cm:Concept: us-gaap:SaleLeasebackTransactionTransactionCostsInvestingActivities
| Sale Leaseback Transaction, Transaction Costs, Investing Activities |
| us-gaap:SaleLeasebackTransactionTransactionCostsInvestingActivities |
| Amount of cash outflow for transaction costs in a sale-leaseback recognized in investing activities. Includes, but is not limited to, closing and debt issuance costs. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:SaleLeasebackTransactionTransactionCostsInvestingActivities |