cm:Member: us-gaap:IndefiniteLivedIntangibleAssetsMajorClassNameDomain
| Indefinite-lived Intangible Assets, Major Class Name [Domain] |
| us-gaap:IndefiniteLivedIntangibleAssetsMajorClassNameDomain |
| The major class of indefinite-lived intangible asset (for example, trade names, etc. but not all-inclusive), excluding goodwill. 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 the company. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:IndefiniteLivedIntangibleAssetsMajorClassNameDomain |