cm:Concept: us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
| Cash Provided by (Used in) Investing Activities, Discontinued Operations |
| us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations |
| Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations |