cm:Concept: us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPPredecessorEntityIesToBusinessCombination
| Limited Liability Company (LLC) or Limited Partnership (LP), Predecessor Entity(ies) to Business Combination |
| us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPPredecessorEntityIesToBusinessCombination |
| Name and brief description of each predecessor entity included in the LLC or LP as a result of a net asset transfer or exchange of equity interests. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPPredecessorEntityIesToBusinessCombination |