| Standard label: | Public Utilities, Allowance for Funds Used During Construction, Additions |
| Name: | us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions |
| Documentation: | Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions |
| Label | Role | Language |
| Public Utilities, Allowance for Funds Used During Construction, Additions | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 980 340 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |
| FASB Accounting Standards Codification 980 360 25 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 980 |
| Part Of Roll Up: |
| us-gaap:NonoperatingIncomeExpense |
| us-gaap:AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities |