cm:Concept: us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation
| Partners' Capital Account, Unit-based Payment Arrangement, Number of Units |
| us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation |
| Number of units issued for unit-based payment arrangement issued by partnership. Partner includes, but is not limited to, general, limited and preferred partners. |
| cm:Concept |
| Shares (xbrli:sharesItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation |