| Standard label: | Pledged Assets, Not Separately Reported, Nonsecuritized Investments |
| Name: | us-gaap:PledgedAssetsNotSeparatelyReportedNonsecuritizedInvestments |
| Documentation: | The carrying amount, as of the date of the latest financial statement presented, of investments which are not evidenced by ownership of securities, such as interests in partnerships or other forms of unincorporated entities, but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PledgedAssetsNotSeparatelyReportedNonsecuritizedInvestments |
| Label | Role | Language |
| Pledged Assets, Not Separately Reported, Nonsecuritized Investments | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 30 50 1A (b)(1)(i) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |
| Part Of Roll Up: |
| us-gaap:PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition |