| Standard label: | Capital Units, Cost to Investors |
| Name: | us-gaap:CapitalUnitsTotalCostToInvestors |
| Documentation: | Cost to investors of each class of capital shares or other capital units. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CapitalUnitsTotalCostToInvestors |
| Label | Role | Language |
| Capital Units, Cost to Investors | 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)(1)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |