cm:Concept: us-gaap:WeightedAverageNumerDilutedLimitedPartnershipUnitsOutstandingAdjustment
| Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment |
| us-gaap:WeightedAverageNumerDilutedLimitedPartnershipUnitsOutstandingAdjustment |
| The sum of dilutive potential limited partnership units used in the calculation of the diluted per-unit computation. |
| cm:Concept |
| Shares (xbrli:sharesItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:WeightedAverageNumerDilutedLimitedPartnershipUnitsOutstandingAdjustment |