling interests		89	73	40
Citigroup’s net income		$ 14,845	$ 21,952	$ 11,047
Basic earnings per share
Income from continuing operations (in dollars per share)	[3]	$ 7.16	$ 10.21	$ 4.75
Loss from discontinued operations, net of taxes (in dollars per share)	[3]	(0.12)	0	(0.01)
Net income (in dollars per share)	[3]	$ 7.04	$ 10.21	$ 4.74
Weighted average common shares outstanding (in shares)		1,946.7	2,033.0	2,085.8
Diluted earnings per share
Income from continuing operations (in dollars per share)	[3]	$ 7.11	$ 10.14	$ 4.73
Loss from discontinued operations, net of taxes (in dollars per share)	[3]	(0.12)	0	(0.01)
Net income (in dollars per share)	[3]	$ 7.00	$ 10.14	$ 4.72
Adjusted weighted average common shares outstanding (in shares)		1,964.3	2,049.4	2,099.0

[1] n accordance with ASC 326, which requires the provision for credit losses on AFS securities to be included in revenue.

[2] This total excludes the provision for credit losses on AFS securities, which is disclosed separately above.

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