cm:Concept: us-gaap:DepreciationAmortizationAndAccretionNet
| Depreciation, Amortization and Accretion, Net |
| us-gaap:DepreciationAmortizationAndAccretionNet |
| The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:DepreciationAmortizationAndAccretionNet |