| Standard label: | Electric Transmission [Member] |
| Name: | us-gaap:ElectricTransmissionMember |
| Documentation: | System used for the electrical transmission of the bulk transport of high voltage power, typically over longer distances, between generating plants and distribution systems. Typically comprised of towers, overhead conductors, underground conduits, roads and trails. |
| 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:ElectricTransmissionMember |
| Label | Role | Language |
| Electric Transmission [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |