Capital (Rollforward of MRCS) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
MRCS [Abstract]
MRCS, Beginning of Year	$ 9	$ 12	$ 15
Net Shares Reclassified to Mandatorily Redeemable Capital Stock, Value	143	1	4
Net Repayments for Repurchases/Redemption of Mandatorily Redeemable Capital Stock	(122)	(4)	(7)
MRCS, End of Year	$ 30	$ 9	$ 12

Amount that would be paid, determined under the conditions specified in the contract, if the holder of the share has the right to redeem the shares.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481648/480-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant