| Standard label: | Price Risk Derivative Instruments Not Designated as Hedging Instruments, at Fair Value, Net |
| Name: | us-gaap:PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet |
| Documentation: | Fair value as of the balance sheet date of all price risk derivatives not designated as hedging instruments. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet |
| Label | Role | Language |
| Price Risk Derivative Instruments Not Designated as Hedging Instruments, at Fair Value, Net | http://www.xbrl.org/2003/role/label | en-US |
| Price Risk Derivative Instruments Not Designated as Hedging Instruments, at Fair Value, Net, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 45 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |