cm:Concept: us-gaap:InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings
       
          
          | Inventory, Net of Allowances, Customer Advances and Progress Billings | 
       
          
          | us-gaap:InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings | 
       
          
          | Amount, after deduction of valuation reserves, other allowances, and customer advances received on long-term contracts or programs, of inventory expected to be converted to cash, sold or exchanged within the normal operating cycle. | 
       
          
          | cm:Concept | 
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
          
          | As Of (instant) | 
       
          
          | Debit | 
       
          
          | false | 
       
          
          | us-gaap:InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings |