cm:Concept: us-gaap:LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases
| Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases |
| us-gaap:LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases |
| The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases |