cm:Level1TextBlock: us-gaap:InvestmentHoldingsScheduleOfInvestmentsTextBlock
| Investment Holdings, Schedule of Investments [Text Block] |
| us-gaap:InvestmentHoldingsScheduleOfInvestmentsTextBlock |
| The entire disclosure for investment holdings. This includes the information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments. |
| cm:Level1TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:InvestmentHoldingsScheduleOfInvestmentsTextBlock |