cm:Concept: us-gaap:ExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisition
| Extended Product Warranty Accrual, Additions from Business Acquisition |
| us-gaap:ExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisition |
| Liability for an extended product warranty acquired in a business acquisition. Does not include any liability for a standard warranty acquired in a business acquisition. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:ExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisition |