cm:Level1TextBlock: us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock
| Business Description and Accounting Policies [Text Block] |
| us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock |
| The entire disclosure for the business description and accounting policies concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Accounting policies describe all significant accounting policies of the reporting entity. |
| cm:Level1TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock |
| BusinessDescriptionAndAccountingPoliciesDisclosure |