CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities of continuing operations
Net income before attribution of noncontrolling interests		$ 4,107	$ 3,407
Net income attributable to noncontrolling interests		43	36
Citigroup’s net income		4,064	3,371
Income (loss) from discontinued operations, net of taxes		(1)	(1)
Income from continuing operations—excluding noncontrolling interests		4,065	3,372
Adjustments to reconcile net income to net cash provided by (used in) operating activities of continuing operations
Depreciation and amortization		1,050	1,110
Deferred income taxes		(8)	(348)
Provisions for credit losses and for benefits and claims	[1]	2,723	2,365
Realized gains from sales of investments		(121)	(115)
Impairment losses on investments and other assets		58	30
Change in trading account assets		(75,872)	(19,761)
Change in trading account liabilities		14,842	1,307
Change in brokerage receivables net of brokerage payables		5,102	2,075
Change in loans held-for-sale (HFS)		(856)	(414)
Change in other assets		(3,067)	(997)
Change in other liabilities	[2]	(2,168)	(4,272)
Other, net		(4,456)	4,817
Total adjustments		(62,773)	(14,203)
Net cash provided by (used in) operating activities of continuing operations		(58,708)	(10,831)
Cash flows from investing activities of continuing operations
Change in securities borrowed and purchased under agreements to resell		(116,153)	1,436
Change in loans		(11,506)	11,380
Proceeds from sales and securitizations of loans		1,002	709
Available-for-sale (AFS) debt securities
Purchases of investments		(73,927)	(70,491)
Proceeds from sales of investments		36,332	15,372
Proceeds from maturities of investments		45,315	55,520
Held-to-maturity (HTM) debt securities
Purchases of investments		(4,940)	(2,823)
Proceeds from maturities of investments		26,941	4,613
Capital expenditures on premises and equipment and capitalized software		(1,517)	(1,607)
Proceeds from sales of premises and equipment and repossessed assets		11	162
Other, net		(541)	573
Net cash provided by (used in) investing activities of continuing operations		(98,983)	14,844
Cash flows from financing activities of continuing operations
Dividends paid		(1,323)	(1,291)
Issuance of preferred stock		1,995	548
Redemption of preferred stock		(1,500)	(550)
Treasury stock acquired		(1,751)	(413)
Stock tendered for payment of withholding taxes		(754)	(433)
Change in securities loaned and sold under agreements to repurchase		149,204	21,280
Issuance of long-term debt		29,612	20,412
Payments and redemptions of long-term debt		(23,093)	(20,137)
Change in deposits		31,952	(1,518)
Change in short-term borrowings		634	(5,547)
Net cash provided by (used in) financing activities of continuing operations		184,976	12,351
Effect of exchange rate changes on cash, due from banks and deposits with banks		4,514	(4,566)
Change in cash, due from banks and deposits with banks		31,799	11,798
Cash, due from banks and deposits with banks at beginning of period		276,532	260,932
Cash, due from banks and deposits with banks at end of period		308,331	272,730
Cash and due from banks (including segregated cash and other deposits)		24,463	25,174
Deposits with banks, net of allowance		283,868	247,556
Cash, due from banks and deposits with banks at end of period		308,331	272,730
Supplemental disclosure of cash flow information for continuing operations
Cash paid during the period for income taxes	[3]	1,514	1,457
Cash paid during the period for interest		19,389	22,115
Non-cash investing activities
Transfers to loans HFS (Other assets) from loans HFI	[4]	$ 1,032	$ 959

[1]     Effective January 1, 2025, certain transaction processing fees paid by Citi, primarily to credit card networks, which were previously presented within Other operating expenses, are presented as contra-revenue within Commissions and fees reported in Non-interest revenue. Prior periods were conformed to reflect this change in presentation.

[2] Includes balances related to the FDIC special assessment and restructuring charges (see Notes 17 and 9, respectively).

[3] Includes net cash paid (received) for purchases and sales of nonrefundable, transferable tax credits.

[4] Operating and finance lease right-of-use assets and lease liabilities represent non-cash investing and financing activities, respectively, and are not included in the non-cash investing activities presented here. See Note 26 for more information and balances as of March 31, 2025.