cm:Concept: us-gaap:CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears
| Capital Leases, Future Minimum Payments, Receivable in Three Years |
| us-gaap:CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears |
| Amount of minimum lease payments to be received by the lessor for capital leases in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears |