Cash and Due from Banks (Details) - USD ($) $ in Billions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Average balance maintained	$ 1.5	$ 1.8

Average amount of collected cash balances with commercial banks the Federal Home Loan Banks (FHLBanks) maintain in return for certain services.

No definition available.

Name:	us-gaap_AverageCollectedCashBalancesWithCommercialBanksFederalHomeLoanBank
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration