CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Citigroup’s net income		$ 6,193	$ 1,056	$ 14,135	$ 3,592
Add: Citigroup’s other comprehensive income
Net change in unrealized gains and losses on debt securities, net of taxes	[1]	(474)	837	(2,259)	3,965
Net change in debt valuation adjustment (DVA), net of taxes	[1],[2]	(62)	(2,232)	(104)	908
Net change in cash flow hedges, net of taxes	[1]	(173)	74	(729)	1,971
Benefit plans liability adjustment, net of taxes	[1]	87	(77)	801	(363)
Net change in foreign currency translation adjustment, net of taxes and hedges	[1]	523	561	(751)	(3,548)
Net change in excluded component of fair value hedges, net of taxes	[1]	(10)	13	(20)	40
Citigroup’s total other comprehensive income (loss)	[1]	(109)	(824)	(3,062)	2,973
Total Citigroup comprehensive income (loss)		6,084	232	11,073	6,565
Add: Other comprehensive income (loss) attributable to noncontrolling interests		18	39	(40)	(12)
Add: Net income (loss) attributable to noncontrolling interests		10	0	43	(6)
Total comprehensive income		$ 6,112	$ 271	$ 11,076	$ 6,547

[1] See Note 17 to the Consolidated Financial Statements.

[2] See Note 20 to the Consolidated Financial Statements.