| Standard label: | Targeted or Tracking Stock, Issuance Date |
| Name: | us-gaap:TargetedOrTrackingStockIssuanceDates |
| Documentation: | Date the targeted stock was issued, in CCYY-MM-DD format. |
| Object type: | cm:Concept |
| Data type: | Date (xbrli:dateItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:TargetedOrTrackingStockIssuanceDates |
| Label | Role | Language |
| Targeted or Tracking Stock, Issuance Date | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |