| Standard label: | Capital Units, Deductions from Cost to Investors, Explanation |
| Name: | us-gaap:CapitalUnitsDeductionsFromTotalCostToInvestorsExplanation |
| Documentation: | Description of deductions from cost to investors of capital shares or other capital units for fees, loads and other charges. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CapitalUnitsDeductionsFromTotalCostToInvestorsExplanation |
| Label | Role | Language |
| Capital Units, Deductions from Cost to Investors, Explanation | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 210 S99 1 (SX 210.6-04.16(b)(3)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |