| Standard label: | Public Utilities, Property, Plant and Equipment, Amount of Disallowed Costs for Recently Completed Plant |
| Name: | us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAmountOfDisallowedCostsForRecentlyCompletedPlant |
| Documentation: | Amount of disallowed costs for rate making purposes for recently completed plants in regulated industries. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAmountOfDisallowedCostsForRecentlyCompletedPlant |
| Label | Role | Language |
| Public Utilities, Property, Plant and Equipment, Amount of Disallowed Costs for Recently Completed Plant | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 980 360 S99 2 (SAB Topic 10.E) | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |
| FASB Accounting Standards Codification 980 360 35 12 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |