| Standard label: | Investment Company, Total Return, Gain (Loss) on Investment Not Meeting Investment Requirement |
| Name: | us-gaap:InvestmentCompanyTotalReturnGainLossOnInvestmentNotMeetingInvestmentRequirement |
| Documentation: | Percentage of increase (decrease) in fund net asset value from gain (loss) on investments not meeting investment requirements. |
| 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:InvestmentCompanyTotalReturnGainLossOnInvestmentNotMeetingInvestmentRequirement |
| Label | Role | Language |
| Investment Company, Total Return, Gain (Loss) on Investment Not Meeting Investment Requirement | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 20 50 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |