cm:Concept: us-gaap:FinancialDesignationPredecessorAndSuccessorFixedList
| Financial Designation, Predecessor and Successor [Fixed List] |
| us-gaap:FinancialDesignationPredecessorAndSuccessorFixedList |
| Indicates designation of financial information when substantially all business or separately identifiable line of business transfers from one entity to another entity. Acceptable values are "Predecessor" and "Successor". |
| cm:Concept |
| us-types:financialDesignationType |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:FinancialDesignationPredecessorAndSuccessorFixedList |