| Standard label: | Environmental Costs Recognized, Capitalized in Period |
| Name: | us-gaap:EnvironmentalCostsRecognizedCapitalizedInPeriod |
| Documentation: | Amount of environmental remediation costs capitalized. These expenditures may relate to long-lived improvements in operating facilities. |
| 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:EnvironmentalCostsRecognizedCapitalizedInPeriod |
| Label | Role | Language |
| Environmental Costs Recognized, Capitalized in Period | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 410 30 25 18 | http://fasb.org/us-gaap/role/ref/legacyRef | 410 |