| Standard label: | Capital Unit, Class [Domain] |
| Name: | us-gaap:CapitalUnitClassDomain |
| Documentation: | Description of the type or class of capital units or capital shares. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CapitalUnitClassDomain |
| Label | Role | Language |
| Capital Unit, Class [Domain] | 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(a)) | http://fasb.org/us-gaap/role/ref/legacyRef | 946 |