Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income:
Trading securities	$ 1,627	$ 1,336	$ 706
Available-for-sale securities	175	230	335
Mortgage loans	116,764	114,605	108,319
Interest Income, Federal Funds Sold and Securities Purchased under Agreements to Resell	843	742	373
Other	163	136	123
Total interest income	119,572	117,049	109,856
Interest expense:
Short-term debt	(501)	(468)	(250)
Long-term debt	(98,109)	(95,630)	(88,873)
Total interest expense	(98,610)	(96,098)	(89,123)
Net interest income	20,962	20,951	20,733
Benefit for credit losses	4,011	3,309	2,041
Net interest income after benefit for credit losses	24,973	24,260	22,774
Non-interest Income:
Investment gains, net	1,770	952	1,522
Fair value losses, net	(2,214)	1,121	(1,211)
Fee and other income	1,176	979	2,227
Non-interest income	732	3,052	2,538
Administrative expenses:
Salaries and employee benefits	(1,486)	(1,451)	(1,328)
Professional services	(967)	(1,032)	(933)
Other administrative expenses	(570)	(576)	(476)
Total administrative expenses	(3,023)	(3,059)	(2,737)
Foreclosed property expense	(515)	(617)	(521)
Temporary Payroll Tax Cut Continuation Act of 2011 (“TCCA”) fees	(2,432)	(2,284)	(2,096)
Other expenses, net	(2,158)	(1,253)	(1,511)
Total expenses	(8,128)	(7,213)	(6,865)
Income before federal income taxes	17,577	20,099	18,447
Provision for federal income taxes	(3,417)	(4,140)	(15,984)
Total comprehensive income
Changes in unrealized gains on available-for-sale securities, net of reclassification adjustments and taxes	(179)	(344)	(206)
Other, (net of taxes of $0, $0 and $3, respectively)	(12)	(4)	0
Total other comprehensive loss	(191)	(348)	(206)
Total comprehensive income attributable to Fannie Mae	13,969	15,611	2,257
Net income attributable to Fannie Mae	14,160	15,959	2,463
Dividends distributed or amounts attributable to senior preferred stock	(13,969)	(12,613)	(8,944)
Net income (loss) attributable to common stockholders	$ 191	$ 3,346	$ (6,481)
Earnings (loss) per share: Basic	$ 0.03	$ 0.58	$ (1.12)
Earnings (loss) per share: Diluted	$ 0.03	$ 0.57	$ (1.12)
Weighted Average Number of Shares Outstanding, Basic	5,762	5,762	5,762
Weighted-average common shares outstanding: Diluted	5,893	5,893	5,762