| Standard label: | Distribution and Shareholder Service [Member] |
| Name: | us-gaap:DistributionAndShareholderServiceMember |
| Documentation: | Distribution and shareholder assistance. Distribution assistance includes, but is not limited to, marketing and selling fund shares, advertising, printing and mailing of prospectus and sale literature to investor. Shareholder assistance includes, but is not limited to, answering shareholder inquiry and providing shareholder with investment information. |
| 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:DistributionAndShareholderServiceMember |
| Label | Role | Language |
| Distribution and Shareholder Service [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 606 10 55 91 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 606 |