cm:Concept: us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities
| Increase (Decrease) in Employee Related Liabilities |
| us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities |
| The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities |