cm:Concept: us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations
| Contractual Interest Expense on Prepetition Liabilities Not Recognized in Statement of Operations |
| us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations |
| The amount of contractual interest expense on prepetition liabilities not included in the statement of operations. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations |