cm:Concept: us-gaap:VariableInterestEntitySimilarEntityAggregationDescription
| Variable Interest Entity, Similar Entity Aggregation, Description |
| us-gaap:VariableInterestEntitySimilarEntityAggregationDescription |
| Describes how the entity aggregates Variable Interest Entities (VIE) for disclosure purposes, distinguishing between (a) VIEs that are not consolidated because the enterprise is not the primary beneficiary but has a variable interest and (b) VIEs that are consolidated. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:VariableInterestEntitySimilarEntityAggregationDescription |