| Standard label: | Environmental Remediation Contingency [Domain] |
| Name: | us-gaap:EnvironmentalRemediationContingencyDomain |
| Documentation: | Environmental remediation contingency, for example, but not limited to, asbestos, air emissions and mercury emissions. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:EnvironmentalRemediationContingencyDomain |
| Label | Role | Language |
| Environmental Remediation Contingency [Domain] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 410 30 50 10 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 410 |