| Standard label: | Proceeds from Interest and Dividends Received |
| Name: | us-gaap:ProceedsFromInterestAndDividendsReceived |
| Documentation: | Cash received for dividends and interest on the entity's equity and debt investments during the current period. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ProceedsFromInterestAndDividendsReceived |
| Label | Role | Language |
| Proceeds from Interest and Dividends Received | http://www.xbrl.org/2003/role/label | en-US |
| Proceeds from Interest and Dividends Received, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 16 (b) | http://www.xbrl.org/2003/role/disclosureRef | 230 |
| FASB Accounting Standards Codification 230 10 45 25 (b) | http://www.xbrl.org/2003/role/disclosureRef | 230 |
| Part Of Roll Up: |
| us-gaap:ProceedsFromOperatingActivities |