cm:Member: us-gaap:MultiemployerPlanPlanInformationDomain
| Multiemployer Plan, Plan Information [Domain] |
| us-gaap:MultiemployerPlanPlanInformationDomain |
| Identifies multiemployer plans that have plan level information available in the public domain and multiemployer plans that do not have plan level information available in the public domain. A multiemployer plan is 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. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:MultiemployerPlanPlanInformationDomain |