cm:Concept: us-gaap:StandardProductWarrantyDescription
| Standard Product Warranty Description |
| us-gaap:StandardProductWarrantyDescription |
| Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:StandardProductWarrantyDescription |