Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents	$ 18,916,000,000	$ 14,674,000,000
Restricted cash (includes $29,302 and $25,865, respectively, related to consolidated trusts)	33,873,000,000	30,879,000,000
Federal funds sold and securities purchased under agreements to resell or similar arrangements	17,550,000,000	27,350,000,000
Investments in securities:
Trading, at fair value (includes $1,200 and $135, respectively, pledged as collateral)	40,000,000,000	39,908,000,000
Available-for-sale, at fair value (includes $80 and $285, respectively, related to consolidated trusts)	16,983,000,000	20,230,000,000
Total investments in securities	56,983,000,000	60,138,000,000
Mortgage loans:
Loans held for sale, at lower of cost or fair value	4,639,000,000	5,361,000,000
Loans held for investment, at amortized cost	3,046,127,000,000	3,042,234,000,000
Allowance for loan losses	(25,819,000,000)	(27,951,000,000)
Total loans held for investment, net of allowance	3,020,308,000,000	3,014,283,000,000
Total mortgage loans	3,024,947,000,000	3,019,644,000,000
Deferred tax assets, net	37,048,000,000	37,187,000,000
Accrued interest receivable (includes $7,246 and $6,974, respectively, related to consolidated trusts)	7,978,000,000	7,726,000,000
Acquired property, net	6,188,000,000	6,766,000,000
Other assets	18,218,000,000	17,553,000,000
Total assets	3,221,701,000,000	3,221,917,000,000
Liabilities:
Accrued interest payable (includes $8,212 and $8,194, respectively, related to consolidated trusts)	9,909,000,000	9,794,000,000
Other liabilities (includes $408 and $448, respectively, related to consolidated trusts)	9,903,000,000	10,393,000,000
Total liabilities	3,219,582,000,000	3,217,858,000,000
Commitments and contingencies (Note 16)	0	0
Fannie Mae stockholders’ equity:
Senior preferred stock, 1,000,000 shares issued and outstanding	117,149,000,000	117,149,000,000
Preferred stock, 700,000,000 shares are authorized—555,374,922 shares issued and outstanding	19,130,000,000	19,130,000,000
Common stock, no par value, no maximum authorization—1,308,762,703 shares issued and 1,158,082,750 shares outstanding	687,000,000	687,000,000
Accumulated deficit	(128,665,000,000)	(126,942,000,000)
Accumulated other comprehensive income	1,207,000,000	1,407,000,000
Treasury stock, at cost, 150,679,953 shares	(7,401,000,000)	(7,401,000,000)
Total Fannie Mae stockholders’ equity	2,107,000,000	4,030,000,000
Noncontrolling interest	12,000,000	29,000,000
Total equity (See Note 1: Impact of U.S. Government Support for information on our dividend obligation to Treasury)	2,119,000,000	4,059,000,000
Total liabilities and equity	3,221,701,000,000	3,221,917,000,000
Fannie Mae [Member]
Mortgage loans:
Loans held for investment, at amortized cost	228,687,000,000	233,054,000,000
Allowance for loan losses	(24,557,000,000)	(26,510,000,000)
Total mortgage loans	208,752,000,000	211,887,000,000
Liabilities:
Debt (includes $10,901 and $11,133, respectively, of debt of Fannie Mae at fair value and $28,563 and $23,609, respectively, of debt of consolidated trusts, at fair value)	370,819,000,000	386,135,000,000
Consolidated Trusts [Member]
Assets:
Restricted cash (includes $29,302 and $25,865, respectively, related to consolidated trusts)	29,302,000,000	25,865,000,000
Investments in securities:
Available-for-sale, at fair value (includes $80 and $285, respectively, related to consolidated trusts)	80,000,000	285,000,000
Mortgage loans:
Loans held for investment, at amortized cost	2,817,440,000,000	2,809,180,000,000
Allowance for loan losses	(1,262,000,000)	(1,441,000,000)
Total mortgage loans	2,816,195,000,000	2,807,757,000,000
Accrued interest receivable (includes $7,246 and $6,974, respectively, related to consolidated trusts)	7,246,000,000	6,974,000,000
Liabilities:
Accrued interest payable (includes $8,212 and $8,194, respectively, related to consolidated trusts)	8,212,000,000	8,194,000,000
Debt (includes $10,901 and $11,133, respectively, of debt of Fannie Mae at fair value and $28,563 and $23,609, respectively, of debt of consolidated trusts, at fair value)	2,828,951,000,000	2,811,536,000,000
Other liabilities (includes $408 and $448, respectively, related to consolidated trusts)	$ 408,000,000	$ 448,000,000