Statements of Capital - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 10,487	$ 9,451
Total Comprehensive Income	266	275
Proceeds from issuance of capital stock	4,081	2,026
Repurchases/redemptions of capital stock	(3,251)	(2,284)
Cash dividends on capital stock	(146)	(138)
Ending Balance	11,384	9,329
Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value	53	1
Retained Earnings, Unrestricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,543	2,413
Total Comprehensive Income	188	164
Cash dividends on capital stock	(146)	(138)
Ending Balance	2,585	2,439
Retained Earnings, Restricted [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	1,254	1,078
Total Comprehensive Income	48	41
Ending Balance	1,302	1,119
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3,797	3,491
Total Comprehensive Income	236	205
Cash dividends on capital stock	(146)	(138)
Ending Balance	3,887	3,558
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	181	(29)
Total Comprehensive Income	30	70
Ending Balance	211	41
Common Class B [Member] | Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 6,509	$ 5,989
BALANCE (shares)	65	60
Proceeds from issuance of capital stock	$ 4,081	$ 2,026
Proceeds from issuance of capital stock (shares)	41	20
Repurchases/redemptions of capital stock	$ (3,251)	$ (2,284)
Repurchases/redemptions of capital stock (shares)	(32)	(23)
BALANCE (shares)	73	57
Ending Balance	$ 7,286	$ 5,730
Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Shares	1	0
Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value	$ 53	$ 1