CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Citigroup’s net income		$ 3,546	$ 3,479	$ 11,067	$ 12,332
Add: Citigroup’s other comprehensive income, net change, net of taxes
Unrealized gains and losses on debt securities	[1],[2]	(169)	(580)	793	(6,358)
Debt valuation adjustment (DVA)	[2],[3]	299	872	(645)	3,632
Cash flow hedges	[2]	731	(763)	1,263	(2,970)
Benefit plans liability adjustment	[2],[4]	312	37	72	119
CTA, net of hedges	[2]	(1,496)	(2,399)	(632)	(4,043)
Excluded component of fair value hedges	[2]	(12)	30	(15)	87
Long-duration insurance contracts	[2]	23	0	22	0
Citigroup’s total other comprehensive income (loss)	[2]	(312)	(2,803)	858	(9,533)
Total Citigroup comprehensive income (loss)		3,234	676	11,925	2,799
Add: Other comprehensive income (loss) attributable to noncontrolling interests		(37)	(44)	9	(126)
Add: Net income (loss) attributable to noncontrolling interests		41	30	122	68
Total comprehensive income		$ 3,238	$ 662	$ 12,056	$ 2,741

[1] See Note 12

[2] See Note 18.

[3] See Note 22.

[4] See Note 8.