| Standard label: | Equity Securities, FV-NI, Change in Valuation Technique, Reason [Extensible List] |
| Name: | us-gaap:EquitySecuritiesFvNiChangeInValuationTechniqueReasonExtensibleList |
| Documentation: | Indicates reason valuation technique or approach changed for measuring investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). |
| Object type: | cm:Concept |
| Data type: | srt-types:extensibleListItemType |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:EquitySecuritiesFvNiChangeInValuationTechniqueReasonExtensibleList |
| Label | Role | Language |
| Equity Securities, FV-NI, Change in Valuation Technique, Reason [Extensible List] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 2 (bbb)(1) | http://www.xbrl.org/2003/role/disclosureRef | 820 |