Segment Reporting - Schedule of Segment Reporting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 29,423	$ 29,587	$ 24,866
Fee and other income	312	361	462
Net revenues	29,735	29,948	25,328
Investment gains (losses), net	(297)	1,352	907
Fair value gains (losses), net	1,284	155	(2,501)
Administrative expenses	(3,329)	(3,065)	(3,068)
Benefit (provision) for credit losses	(6,277)	5,130	(678)
TCCA fees	(3,369)	(3,071)	(2,673)
Credit enhancement expense	(1,323)	(1,051)	(1,361)
Change in expected credit enhancement recoveries	727	(194)	233
Other expenses, net	(918)	(1,255)	(1,308)
Income before federal income taxes	16,233	27,949	14,879
Provision for federal income taxes	(3,310)	(5,773)	(3,074)
Net income	12,923	22,176	11,805
US Treasury
Segment Reporting Information [Line Items]
TCCA fees	(3,369)	(3,071)	(2,673)
Operating Segments | Single-Family
Segment Reporting Information [Line Items]
Net interest income	24,736	25,429	21,502
Fee and other income	224	269	368
Net revenues	24,960	25,698	21,870
Investment gains (losses), net	(223)	1,392	728
Fair value gains (losses), net	1,364	167	(2,539)
Administrative expenses	(2,789)	(2,557)	(2,559)
Benefit (provision) for credit losses	(5,029)	4,600	(75)
Credit enhancement expense	(1,062)	(812)	(1,141)
Change in expected credit enhancement recoveries	470	(86)	89
Other expenses, net	(778)	(1,208)	(1,212)
Income before federal income taxes	13,544	24,123	12,488
Provision for federal income taxes	(2,774)	(4,996)	(2,607)
Net income	10,770	19,127	9,881
Operating Segments | Multifamily
Segment Reporting Information [Line Items]
Net interest income	4,687	4,158	3,364
Fee and other income	88	92	94
Net revenues	4,775	4,250	3,458
Investment gains (losses), net	(74)	(40)	179
Fair value gains (losses), net	(80)	(12)	38
Administrative expenses	(540)	(508)	(509)
Benefit (provision) for credit losses	(1,248)	530	(603)
Credit enhancement expense	(261)	(239)	(220)
Change in expected credit enhancement recoveries	257	(108)	144
Other expenses, net	(140)	(47)	(96)
Income before federal income taxes	2,689	3,826	2,391
Provision for federal income taxes	(536)	(777)	(467)
Net income	2,153	3,049	1,924
Operating Segments | US Treasury | Single-Family
Segment Reporting Information [Line Items]
TCCA fees	(3,369)	(3,071)	(2,673)
Operating Segments | US Treasury | Multifamily
Segment Reporting Information [Line Items]
TCCA fees	$ 0	$ 0	$ 0