CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities of continuing operations
Net income before attribution of noncontrolling interests	$ 3,898	$ 3,057
Net income attributable to noncontrolling interests	90	126
Citigroup's net income	3,808	2,931
Loss from discontinued operations, net of taxes	(105)	(4)
Gain (loss) on sale, net of taxes	38	(1)
Income from continuing operations-excluding noncontrolling interests	3,875	2,936
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations
Depreciation and amortization	603	738
Provision for credit losses	2,309	2,790
Realized gains from sales of investments	(450)	(1,925)
Net impairment losses recognized in earnings	261	1,305
Change in trading account assets	12,608	(15,316)
Change in trading account liabilities	4,677	9,874
Change in federal funds sold and securities borrowed or purchased under agreements to resell	(9,115)	(13,208)
Change in federal funds purchased and securities loaned or sold under agreements to repurchase	10,817	27,635
Change in brokerage receivables net of brokerage payables	(459)	(11,396)
Change in loans held-for-sale	(2,699)	3,861
Change in other assets	5,623	(2,196)
Change in other liabilities	721	71
Other, net	(3,752)	4,284
Total adjustments	21,144	6,517
Net cash provided by operating activities of continuing operations	25,019	9,453
Cash flows from investing activities of continuing operations
Change in deposits with banks	(41,093)	(28,165)
Change in loans	1,205	(7,813)
Proceeds from sales and securitizations of loans	2,351	1,043
Purchases of investments	(57,410)	(62,929)
Proceeds from sales of investments	41,288	31,006
Proceeds from maturities of investments	25,987	29,165
Capital expenditures on premises and equipment and capitalized software	(734)	(844)
Proceeds from sales of premises and equipment, subsidiaries and affiliates, and repossessed assets	140	163
Net cash used in investing activities of continuing operations	(28,266)	(38,374)
Cash flows from financing activities of continuing operations
Dividends paid	(34)	(34)
Issuance of preferred stock	575
Treasury stock acquired		(4)
Stock tendered for payment of withholding taxes	(444)	(187)
Issuance of long-term debt	9,273	7,725
Payments and redemptions of long-term debt	(10,198)	(23,168)
Change in deposits	3,202	40,076
Change in short-term borrowings	(3,834)	1,920
Net cash (used in) provided by financing activities of continuing operations	(1,460)	26,328
Effect of exchange rate changes on cash and cash equivalents	(596)	397
Discontinued operations
Net cash provided by discontinued operations	0
Change in cash and due from banks	(5,303)	(2,196)
Cash and due from banks at beginning of year	36,453	28,701
Cash and due from banks at end of year	31,150	26,505
Supplemental disclosure of cash flow information for continuing operations
Cash paid during the year for income taxes	1,127	916
Cash paid during the year for interest	3,755	4,602
Non-cash investing activities
Transfers to OREO and other repossessed assets	$ 68	$ 137