cm:Concept: us-gaap:SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipBusinessPurpose
| Subsidiary of Limited Liability Company or Limited Partnership, Business Purpose |
| us-gaap:SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipBusinessPurpose |
| Description of business purpose of the subsidiary of the limited liability company or limited partnership, for example, its day-to-day operating functions and whether it acts as a holding or operating company. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipBusinessPurpose |