Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents	$ 26,559	$ 14,674
Restricted cash (includes $37,856 and $25,865, respectively, related to consolidated trusts)	42,926	30,879
Federal funds sold and securities purchased under agreements to resell or similar arrangements	18,350	27,350
Investments in securities:
Trading, at fair value (includes $1,191 and $135, respectively, pledged as collateral)	40,547	39,908
Available-for-sale, at fair value (includes $110 and $285, respectively, related to consolidated trusts)	9,865	20,230
Total investments in securities	50,412	60,138
Mortgage loans:
Loans held for sale, at lower of cost or fair value	3,405	5,361
Loans held for investment, at amortized cost	3,068,262	3,042,234
Allowance for loan losses	(22,706)	(27,951)
Total loans held for investment, net of allowance	3,045,556	3,014,283
Total mortgage loans	3,048,961	3,019,644
Deferred tax assets, net	35,101	37,187
Accrued interest receivable (includes $7,032 and $6,974, respectively, related to consolidated trusts)	7,728	7,726
Acquired property, net	5,041	6,766
Other assets	20,864	17,553
Total assets	3,255,942	3,221,917
Liabilities:
Accrued interest payable (includes $8,199 and $8,194, respectively, related to consolidated trusts)	9,512	9,794
Other liabilities (includes $392 and $448, respectively, related to consolidated trusts)	9,141	10,393
Total liabilities	3,251,766	3,217,858
Commitments and contingencies (Note 16)	0	0
Fannie Mae stockholders’ equity:
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 1,158,082,750 shares outstanding	687	687
Accumulated deficit	(126,312)	(126,942)
Accumulated other comprehensive income	923	1,407
Treasury stock, at cost, 150,679,953 shares	(7,401)	(7,401)
Total Fannie Mae stockholders’ equity	4,176	4,030
Noncontrolling interest	0	29
Total equity (See Note 1: Impact of U.S. Government Support for information on our dividend obligation to Treasury)	4,176	4,059
Total liabilities and equity	3,255,942	3,221,917
Fannie Mae [Member]
Mortgage loans:
Loans held for investment, at amortized cost	216,958	233,054
Allowance for loan losses	(21,858)	(26,510)
Total mortgage loans	198,497	211,887
Liabilities:
Debt (includes $10,460 and $11,133, respectively, of debt of Fannie Mae at fair value and $35,453 and $23,609, respectively, of debt of consolidated trusts, at fair value)	351,568	386,135
Consolidated Trusts [Member]
Assets:
Restricted cash (includes $37,856 and $25,865, respectively, related to consolidated trusts)	37,856	25,865
Investments in securities:
Available-for-sale, at fair value (includes $110 and $285, respectively, related to consolidated trusts)	110	285
Mortgage loans:
Loans held for investment, at amortized cost	2,851,304	2,809,180
Allowance for loan losses	(848)	(1,441)
Total mortgage loans	2,850,464	2,807,757
Accrued interest receivable (includes $7,032 and $6,974, respectively, related to consolidated trusts)	7,032	6,974
Liabilities:
Accrued interest payable (includes $8,199 and $8,194, respectively, related to consolidated trusts)	8,199	8,194
Debt (includes $10,460 and $11,133, respectively, of debt of Fannie Mae at fair value and $35,453 and $23,609, respectively, of debt of consolidated trusts, at fair value)	2,881,545	2,811,536
Other liabilities (includes $392 and $448, respectively, related to consolidated trusts)	$ 392	$ 448