cm:Concept: us-gaap:EmbeddedDerivativeDescriptionOfHostContract
| Embedded Derivative, Description of Host Contract |
| us-gaap:EmbeddedDerivativeDescriptionOfHostContract |
| Identification of the host contract (such as a debt instrument, lease, an agreement to settle payments in other than the functional currency), description of the terms of the contract, and discussion of a hybrid instrument with an embedded feature which is separated from the host contract and accounted for as a derivative. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:EmbeddedDerivativeDescriptionOfHostContract |