cm:Concept: us-gaap:AcquiredFiniteLivedIntangibleAssetResidualValue
| Acquired Finite-lived Intangible Asset, Residual Value |
| us-gaap:AcquiredFiniteLivedIntangibleAssetResidualValue |
| The aggregate expected value at the end of their useful life of a major finite-lived intangible asset class acquired during the period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:AcquiredFiniteLivedIntangibleAssetResidualValue |