cm:Concept: us-gaap:NoncashOrPartNoncashAcquisitionInterestAcquired1
| Noncash or Part Noncash Acquisition, Interest Acquired |
| us-gaap:NoncashOrPartNoncashAcquisitionInterestAcquired1 |
| The level of ownership or equity interest acquired in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. |
| cm:Concept |
| Percent (num:percentItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:NoncashOrPartNoncashAcquisitionInterestAcquired1 |