cm:Concept: us-gaap:CapitalLeasesOfLessorContingentRentalsDescriptionOfVariableRateBasis
| Capital Leases of Lessor, Contingent Rentals, Description of Variable Rate Basis |
| us-gaap:CapitalLeasesOfLessorContingentRentalsDescriptionOfVariableRateBasis |
| The reference rate for the variable rate of the lessor's capital lease (sales-type and direct financing leases), such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:CapitalLeasesOfLessorContingentRentalsDescriptionOfVariableRateBasis |