| Standard label: | Description of Regulatory Assets and Liabilities |
| Name: | us-gaap:DescriptionOfRegulatoryAssetsAndLiabilities |
| Documentation: | Describes a general nature of regulatory assets and liabilities. May include such items as what the assets and liabilities relate to and how recorded. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DescriptionOfRegulatoryAssetsAndLiabilities |
| Label | Role | Language |
| Description of Regulatory Assets and Liabilities | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 980 340 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |
| FASB Accounting Standards Codification 980 405 25 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |