| Standard label: | Schedule of Environmental Exit Cost [Table] |
| Name: | us-gaap:ScheduleOfEnvironmentalExitCostTable |
| Documentation: | Table setting forth material liabilities for remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal or abandonment of a property as a result of unanticipated contamination of the assets. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfEnvironmentalExitCostTable |
| Label | Role | Language |
| Schedule of Environmental Exit Cost [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 450 20 S99 1 (SAB Topic 5.Y.Q4) | http://fasb.org/us-gaap/role/ref/legacyRef | 450 |