| Standard label: | Unrealized Loss on Price Risk Cash Flow Derivatives, before Tax |
| Name: | us-gaap:UnrealizedLossOnPriceRiskCashFlowDerivativesBeforeTax |
| Documentation: | Amount of unrealized loss related to the decrease in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, before taxes, to the extent that the cash flow hedge is determined to be effective. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:UnrealizedLossOnPriceRiskCashFlowDerivativesBeforeTax |
| Label | Role | Language |
| Unrealized Loss on Price Risk Cash Flow Derivatives, before Tax | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 4C (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |
| FASB Accounting Standards Codification 815 30 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |
| Part Of Roll Up: |
| us-gaap:UnrealizedGainLossOnPriceRiskCashFlowDerivativesBeforeTax |