cm:Concept: us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
| Line of Credit Facility, Current Borrowing Capacity |
| us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity |
| Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity |