cm:Concept: us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPBusinessCombinationAccountingTreatment
| Limited Liability Company (LLC) or Limited Partnership (LP), Business Combination Accounting Treatment |
| us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPBusinessCombinationAccountingTreatment |
| Description of the method of accounting for the transfer of net assets or exchange of equity interests. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPBusinessCombinationAccountingTreatment |