| Standard label: | Allowance for Funds Used During Construction, Capitalized Interest |
| Name: | us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest |
| Documentation: | Amount capitalized of allowance for funds used during construction. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest |
| Label | Role | Language |
| Allowance for Funds Used During Construction, Capitalized Interest | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 980 835 25 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |