| Standard label: | Recorded Third-Party Environmental Recoveries, Amount |
| Name: | us-gaap:RecordedThirdPartyEnvironmentalRecoveriesAmount |
| Documentation: | Recorded amount of the individual components comprising the asset for third-party recoveries related to environmental remediation obligations. |
| 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:RecordedThirdPartyEnvironmentalRecoveriesAmount |
| Label | Role | Language |
| Recorded Third-Party Environmental Recoveries, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 410 30 45 1 | http://www.xbrl.org/2003/role/disclosureRef | 410 |