| Standard label: | Price Risk Derivative Assets, at Fair Value |
| Name: | us-gaap:PriceRiskDerivativeAssetsAtFairValue |
| Documentation: | Fair value as of the balance sheet date of price risk derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets on the balance sheet. |
| 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:PriceRiskDerivativeAssetsAtFairValue |
| Label | Role | Language |
| Price Risk Derivative Assets, at Fair Value | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| Part Of Roll Up: |
| us-gaap:PriceRiskDerivativesAtFairValueNet |