Statements of Capital - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 9,451	$ 9,831	$ 8,751
Comprehensive income (loss)	1,091	1,065	899
Proceeds from issuance of capital stock	11,139	8,516	11,087
Repurchases/redemptions of capital stock	(10,476)	(9,399)	(10,460)
Net shares reclassified (to) from mandatorily redeemable capital stock	(143)	(1)	(4)
Cash dividends on capital stock	(575)	(561)	(442)
Ending Balance	10,487	9,451	9,831
Retained Earnings, Unrestricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,413	2,242	1,915
Comprehensive income (loss)	705	732	769
Cash dividends on capital stock	(575)	(561)	(442)
Ending Balance	2,543	2,413	2,242
Retained Earnings, Restricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	1,078	896	703
Comprehensive income (loss)	176	182	193
Ending Balance	1,254	1,078	896
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3,491	3,138	2,618
Comprehensive income (loss)	881	914	962
Cash dividends on capital stock	(575)	(561)	(442)
Ending Balance	3,797	3,491	3,138
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(29)	(180)	(117)
Comprehensive income (loss)	210	151	(63)
Ending Balance	$ 181	$ (29)	$ (180)
Common Class B [Member] | Capital Stock (putable) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (shares)	60	69	63
Beginning Balance	$ 5,989	$ 6,873	$ 6,250
Proceeds from issuance of capital stock (shares)	111	85	111
Proceeds from issuance of capital stock	$ 11,139	$ 8,516	$ 11,087
Repurchases/redemptions of capital stock (shares)	(105)	(94)	(105)
Repurchases/redemptions of capital stock	$ (10,476)	$ (9,399)	$ (10,460)
Net shares reclassified (to) from mandatorily redeemable capital stock (shares)	(1)	0	0
Net shares reclassified (to) from mandatorily redeemable capital stock	$ (143)	$ (1)	$ (4)
Balance (shares)	65	60	69
Ending Balance	$ 6,509	$ 5,989	$ 6,873