| Standard label: | Energy Marketing Contract Liabilities, Noncurrent |
| Name: | us-gaap:EnergyMarketingContractLiabilitiesNoncurrent |
| Documentation: | Fair value of liability arising from energy marketing activities (trading activities), expected to be settled after one year or beyond the normal operating cycle, if longer. Examples of energy marketing activities include, but are not limited to, trading of electricity, coal, natural gas and oil using financial instruments, including, but not limited to, forward contracts, options and swaps. |
| 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:EnergyMarketingContractLiabilitiesNoncurrent |
| Label | Role | Language |
| Energy Marketing Contract Liabilities, Noncurrent | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| Part Of Roll Up: |
| us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent |