Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows provided by (used in) operating activities:
Net income	$ 17,408	$ 12,923	$ 22,176
Reconciliation of net income to net cash provided by (used in) operating activities:
Amortization of cost basis adjustments	(2,535)	(5,731)	(10,763)
Net impact of hedged mortgage assets and debt	210	(423)	(268)
Provision (benefit) for credit losses	(1,670)	6,277	(5,130)
Valuation (gains) losses	(760)	361	(1,996)
Change in expected credit enhancement recoveries	193	(727)	194
Deferred income tax expense (benefit)	1,231	(195)	252
Net gains related to the disposition of acquired property and preforeclosure sales, including credit enhancements	(1,182)	(1,782)	(1,780)
Net change in accrued interest receivable	(1,110)	(1,826)	(618)
Net change in servicer advances	31	(217)	(2,131)
Net change in accrued interest payable	1,014	731	(533)
Other, net	130	(352)	825
Net change in trading securities	(1,077)	34,787	46,983
Net cash provided by (used in) operating activities	11,883	43,826	47,211
Mortgage loans acquired held for investment:
Purchases	(124,372)	(247,016)	(649,238)
Proceeds from sales	2,182	7,501	17,130
Proceeds from repayments	336,336	500,324	1,104,270
Advances to lenders	(103,364)	(178,450)	(393,016)
Proceeds from disposition of acquired property and preforeclosure sales	4,622	2,694	3,536
Net change in federal funds sold and securities purchased under agreements to resell	(16,135)	6,178	7,457
Other, net	(119)	(1,103)	711
Net cash provided by (used in) investing activities	99,150	90,128	90,850
Cash flows provided by (used in) financing activities:
Other, net	0	0	69
Net cash provided by (used in) financing activities	(130,168)	(154,744)	(145,053)
Net increase (decrease) in cash, cash equivalents and restricted cash and cash equivalents	(19,135)	(20,790)	(6,992)
Cash, cash equivalents and restricted cash and cash equivalents at beginning of period	87,841	108,631	115,623
Cash, cash equivalents and restricted cash and cash equivalents at end of period	68,706	87,841	108,631
Cash paid during the period for:
Interest	118,897	101,469	106,205
Income taxes	2,750	3,511	5,500
Fannie Mae
Cash flows provided by (used in) financing activities:
Proceeds from the issuance of debt	415,790	340,708	317,867
Payments to redeem debt	(427,161)	(403,967)	(405,368)
Consolidated Trusts
Cash flows provided by (used in) financing activities:
Proceeds from the issuance of debt	228,976	469,955	1,097,497
Payments to redeem debt	$ (347,773)	$ (561,440)	$ (1,155,118)