| Standard label: | Investment Company, Total Return |
| Name: | us-gaap:InvestmentCompanyTotalReturn |
| Documentation: | Percentage increase (decrease) in fund net asset value, assuming reinvestment of dividends and capital gain distributions. |
| Object type: | cm:Concept |
| Data type: | Percent (num:percentItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:InvestmentCompanyTotalReturn |
| Label | Role | Language |
| Investment Company, Total Return | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 205 50 18 | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 205 50 19 | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 205 50 20 | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |