Deposits - Narrative (Details)	Jun. 30, 2026	Dec. 31, 2025
Deposits [Abstract]
Interest-bearing demand and overnight deposits as percentage of deposits	99.40%	99.40%

Percentage of interest-bearing domestic deposit liabilities to total deposit liabilities.

No definition available.

Name:	us-gaap_PercentageOfInterestBearingDomesticDepositsToDeposits
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant