CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Citigroup’s net income		$ 2,522	$ 4,710
Add: Citigroup’s other comprehensive income(1)
Net change in unrealized gains and losses on debt securities, net of taxes	[1]	3,128	1,135
Net change in debt valuation adjustment (DVA), net of taxes	[2]	3,140	(571)
Net change in cash flow hedges, net of taxes		1,897	286
Benefit plans liability adjustment, net of taxes		(286)	(64)
Net change in foreign currency translation adjustment, net of taxes and hedges		(4,109)	58
Net change in excluded component of fair value hedges, net of taxes		27	18
Citigroup’s total other comprehensive income		3,797	862
Citigroup’s total comprehensive income		6,319	5,572
Add: Other comprehensive income (loss) attributable to noncontrolling interests		(51)	(13)
Add: Net income attributable to noncontrolling interests		(6)	25
Total comprehensive income		$ 6,262	$ 5,584

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

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