Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents	$ 20,853	$ 32,110
Restricted cash (includes $22,774 and $22,132, respectively, related to consolidated trusts)	27,876	28,150
Federal funds sold and securities purchased under agreements to resell or similar arrangements	16,300	19,470
Investments in securities:
Trading, at fair value (includes $3,363 and $747, respectively, pledged as collateral)	42,381	34,679
Available-for-sale, at fair value	3,723	4,843
Total investments in securities	46,104	39,522
Mortgage loans:
Loans held for sale, at lower of cost or fair value	14,323	4,988
Loans held for investment, at amortized cost	3,211,113	3,192,621
Allowance for loan losses	(16,812)	(19,084)
Total loans held for investment, net of allowance	3,194,301	3,173,537
Total mortgage loans	3,208,624	3,178,525
Deferred tax assets, net	15,375	17,350
Accrued interest receivable, net (includes $7,702 and $7,560, respectively, related to consolidated trusts)	8,256	8,133
Acquired property, net	2,816	3,220
Other assets	17,160	19,049
Total assets	3,363,364	3,345,529
Liabilities:
Accrued interest payable (includes $8,751 and $8,598, respectively, related to consolidated trusts)	9,825	9,682
Other liabilities (includes $353 and $492, respectively, related to consolidated trusts)	8,591	9,479
Total liabilities	3,355,905	3,349,215
Commitments and contingencies (Note 14)	0	0
Fannie Mae stockholders’ equity (deficit):
Senior preferred stock, 1,000,000 shares issued and outstanding	120,836	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 shares outstanding	687	687
Accumulated deficit	(126,143)	(133,805)
Accumulated other comprehensive income	349	553
Treasury stock, at cost, 150,675,136 shares	(7,400)	(7,400)
Total stockholders’ equity (deficit) (See Note 1: Senior Preferred Stock Purchase Agreement and Senior Preferred Stock for information on our dividend obligation to Treasury)	7,459	(3,686)
Total liabilities and equity (deficit)	3,363,364	3,345,529
Fannie Mae [Member]
Mortgage loans:
Loans held for investment, at amortized cost	140,154	162,809
Liabilities:
Debt (includes $7,558 and $8,186, respectively, of debt of Fannie Mae at fair value and $26,675 and $30,493, respectively, of debt of consolidated trusts, at fair value)	250,690	276,752
Consolidated Trusts [Member]
Assets:
Restricted cash (includes $22,774 and $22,132, respectively, related to consolidated trusts)	22,774	22,132
Mortgage loans:
Loans held for investment, at amortized cost	3,070,959	3,029,812
Accrued interest receivable, net (includes $7,702 and $7,560, respectively, related to consolidated trusts)	7,702	7,560
Liabilities:
Accrued interest payable (includes $8,751 and $8,598, respectively, related to consolidated trusts)	8,751	8,598
Debt (includes $7,558 and $8,186, respectively, of debt of Fannie Mae at fair value and $26,675 and $30,493, respectively, of debt of consolidated trusts, at fair value)	3,086,799	3,053,302
Other liabilities (includes $353 and $492, respectively, related to consolidated trusts)	$ 353	$ 492