Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 83,982	$ 17,220	$ (16,855)
Reconciliation of net income (loss) to net cash provided by (used in) operating activities:
Amortization of cost basis adjustments	(5,104)	(2,335)	(369)
(Benefit) provision for credit losses	(8,949)	(852)	26,718
Current and deferred federal income taxes	(47,766)	10	1,044
Net change in trading securities	1,575	31,972	(17,048)
Net gains related to the disposition of acquired property and preforeclosure sales, including credit enhancements	(6,024)	(6,009)	(5,109)
Other, net	(4,811)	(3,005)	(3,619)
Net cash provided by (used in) operating activities	12,903	37,001	(15,238)
Cash flows provided by investing activities:
Purchases of trading securities held for investment	(7,521)	(3,216)	(2,951)
Proceeds from maturities and paydowns of trading securities held for investment	2,491	3,508	2,591
Proceeds from sales of trading securities held for investment	14,585	3,861	1,526
Purchases of available-for-sale securities	0	(34)	(192)
Proceeds from maturities and paydowns of available-for-sale securities	10,116	12,636	13,552
Proceeds from sales of available-for-sale securities	15,497	1,306	3,192
Purchases of loans held for investment	(195,386)	(210,488)	(78,099)
Proceeds from repayments and sales of loans acquired as held for investment of Fannie Mae	48,875	31,322	25,190
Proceeds from repayments and sales of loans acquired as held for investment of consolidated trust	631,088	797,331	544,145
Net change in restricted cash	38,924	(17,122)	12,881
Advances to lenders	(139,162)	(144,064)	(70,914)
Proceeds from disposition of acquired property and preforeclosure sales	38,349	38,685	47,248
Net change in federal funds sold and securities purchased under agreements to resell or similar arrangements	(6,475)	13,500	(34,249)
Other, net	1,373	468	468
Net cash provided by investing activities	452,754	527,693	464,388
Cash flows used in financing activities:
Payments of cash dividends on senior preferred stock to Treasury	(82,452)	(11,608)	(9,613)
Proceeds from senior preferred stock purchase agreement with Treasury	0	4,571	23,978
Other, net	(145)	(9)	146
Net cash used in financing activities	(467,546)	(561,116)	(448,908)
Net (decrease) increase in cash and cash equivalents	(1,889)	3,578	242
Cash and cash equivalents at beginning of period	21,117	17,539	17,297
Cash and cash equivalents at end of period	19,228	21,117	17,539
Cash paid during the period for:
Interest	109,240	119,259	128,806
Income Taxes Paid	2,350	0	0
Non-cash activities:
Net mortgage loans acquired by assuming debt	433,007	537,862	448,437
Net transfers from (to) mortgage loans of Fannie Mae to (from) mortgage loans of consolidated trusts	179,097	165,272	33,859
Transfers from advances to lenders to loans held for investment of consolidated trusts	137,074	133,554	69,223
Net transfers from mortgage loans to acquired property	34,024	46,981	56,517
Fannie Mae [Member]
Cash flows used in financing activities:
Proceeds from the issuance of debt	372,361	736,065	766,598
Payments to redeem debt	(459,745)	(854,111)	(815,838)
Consolidated Trusts [Member]
Cash flows used in financing activities:
Proceeds from the issuance of debt	409,979	396,513	233,516
Payments to redeem debt	$ (707,544)	$ (832,537)	$ (647,695)