cm:Concept: us-gaap:InsuranceSettlementsReceivableNoncurrent
| Insurance Settlements Receivable, Noncurrent |
| us-gaap:InsuranceSettlementsReceivableNoncurrent |
| Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:InsuranceSettlementsReceivableNoncurrent |