| Standard label: | Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings, Description of Potential Risks |
| Name: | us-gaap:RepurchaseAgreementsSecuritiesLendingTransactionsAndRepurchaseToMaturityTransactionsAccountedForAsSecuredBorrowingsDescriptionOfPotentialRisks |
| Documentation: | Description of potential risks associated with the agreements and related collateral pledged, including obligations arising from a decline in the fair value of the collateral pledged and how risks are managed. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:RepurchaseAgreementsSecuritiesLendingTransactionsAndRepurchaseToMaturityTransactionsAccountedForAsSecuredBorrowingsDescriptionOfPotentialRisks |
| Label | Role | Language |
| Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings, Description of Potential Risks | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 30 50 7 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |