cm:Concept: us-gaap:EmbeddedDerivativeAccountingMethod
| Embedded Derivative, Accounting Method |
| us-gaap:EmbeddedDerivativeAccountingMethod |
| General discussion of the accounting for the embedded derivative separated from the host contract. May include discussion of where the derivative and the gain (loss) on the derivative are reported in the financial statements, and discussion of the analysis resulting in the bifurcation of the hybrid instrument. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:EmbeddedDerivativeAccountingMethod |