cm:Concept: us-gaap:BusinessCombinationAcquiredReceivablesDescription
| Business Combination, Acquired Receivables, Description |
| us-gaap:BusinessCombinationAcquiredReceivablesDescription |
| This element represents a narrative description of the nature of receivables acquired in a business combination (as defined) including the nature of the receivables (such as loans, capital leases), the fair value of the acquired receivables, the gross contractual amount to be collected, and the amount estimated to be doubtful of collection, if any. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:BusinessCombinationAcquiredReceivablesDescription |