cm:Concept: us-gaap:CapitalLeasesFutureMinimumPaymentsDueInThreeYears
| Capital Leases, Future Minimum Payments Due in Three Years |
| us-gaap:CapitalLeasesFutureMinimumPaymentsDueInThreeYears |
| Amount of minimum lease payments for capital leases due 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) |
| Credit |
| false |
| us-gaap:CapitalLeasesFutureMinimumPaymentsDueInThreeYears |