| Name | OfficeOfFinanceAssessmentsCostAssessedOnFederalHomeLoanBank |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Office of Finance, Cost Assessed on Federal Home Loan Bank | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Amount of a Federal Home Loan Bank's (FHLBank) proportionate share of the costs of operating the Office of Finance. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:IncomeStatementAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesFederalHomeLoanBanks |