Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest income:
Trading securities	$ 115	$ 127
Available-for-sale securities	376	440
Mortgage loans (includes $24,622 and $25,954, respectively, related to consolidated trusts)	27,044	28,588
Other	33	24
Total interest income	27,568	29,179
Interest expense:
Short-term debt	29	20
Long-term debt (includes $20,515 and $22,076, respectively, related to consolidated trusts)	22,472	24,421
Total interest expense	22,501	24,441
Net interest income	5,067	4,738
Benefit for credit losses	533	774
Net interest income after benefit for credit losses	5,600	5,512
Investment gains, net	342	95
Fair value losses, net	(1,919)	(1,190)
Debt extinguishment gains, net	8	0
Fee and other income	308	4,355
Non-interest (loss) income	(1,261)	3,260
Administrative expenses:
Salaries and employee benefits	351	325
Professional services	271	242
Occupancy expenses	43	50
Other administrative expenses	58	55
Total administrative expenses	723	672
Foreclosed property expense (income)	473	(262)
Temporary Payroll Tax Cut Continuation Act of 2011 (“TCCA”) fees	382	322
Other expenses, net	3	131
Total expenses	1,581	863
Income before federal income taxes	2,758	7,909
Provision for federal income taxes	(870)	(2,584)
Net income	1,888	5,325
Other comprehensive income:
Changes in unrealized gains on available-for-sale securities, net of reclassification adjustments and taxes	(91)	372
Other	(1)	0
Total other comprehensive (loss) income	(92)	372
Total comprehensive income attributable to Fannie Mae	1,796	5,697
Net income attributable to Fannie Mae	1,888	5,325
Dividends available for distribution to senior preferred stockholder (Note 10)	(1,796)	(5,692)
Net income (loss) attributable to common stockholders (Note 10)	$ 92	$ (367)
Earnings (loss) per share, Basic (in dollars per share)	$ 0.02	$ (0.06)
Earnings (loss) per share, Diluted (in dollars per share)	$ 0.02	$ (0.06)
Weighted-average common shares outstanding, Basic	5,762	5,762
Weighted-average common of shares outstanding, Diluted	5,893	5,762