Cash and Due from Banks (Details) - USD ($) $ in Billions	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Cash and Cash Equivalents [Abstract]
Average balance maintained	$ 1.7	$ 0.9

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