Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 25,224	$ 14,674
Restricted cash (includes $31,536 and $25,865, respectively, related to consolidated trusts)	36,953	30,879
Federal funds sold and securities purchased under agreements to resell or similar arrangements	30,415	27,350
Investments in securities:
Trading, at fair value (includes $1,277 and $135, respectively, pledged as collateral)	40,562	39,908
Available-for-sale, at fair value (includes $107 and $285, respectively, related to consolidated trusts)	8,363	20,230
Total investments in securities	48,925	60,138
Mortgage loans:
Loans held for sale, at lower of cost or fair value	2,899	5,361
Loans held for investment, at amortized cost (includes $12,057 and $14,075, respectively, at fair value)	3,100,319	3,042,234
Allowance for loan losses	(23,465)	(27,951)
Total loans held for investment, net of allowance	3,076,854	3,014,283
Total mortgage loans	3,079,753	3,019,644
Deferred tax assets, net	33,530	37,187
Accrued interest receivable, net (includes $7,064 and $6,974, respectively, related to consolidated trusts)	7,737	7,726
Acquired property, net	4,489	6,766
Other assets	20,942	17,553
Total assets	3,287,968	3,221,917
Liabilities:
Accrued interest payable (includes $8,285 and $8,194, respectively, related to consolidated trusts)	9,431	9,794
Other liabilities (includes $390 and $448, respectively, related to consolidated trusts)	10,150	10,393
Total liabilities	3,281,897	3,217,858
Commitments and contingencies (Note 18)	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	(124,253)	(126,942)
Accumulated other comprehensive income	759	1,407
Treasury stock, at cost, 150,679,953 shares	(7,401)	(7,401)
Total Fannie Mae stockholders’ equity	6,071	4,030
Noncontrolling interest	0	29
Total equity (See Note 1: Senior Preferred Stock and Warrant Issued to Treasury and Earnings (Loss) per Share for information on our dividend obligation to Treasury)	6,071	4,059
Total liabilities and equity	3,287,968	3,221,917
Fannie Mae [Member]
Mortgage loans:
Loans held for investment, at amortized cost (includes $12,057 and $14,075, respectively, at fair value)	204,318	233,054
Allowance for loan losses	(22,579)	(26,510)
Total mortgage loans	184,611	211,887
Liabilities:
Debt (includes $9,582 and $11,133, respectively, of debt of Fannie Mae and $36,524 and $23,609, respectively, of debt of consolidated trusts, at fair value)	327,097	386,135
Consolidated Trusts [Member]
ASSETS
Restricted cash (includes $31,536 and $25,865, respectively, related to consolidated trusts)	31,536	25,865
Investments in securities:
Available-for-sale, at fair value (includes $107 and $285, respectively, related to consolidated trusts)	107	285
Mortgage loans:
Loans held for investment, at amortized cost (includes $12,057 and $14,075, respectively, at fair value)	2,896,001	2,809,180
Allowance for loan losses	(886)	(1,441)
Total mortgage loans	2,895,142	2,807,757
Accrued interest receivable, net (includes $7,064 and $6,974, respectively, related to consolidated trusts)	7,064	6,974
Liabilities:
Accrued interest payable (includes $8,285 and $8,194, respectively, related to consolidated trusts)	8,285	8,194
Debt (includes $9,582 and $11,133, respectively, of debt of Fannie Mae and $36,524 and $23,609, respectively, of debt of consolidated trusts, at fair value)	2,935,219	2,811,536
Other liabilities (includes $390 and $448, respectively, related to consolidated trusts)	$ 390	$ 448