| Standard label: | Derivative Instruments and Hedges, Liabilities, Noncurrent |
| Name: | us-gaap:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent |
| Documentation: | Fair value of liability arising from contracts that meet the criteria of being accounted for as derivative instruments, financial instrument or contract used to mitigate a specified risk (hedge), 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:DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent |
| Label | Role | Language |
| Derivative Instruments and Hedges, Liabilities, Noncurrent | http://www.xbrl.org/2003/role/label | en-US |
| Derivative Instruments and Hedges, Liabilities, Noncurrent, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| Part Of Roll Up: |
| us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent |