| Standard label: | Asset Retirement Obligation, Accretion Expense |
| Name: | us-gaap:AssetRetirementObligationAccretionExpense |
| Documentation: | Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. |
| 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:AssetRetirementObligationAccretionExpense |
| Label | Role | Language |
| Asset Retirement Obligation, Accretion Expense | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 410 20 50 1 (c)(3) | http://fasb.org/us-gaap/role/ref/legacyRef | 410 |
| FASB Accounting Standards Codification 410 20 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 410 |
| Part Of Roll Up: |
| us-gaap:AccretionExpenseIncludingAssetRetirementObligations |