Consolidated Obligations - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Debt Disclosure [Abstract]
FHLB system outstanding consolidated obligations	$ 1,300,000,000	$ 1,200,000,000
Discount notes maturity period	1 year

Amount outstanding, before the effects of recovery, of obligation under the joint and several liability arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

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