Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 32,110	$ 25,224
Restricted cash (includes $22,132 and $31,536, respectively, related to consolidated trusts)	28,150	36,953
Federal funds sold and securities purchased under agreements to resell or similar arrangements	19,470	30,415
Investments in securities:
Trading, at fair value (includes $747 and $1,277, respectively, pledged as collateral)	34,679	40,562
Available-for-sale, at fair value (includes $87 and $107, respectively, related to consolidated trusts)	4,843	8,363
Total investments in securities	39,522	48,925
Mortgage loans:
Loans held for sale, at lower of cost or fair value	4,988	2,899
Loans held for investment, at amortized cost (includes $10,596 and $12,057, respectively, at fair value)	3,192,621	3,100,319
Allowance for loan losses	(19,084)	(23,465)
Total loans held for investment, net of allowance	3,173,537	3,076,854
Total mortgage loans	3,178,525	3,079,753
Deferred tax assets, net	17,350	33,530
Accrued interest receivable, net (includes $7,560 and $7,064, respectively, related to consolidated trusts)	8,133	7,737
Acquired property, net	3,220	4,489
Other assets	19,049	20,942
Total assets	3,345,529	3,287,968
Liabilities:
Accrued interest payable (includes $8,598 and $8,285, respectively, related to consolidated trusts)	9,682	9,431
Other liabilities (includes $492 and $390, respectively, related to consolidated trusts)	9,479	10,150
Total liabilities	3,349,215	3,281,897
Commitments and contingencies (Note 16)	0	0
Fannie Mae stockholders’ equity (deficit):
Senior preferred stock, 1,000,000 shares issued and outstanding	117,149	117,149
Preferred stock, 700,000,000 shares are authorized— 555,374,922 shares issued and outstanding	19,130	19,130
Common stock, no par value, no maximum authorization—1,308,762,703 shares issued and 1,158,087,567 and 1,158,082,750 shares outstanding, respectively	687	687
Accumulated deficit	(133,805)	(124,253)
Accumulated other comprehensive income	553	759
Treasury stock, at cost, 150,675,136 and 150,679,953 shares, respectively	(7,400)	(7,401)
Total stockholders’ equity (deficit) (See Note 1: Senior Preferred Stock Purchase Agreement, Senior Preferred Stock and Warrant for information on our dividend obligation to Treasury)	(3,686)	6,071
Total liabilities and equity (deficit)	3,345,529	3,287,968
Fannie Mae [Member]
Mortgage loans:
Loans held for investment, at amortized cost (includes $10,596 and $12,057, respectively, at fair value)	162,809	204,318
Liabilities:
Debt (includes $8,186 and $9,582, respectively, of debt of Fannie Mae and $30,493 and $36,524, respectively, of debt of consolidated trusts, at fair value)	276,752	327,097
Consolidated Trusts [Member]
ASSETS
Restricted cash (includes $22,132 and $31,536, respectively, related to consolidated trusts)	22,132	31,536
Investments in securities:
Available-for-sale, at fair value (includes $87 and $107, respectively, related to consolidated trusts)	87	107
Mortgage loans:
Loans held for investment, at amortized cost (includes $10,596 and $12,057, respectively, at fair value)	3,029,812	2,896,001
Accrued interest receivable, net (includes $7,560 and $7,064, respectively, related to consolidated trusts)	7,560	7,064
Liabilities:
Accrued interest payable (includes $8,598 and $8,285, respectively, related to consolidated trusts)	8,598	8,285
Debt (includes $8,186 and $9,582, respectively, of debt of Fannie Mae and $30,493 and $36,524, respectively, of debt of consolidated trusts, at fair value)	3,053,302	2,935,219
Other liabilities (includes $492 and $390, respectively, related to consolidated trusts)	$ 492	$ 390