cm:Concept: us-gaap:RevenueFromContractWithCustomerProductAndServiceExtensibleList
| Revenue from Contract with Customer, Product and Service [Extensible List] |
| us-gaap:RevenueFromContractWithCustomerProductAndServiceExtensibleList |
| Indicates product and service for revenue from satisfaction of performance obligation by transferring promised product and service to customer. |
| cm:Concept |
| srt-types:extensibleListItemType |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:RevenueFromContractWithCustomerProductAndServiceExtensibleList |