cm:Concept: us-gaap:ProceedsFromSalesOfAssetsInvestingActivities
| Proceeds from Sales of Assets, Investing Activities |
| us-gaap:ProceedsFromSalesOfAssetsInvestingActivities |
| Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:ProceedsFromSalesOfAssetsInvestingActivities |