cm:Concept: us-gaap:SaleLeasebackTransactionCircumstancesRequiringContinuingInvolvement
| Sale Leaseback Transaction, Circumstances Requiring Continuing Involvement |
| us-gaap:SaleLeasebackTransactionCircumstancesRequiringContinuingInvolvement |
| Instances where future commitments are required by the seller-lessee in a transaction involving the sale of property to another party and the lease of the property back to the seller. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:SaleLeasebackTransactionCircumstancesRequiringContinuingInvolvement |