CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities of continuing operations
Net income before attribution of noncontrolling interests	$ 9,544	$ 9,158
Net income attributable to noncontrolling interests	35	48
Citigroup’s net income	9,509	9,110
Income from discontinued operations, net of taxes	15	8
Income from continuing operations—excluding noncontrolling interests	9,494	9,102
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations
Depreciation and amortization	1,883	1,855
Provision for loan losses	4,033	3,598
Realized gains from sales of investments	(598)	(272)
Net impairment losses on investments, goodwill and intangible assets	13	43
Change in trading account assets	(50,776)	(10,235)
Change in trading account liabilities	(8,011)	15,575
Change in brokerage receivables net of brokerage payables	(9,309)	7,737
Change in loans HFS	1,029	(147)
Change in other assets	(5,442)	(5,799)
Change in other liabilities	6,462	(2,685)
Other, net	13,466	(10,453)
Total adjustments	(47,250)	(783)
Net cash provided by (used in) operating activities of continuing operations	(37,756)	8,319
Cash flows from investing activities of continuing operations
Change in securities borrowed and purchased under agreements to resell	10,915	(33,048)
Change in loans	(7,803)	(10,132)
Proceeds from sales and securitizations of loans	2,249	3,217
Purchases of investments	(118,132)	(81,871)
Proceeds from sales of investments	63,595	41,808
Proceeds from maturities of investments	57,684	44,846
Capital expenditures on premises and equipment and capitalized software	(3,349)	(1,690)
Proceeds from sales of premises and equipment, subsidiaries and affiliates and repossessed assets	68	143
Other, net	71	98
Net cash provided by (used in) investing activities of continuing operations	5,298	(36,629)
Cash flows from financing activities of continuing operations
Dividends paid	(2,650)	(2,232)
Redemption of preferred stock	(480)	(218)
Treasury stock acquired	(7,518)	(4,686)
Stock tendered for payment of withholding taxes	(359)	(475)
Change in securities loaned and sold under agreements to repurchase	3,365	21,551
Issuance of long-term debt	31,849	40,757
Payments and redemptions of long-term debt	(18,428)	(35,087)
Change in deposits	32,437	36,908
Change in short-term borrowings	10,096	(7,219)
Net cash provided by financing activities of continuing operations	48,312	49,299
Effect of exchange rate changes on cash and due from banks	(716)	(603)
Change in cash and due from banks and deposits with banks	15,138	20,386
Cash, due from banks and deposits with banks at beginning of period	188,105	180,516
Cash, due from banks and deposits with banks at end of period	203,243	200,902
Cash and due from banks and deposits with banks at end of period	188,105	180,516
Supplemental disclosure of cash flow information for continuing operations
Cash paid during the period for income taxes	2,814	2,239
Cash paid during the period for interest	14,000	9,957
Non-cash investing activities
Transfers to loans HFS from loans	$ 3,600	$ 2,900