CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities of continuing operations
Net income before attribution of noncontrolling interests		$ 14,178	$ 3,586
Net income (loss) attributable to noncontrolling interests		43	(6)
Citigroup’s net income		14,135	3,592
Income (loss) from discontinued operations, net of taxes		8	(19)
Income from continuing operations—excluding noncontrolling interests		14,127	3,611
Adjustments to reconcile net income to net cash provided by (used in) operating activities of continuing operations
Depreciation and amortization		1,944	1,853
Provisions for credit losses on loans and unfunded lending commitments		(3,187)	15,037
Realized gains from sales of investments		(538)	(1,180)
Impairment losses on investments and other assets		82	124
Change in trading account assets		4,098	(86,203)
Change in trading account liabilities		6,679	29,370
Change in brokerage receivables net of brokerage payables		(7,400)	190
Change in loans HFS		(3,214)	(1,200)
Change in other assets		(2,260)	1,472
Change in other liabilities		3,300	2,620
Other, net		9,932	15,098
Total adjustments		9,436	(22,819)
Net cash provided by (used in) operating activities of continuing operations		23,563	(19,208)
Cash flows from investing activities of continuing operations
Change in securities borrowed and purchased under agreements to resell		(14,335)	(31,595)
Change in loans		(3,088)	7,943
Proceeds from sales and securitizations of loans		869	826
Purchases of investments		(201,567)	(207,701)
Proceeds from sales of investments		66,477	86,191
Proceeds from maturities of investments		75,195	53,909
Capital expenditures on premises and equipment and capitalized software		(1,771)	(1,318)
Proceeds from sales of premises and equipment, subsidiaries and affiliates and repossessed assets		28	12
Other, net		81	44
Net cash used in investing activities of continuing operations		(78,111)	(91,689)
Cash flows from financing activities of continuing operations
Dividends paid		(2,663)	(2,679)
Issuance of preferred stock		2,300	1,500
Redemption of preferred stock		(3,785)	(1,500)
Treasury stock acquired		(4,381)	(2,925)
Stock tendered for payment of withholding taxes		(324)	(407)
Change in securities loaned and sold under agreements to repurchase		22,292	49,383
Issuance of long-term debt		41,511	58,471
Payments and redemptions of long-term debt		(41,894)	(32,297)
Change in deposits		29,610	163,070
Change in short-term borrowings		1,948	(4,893)
Net cash provided by financing activities of continuing operations		44,614	227,723
Effect of exchange rate changes on cash and due from banks		(443)	(972)
Change in cash, due from banks and deposits with banks		(10,377)	115,854
Cash, due from banks and deposits with banks at beginning of period		309,615	193,919
Cash, due from banks and deposits with banks at end of period		299,238	309,773
Cash and due from banks (including segregated cash and other deposits)		27,117	22,889
Deposits with banks, net of allowance		272,121	286,884
Cash, due from banks and deposits with banks at end of period		299,238	309,773
Supplemental disclosure of cash flow information for continuing operations
Cash paid during the period for income taxes		2,176	2,543
Cash paid during the period for interest		4,545	8,751
Non-cash investing activities
Transfers to loans HFS (Other assets) from loans	[1]	$ 961	$ 1,036

[1] 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 22 to the Consolidated Financial Statements for more information and balances as of June 30, 2021.