cm:Concept: us-gaap:InvestmentsInAndAdvancesToAffiliatesAmountOfEquity
| Investments in and Advances to Affiliates, Amount of Equity |
| us-gaap:InvestmentsInAndAdvancesToAffiliatesAmountOfEquity |
| Amount of Equity in net profit and loss for the period. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:InvestmentsInAndAdvancesToAffiliatesAmountOfEquity |