cm:Concept: us-gaap:VariableInterestEntityReasonForUnavailabilityOfInformation
| Variable Interest Entity, Unavailability of Information, Reasons |
| us-gaap:VariableInterestEntityReasonForUnavailabilityOfInformation |
| Description of the reason that the reporting entity, after making an exhaustive effort, is unable to obtain the information necessary to (1) determine whether the legal entity is a VIE, (2) determine whether it (the reporting entity) is the VIE's primary beneficiary, or (3) perform the accounting required to consolidate the VIE for which it is determined that it (the reporting entity) is the primary beneficiary. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:VariableInterestEntityReasonForUnavailabilityOfInformation |