cm:Concept: us-gaap:LimitedLiabilityCompanyOrLimitedPartnershipBusinessActivitiesAndDescription
| Limited Liability Company or Limited Partnership, Business Activities and Description |
| us-gaap:LimitedLiabilityCompanyOrLimitedPartnershipBusinessActivitiesAndDescription |
| Description of the day-to-day business function and activities of the limited liability company or limited partnership. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:LimitedLiabilityCompanyOrLimitedPartnershipBusinessActivitiesAndDescription |