cm:Member: us-gaap:ForeignLineOfCreditMember
| Foreign Line of Credit [Member] |
| us-gaap:ForeignLineOfCreditMember |
| Contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars, outside the reporting entity's home country. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:ForeignLineOfCreditMember |