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	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	[1]	Retained earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury stock, at cost		Citigroup's accumulated other comprehensive income (loss)	Citigroup's accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjustment	[1]	Citigroup's accumulated other comprehensive income (loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling interests
Balance, beginning of period at Dec. 31, 2021				$ 18,995		$ 108,034	$ 184,948	$ 0		$ 184,948	$ (71,240)		$ (38,765)	$ 0		$ (38,765)	$ 700
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				0
Employee benefit plans						46					496	[2]
Other						1	1										(11)
Net income before attribution of noncontrolling interests		$ 4,323					4,306										17
Common dividends	[3]						(1,014)
Preferred dividends		(279)					(279)
Treasury stock acquired	[4]										(3,000)
Transactions between Citigroup and the noncontrolling-interest shareholders																	(33)
Distributions paid to noncontrolling-interest shareholders																	0
Citigroup’s total other comprehensive income													(4,820)				(29)
Net change in noncontrolling interests																	(56)
Balance, end of period at Mar. 31, 2022		198,353	$ 197,709	18,995	$ 178,714	108,081	187,962				(73,744)		(43,585)				644
Balance, beginning of period at Dec. 31, 2022		201,838		18,995		108,489	194,734	$ 290		$ 195,024	(73,967)		(47,062)	$ 27		$ (47,035)	649
Increase (Decrease) in Stockholders' Equity
Issuance of new preferred stock				1,250
Employee benefit plans						(84)					705	[2]
Other						(5)	0										9
Net income before attribution of noncontrolling interests		4,651					4,606										45
Common dividends	[3]						(1,000)
Preferred dividends		(277)					(277)
Treasury stock acquired	[4]										0
Transactions between Citigroup and the noncontrolling-interest shareholders																	0
Distributions paid to noncontrolling-interest shareholders																	(11)
Citigroup’s total other comprehensive income													1,594				32
Net change in noncontrolling interests																	75
Balance, end of period at Mar. 31, 2023		$ 209,019	$ 208,295	$ 20,245	$ 188,050	$ 108,400	$ 198,353				$ (73,262)		$ (45,441)				$ 724

[1] See Note 1 for additional details.

[2] 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.

[3] Common dividends declared were $0.51 per share for each of the first quarters of 2023 and 2022.

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