CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Citigroup’s net income		$ 4,606	$ 4,306
Add: Citigroup’s other comprehensive income
Net change in unrealized gains and losses on debt securities, net of taxes	[1],[2]	836	(4,277)
Net change in debt valuation adjustment (DVA), net of taxes	[2],[3]	(325)	793
Net change in cash flow hedges, net of taxes	[2]	361	(1,541)
Benefit plans liability adjustment, net of taxes(4)	[2],[4]	(104)	171
Net change in CTA, net of taxes and hedges	[2]	841	(14)
Net change in excluded component of fair value hedges, net of taxes	[2]	(20)	48
Net change in long-duration insurance contracts, net of taxes	[2]	5	0
Citigroup’s total other comprehensive income (loss)	[2]	1,594	(4,820)
Total Citigroup comprehensive income (loss)		6,200	(514)
Add: Other comprehensive income (loss) attributable to noncontrolling interests		32	(29)
Add: Net income (loss) attributable to noncontrolling interests		45	17
Total comprehensive income		$ 6,277	$ (526)

[1] See Note 12

[2] See Note 18.

[3] See Note 21.

[4] See Note 8.