| Standard label: | Alternative Investment, Valuation Technique [Extensible List] |
| Name: | us-gaap:AlternativeInvestmentValuationTechniqueExtensibleList |
| Documentation: | Indicates valuation technique for measuring alternative investment. |
| 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:AlternativeInvestmentValuationTechniqueExtensibleList |
| Label | Role | Language |
| Alternative Investment, Valuation Technique [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 |
| FASB Accounting Standards Codification 825 10 50 31 | http://www.xbrl.org/2003/role/disclosureRef | 825 |