cm:Concept: us-gaap:LineOfCreditFacilityBorrowingCapacityDescription
| Line of Credit Facility, Borrowing Capacity, Description |
| us-gaap:LineOfCreditFacilityBorrowingCapacityDescription |
| Description of the credit facility's borrowing capacity including discussion of how the borrowing capacity is determined (for example, borrowing capacity based on the amount of current assets). |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LineOfCreditFacilityBorrowingCapacityDescription |