Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows provided by (used in) operating activities:
Net cash provided by (used in) operating activities	$ 11,518	$ 32,279
Cash flows provided by investing activities:
Purchases of trading securities held for investment	(5,855)	(1,542)
Proceeds from maturities and paydowns of trading securities held for investment	2,036	2,671
Proceeds from sales of trading securities held for investment	11,118	1,357
Purchases of available-for-sale securities	0	(34)
Proceeds from maturities and paydowns of available-for-sale securities	8,265	9,423
Proceeds from sales of available-for-sale securities	14,312	923
Purchases of loans held for investment	(161,737)	(141,539)
Net change in restricted cash	36,394	(9,147)
Advances to lenders	(114,584)	(97,508)
Proceeds from disposition of acquired property and preforeclosure sales	29,688	29,822
Net change in federal funds sold and securities purchased under agreements to resell or similar arrangements	(7,800)	500
Other, net	619	56
Net cash provided by investing activities	383,294	386,403
Cash flows used in financing activities:
Payments of cash dividends on senior preferred stock to Treasury	(73,835)	(8,679)
Proceeds from senior preferred stock purchase agreement with Treasury	0	4,571
Other, net	0	(9)
Net cash used in financing activities	(385,145)	(415,547)
Net increase (decrease) in cash and cash equivalents	9,667	3,135
Cash and cash equivalents at beginning of period	21,117	17,539
Cash and cash equivalents at end of period	30,784	20,674
Cash paid during the period for:
Interest	82,086	90,338
Income Taxes	1,876	0
Fannie Mae [Member]
Cash flows provided by investing activities:
Proceeds from repayments and sales of loans acquired as held-for-investment of Fannie Mae	38,427	22,540
Cash flows used in financing activities:
Proceeds from issuance of debt	326,036	550,087
Payments to redeem debt	(377,514)	(630,546)
Consolidated Trusts [Member]
Cash flows provided by investing activities:
Proceeds from repayments of loans acquired as held for investment of consolidated trusts	532,411	568,881
Cash flows used in financing activities:
Proceeds from issuance of debt	339,687	270,552
Payments to redeem debt	$ (599,519)	$ (601,523)