cm:Concept: us-gaap:PropertyPlantAndEquipmentIncomeStatementDisclosures
| Property, Plant and Equipment Income Statement Disclosures |
| us-gaap:PropertyPlantAndEquipmentIncomeStatementDisclosures |
| Disclosure of property, plant and equipment income statement elements which may include depreciation, depletion and amortization expense and gains and losses on disposition of long lived assets used in the production of revenue. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:PropertyPlantAndEquipmentIncomeStatementDisclosures |