cm:Concept: us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesExecutoryCosts
| Capital Leases, Net Investment in Direct Financing Leases, Executory Costs |
| us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesExecutoryCosts |
| Estimated remaining costs to be incurred to service the direct financing lease, such as taxes, maintenance and insurance and the profit thereon, that are included in the minimum lease payments. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesExecutoryCosts |