cm:Concept: us-gaap:ValueAddedTaxReceivableCurrent
| Value Added Tax Receivable, Current |
| us-gaap:ValueAddedTaxReceivableCurrent |
| Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:ValueAddedTaxReceivableCurrent |