cm:Level3TextBlock: us-gaap:ScheduleOfNoncashOrPartNoncashDivestituresTextBlock
| Schedule of Noncash or Part Noncash Divestitures [Table Text Block] |
| us-gaap:ScheduleOfNoncashOrPartNoncashDivestituresTextBlock |
| Tabular disclosure of the sale of an asset or business through a noncash (or part noncash) transaction. It may include the nature and purpose of the divesture, as well as the asset divested of and the noncash consideration received (that is, debt, stock, and so forth.) Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. |
| cm:Level3TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ScheduleOfNoncashOrPartNoncashDivestituresTextBlock |
| NoncashOrPartNoncashDivestitures |