cm:Concept: us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage
| Property, Plant and Equipment, Salvage Value, Percentage |
| us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage |
| Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. |
| cm:Concept |
| Percent (num:percentItemType) |
| As Of (instant) |
| (no balance type) |
| false |
| us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage |