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						(63)		476	[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)						(3)	(40)				(11)
Net income before attribution of noncontrolling interests		$ 14,178					14,135				43
Common dividends	[2]						(2,136)
Preferred dividends		(545)					(545)
Treasury stock acquired	[3]							(4,600)
Transactions between Citigroup and the noncontrolling-interest shareholders											1
Citigroup’s total other comprehensive income										(3,062)	(40)
Net change in noncontrolling interests											(7)
Balance, end of period at Jun. 30, 2021		202,910	$ 202,159	17,995	$ 184,164	107,851	179,686	(68,253)		(35,120)	751
Balance, beginning of period at Mar. 31, 2021				20,280		107,725	174,816	(65,261)		(35,011)	724
Increase (Decrease) in Stockholders' Equity
Redemption of preferred stock				(2,285)
Employee benefit plans						112		8	[1]
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						6	(8)				(2)
Net income before attribution of noncontrolling interests		6,203					6,193				10
Common dividends	[2]						(1,062)
Preferred dividends		(253)					(253)
Treasury stock acquired	[3]							(3,000)
Transactions between Citigroup and the noncontrolling-interest shareholders											1
Citigroup’s total other comprehensive income										(109)	18
Net change in noncontrolling interests											27
Balance, end of period at Jun. 30, 2021		202,910	202,159	17,995	184,164	107,851	179,686	(68,253)		(35,120)	751
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
Employee benefit plans						206		502	[1]
Preferred stock issuance costs (new issuances, net of reclassifications to retained earnings for redemptions)						8
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)						1	1				1
Net income before attribution of noncontrolling interests		8,891					8,853				38
Common dividends	[2]						(2,024)
Preferred dividends		(517)					(517)
Treasury stock acquired	[3]							(3,250)
Transactions between Citigroup and the noncontrolling-interest shareholders											(34)
Distributions paid to noncontrolling-interest shareholders											(11)
Citigroup’s total other comprehensive income										(6,730)	(82)
Net change in noncontrolling interests											(88)
Balance, end of period at Jun. 30, 2022		199,626	199,014	18,995	180,019	108,241	191,261	(73,988)		(45,495)	612
Balance, beginning of period at Mar. 31, 2022				18,995		108,081	187,962	(73,744)		(43,585)	644
Increase (Decrease) in Stockholders' Equity
Employee benefit plans						160		6	[1]
Other (primarily reclassifications from APIC for preferred issuance costs on redemptions)											2
Net income before attribution of noncontrolling interests		4,568					4,547				21
Common dividends	[2]						(1,010)
Preferred dividends		(238)					(238)
Treasury stock acquired	[3]							(250)
Transactions between Citigroup and the noncontrolling-interest shareholders											(1)
Distributions paid to noncontrolling-interest shareholders											(1)
Citigroup’s total other comprehensive income										(1,910)	(53)
Net change in noncontrolling interests											(32)
Balance, end of period at Jun. 30, 2022		$ 199,626	$ 199,014	$ 18,995	$ 180,019	$ 108,241	$ 191,261	$ (73,988)		$ (45,495)	$ 612

[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 and second quarters of 2022 and 2021.

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