| Standard label: | Multiemployer Plan Number |
| Name: | us-gaap:MultiemployerPlanNumber |
| Documentation: | Three digit plan number for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. |
| Object type: | cm:Concept |
| Data type: | us-types:threeDigitItemType |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:MultiemployerPlanNumber |
| Label | Role | Language |
| Multiemployer Plan Number | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 715 80 50 5 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 715 |