cm:Concept: us-gaap:IntangibleAssetsNetIncludingGoodwill
| Intangible Assets, Net (Including Goodwill) |
| us-gaap:IntangibleAssetsNetIncludingGoodwill |
| Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:IntangibleAssetsNetIncludingGoodwill |