Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 21,184	$ 25,557
Restricted cash (includes $33,294 and $17,849, respectively, related to consolidated trusts)	40,223	23,866
Federal funds sold and securities purchased under agreements to resell or similar arrangements	13,578	32,938
Investments in securities:
Trading, at fair value (includes $3,037 and $3,061, respectively, pledged as collateral)	48,123	41,867
Available-for-sale, at fair value	2,404	3,429
Total investments in securities	50,527	45,296
Mortgage loans:
Loans Receivable Held-for-sale, Amount	6,773	7,701
Financing Receivable, before Allowance for Credit Loss (includes $7,825 and $8,922, respectively, at fair value)	3,336,405	3,255,897
Allowance for loan losses	(9,016)	(14,203)
Total loans held for investment, net of allowance	3,327,389	3,241,694
Total mortgage loans	3,334,162	3,249,395
Deferred tax assets, net	11,910	13,188
Accrued interest receivable, net (includes $8,172 and $7,928, respectively, related to consolidated trusts)	8,604	8,490
Acquired property, net	2,366	2,584
Other assets	20,765	17,004
Total assets	3,503,319	3,418,318
Liabilities:
Accrued interest payable (includes $9,361 and $9,133, respectively, related to consolidated trusts)	10,228	10,211
Other liabilities (includes $376 and $356, respectively, related to consolidated trusts)	11,097	9,947
Total liabilities	3,488,711	3,412,078
Commitments and contingencies (Note 16)	0	0
Fannie Mae stockholders’ equity:
Senior preferred stock (liquidation preference of $131,178 and $123,836, respectively)	120,836	120,836
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	(118,776)	(127,335)
Accumulated other comprehensive income	131	322
Treasury stock, at cost, 150,675,136 shares	(7,400)	(7,400)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	14,608	6,240
Total liabilities and equity	3,503,319	3,418,318
Fannie Mae [Member]
Mortgage loans:
Financing Receivable, before Allowance for Credit Loss (includes $7,825 and $8,922, respectively, at fair value)	94,911	113,039
Liabilities:
Debt (includes $5,687 and $6,826, respectively, of debt of Fannie Mae and $21,880 and $23,753, respectively, of debt of consolidated trusts, at fair value)	182,247	232,074
Consolidated Trusts [Member]
ASSETS
Restricted cash (includes $33,294 and $17,849, respectively, related to consolidated trusts)	33,294	17,849
Mortgage loans:
Financing Receivable, before Allowance for Credit Loss (includes $7,825 and $8,922, respectively, at fair value)	3,241,494	3,142,858
Accrued interest receivable, net (includes $8,172 and $7,928, respectively, related to consolidated trusts)	8,172	7,928
Liabilities:
Accrued interest payable (includes $9,361 and $9,133, respectively, related to consolidated trusts)	9,361	9,133
Debt (includes $5,687 and $6,826, respectively, of debt of Fannie Mae and $21,880 and $23,753, respectively, of debt of consolidated trusts, at fair value)	3,285,139	3,159,846
Other liabilities (includes $376 and $356, respectively, related to consolidated trusts)	$ 376	$ 356