| Standard label: | Capital Units by Class [Axis] |
| Name: | us-gaap:CapitalUnitsByClassAxis |
| Documentation: | Information by type or class of the entity's capital units. |
| Object type: | cm:Axis |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CapitalUnitsByClassAxis |
| Label | Role | Language |
| Capital Units by Class [Axis] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 946 205 50 7 | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |
| FASB Accounting Standards Codification 946 210 S99 1 (SX 210.6-04.16) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |