Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and Cash Equivalents	$ 38,337	$ 21,184
Restricted Cash (includes $68,308 and $33,294, respectively, related to consolidated trusts)	77,286	40,223
Federal funds sold and securities purchased under agreements to resell or similar arrangements	28,200	13,578
Investments in securities:
Trading, at fair value (includes $6,544 and $3,037, respectively, pledged as collateral)	136,542	48,123
Available-for-sale, at fair value	1,697	2,404
Total investments in securities	138,239	50,527
Mortgage loans:
Mortgage loans held for sale	5,197	6,773
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	3,659,247	3,336,405
Allowance for loan losses	(10,552)	(9,016)
Total loans held for investment, net of allowance	3,648,695	3,327,389
Total mortgage loans	3,653,892	3,334,162
Advance to Lender	10,449	6,453
Deferred Income Tax Assets, Net	12,947	11,910
Interest Receivable	9,937	8,604
Acquired property, net	1,261	2,366
Other assets	15,201	14,312
Total assets	3,985,749	3,503,319
Liabilities:
Interest Payable	9,719	10,228
Other Liabilities	15,035	11,097
Total liabilities	3,960,490	3,488,711
Commitments and contingencies (Note 16)	0	0
Fannie Mae stockholders’ equity:
Senior Preferred Stock Value	120,836	120,836
Preferred Stock, Value, Issued	19,130	19,130
Common Stock, Value, Issued	687	687
Accumulated deficit	(108,110)	(118,776)
Accumulated other comprehensive income	116	131
Treasury Stock, Value	(7,400)	(7,400)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	25,259	14,608
Total liabilities and equity	3,985,749	3,503,319
SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member]
Mortgage loans:
Interest Receivable	216
Consolidated Trusts [Member]
ASSETS
Restricted Cash (includes $68,308 and $33,294, respectively, related to consolidated trusts)	68,308	33,294
Investments in securities:
Trading, at fair value (includes $6,544 and $3,037, respectively, pledged as collateral)	793	896
Mortgage loans:
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	3,546,521	3,241,494
Interest Receivable	9,635	8,172
Liabilities:
Interest Payable	8,955	9,361
Debt (includes $3,728 and $5,687, respectively, of debt of Fannie Mae and $24,586 and $21,880, respectively, of debt of consolidated trusts, at fair value)	3,646,164	3,285,139
Other Liabilities	1,523	376
Fannie Mae [Member]
Mortgage loans:
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	112,726	94,911
Liabilities:
Debt (includes $3,728 and $5,687, respectively, of debt of Fannie Mae and $24,586 and $21,880, respectively, of debt of consolidated trusts, at fair value)	$ 289,572	$ 182,247