cm:Concept: us-gaap:BasisOfFinancialStatementPresentationInChapter11
| Basis of Financial Statement Presentation in Chapter 11 |
| us-gaap:BasisOfFinancialStatementPresentationInChapter11 |
| Description of the basis of the financial statement presentation, including the method for determining value of liabilities subject to compromise, of an entity that has filed for bankruptcy protection under Chapter 11. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:BasisOfFinancialStatementPresentationInChapter11 |