cm:Concept: us-gaap:NoncashOrPartNoncashAcquisitionEmployeeBenefitLiabilitiesAssumed1
| Noncash or Part Noncash Acquisition, Employee Benefit Liabilities Assumed |
| us-gaap:NoncashOrPartNoncashAcquisitionEmployeeBenefitLiabilitiesAssumed1 |
| The amount of employee benefit liabilities that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:NoncashOrPartNoncashAcquisitionEmployeeBenefitLiabilitiesAssumed1 |