cm:Concept: us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteNatureOfAdjustments
| Business Combination, Provisional Information, Initial Accounting Incomplete, Nature of Adjustments |
| us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteNatureOfAdjustments |
| This element represents a description of the nature of any measurement period adjustments (as defined) realized during the reporting period to the assets, liabilities, equity interests, or items of consideration for which the initial accounting was incomplete in connection with a business combination. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteNatureOfAdjustments |