cm:Concept: us-gaap:IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic
| Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership and General Partnership Unit, Basic, Net of Tax |
| us-gaap:IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic |
| Per unit ownership amount of income (loss) from continuing operations, after tax, available to each outstanding limited partnership and general partnership unit. |
| cm:Concept |
| Share (num:perShareItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasic |