CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions		Total	Citigroup stockholders' equity	Preferred stock at aggregate liquidation value	Total Citigroup common stockholders’ equity	Common stock and additional paid-in capital (APIC)	Retained earnings	Treasury stock, at cost		Citigroup's accumulated other comprehensive income (loss)	Noncontrolling interests
Balance, beginning of period at Dec. 31, 2020				$ 19,480		$ 107,877	$ 168,272	$ (64,129)		$ (32,058)	$ 758
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				2,300
Redemption of preferred stock				(3,785)
Employee benefit plans						(3)		483	[1]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						40
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						39	(40)				(21)
Net income before attribution of noncontrolling interests		$ 18,846					18,779				67
Common dividends	[2]						(3,176)
Preferred dividends		(811)					(811)
Treasury stock acquired	[3]							(7,600)
Transactions between Citigroup and the noncontrolling-interest shareholders											2
Distributions paid to noncontrolling-interest shareholders											0
Citigroup’s total other comprehensive income										(4,793)	(71)
Net change in noncontrolling interests											(23)
Balance, end of period at Sep. 30, 2021		201,610	$ 200,875	17,995	$ 182,880	107,953	183,024	(71,246)		(36,851)	735
Balance, beginning of period at Jun. 30, 2021				17,995		107,851	179,686	(68,253)		(35,120)	751
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				0
Redemption of preferred stock				0
Employee benefit plans						60		7	[1]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						0
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						42	0				(10)
Net income before attribution of noncontrolling interests		4,668					4,644				24
Common dividends	[2]						(1,040)
Preferred dividends		(266)					(266)
Treasury stock acquired	[3]							(3,000)
Transactions between Citigroup and the noncontrolling-interest shareholders											1
Distributions paid to noncontrolling-interest shareholders											0
Citigroup’s total other comprehensive income										(1,731)	(31)
Net change in noncontrolling interests											(16)
Balance, end of period at Sep. 30, 2021		201,610	200,875	17,995	182,880	107,953	183,024	(71,246)		(36,851)	735
Balance, beginning of period at Dec. 31, 2021		202,672		18,995		108,034	184,948	(71,240)		(38,765)	700
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				0
Redemption of preferred stock				0
Employee benefit plans						343		513	[1]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						0
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						1	1				0
Net income before attribution of noncontrolling interests		12,400					12,332				68
Common dividends	[2]						(3,025)
Preferred dividends		(794)					(794)
Treasury stock acquired	[3]							(3,250)
Transactions between Citigroup and the noncontrolling-interest shareholders											(34)
Distributions paid to noncontrolling-interest shareholders											(51)
Citigroup’s total other comprehensive income										(9,533)	(126)
Net change in noncontrolling interests											(143)
Balance, end of period at Sep. 30, 2022		199,117	198,560	18,995	179,565	108,378	193,462	(73,977)		(48,298)	557
Balance, beginning of period at Jun. 30, 2022				18,995		108,241	191,261	(73,988)		(45,495)	612
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				0
Redemption of preferred stock				0
Employee benefit plans						137		11	[1]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						0
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						0	0				(2)
Net income before attribution of noncontrolling interests		3,509					3,479				30
Common dividends	[2]						(1,001)
Preferred dividends		(277)					(277)
Treasury stock acquired	[3]							0
Transactions between Citigroup and the noncontrolling-interest shareholders											0
Distributions paid to noncontrolling-interest shareholders											(39)
Citigroup’s total other comprehensive income										(2,803)	(44)
Net change in noncontrolling interests											(55)
Balance, end of period at Sep. 30, 2022		$ 199,117	$ 198,560	$ 18,995	$ 179,565	$ 108,378	$ 193,462	$ (73,977)		$ (48,298)	$ 557

[1] Includes treasury stock related to (i) certain activity on employee stock option program exercises where the employee delivers existing shares to cover the option exercise, or (ii) under Citi’s employee restricted or deferred stock programs where shares are withheld to satisfy tax requirements.

[2] Common dividends declared were $0.51 per share for each of the first, second and third quarters of 2022 and 2021.

[3] Primarily consists of open market purchases under Citi’s Board of Directors-approved common share repurchase program.