cm:Concept: us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties
| Proceeds from Collection of Long-term Loans to Related Parties |
| us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties |
| The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:ProceedsFromCollectionOfLongtermLoansToRelatedParties |