cm:Member: us-gaap:InvestmentsBySecondaryCategorizationDomain
| Investments by Secondary Categorization [Domain] |
| us-gaap:InvestmentsBySecondaryCategorizationDomain |
| Investments in the "Investment Holdings [Table]" and the "Summary of Investment Holdings [Table]" are often categorized at two levels. The first categorization is the investment type. The second categorization can vary. The usual secondary categorizations are industry, country or geography. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:InvestmentsBySecondaryCategorizationDomain |