| Standard label: | Equity Option [Member] |
| Name: | us-gaap:StockOptionMember |
| Documentation: | Contracts conveying rights, but not obligations, to buy or sell a specific quantity of stock at a specified price during a specified period (an American option) or at a specified date (a European option). |
| 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:StockOptionMember |
| Label | Role | Language |
| Equity Option [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |