cm:Concept: us-gaap:DescriptionOfDeferredCostsRelatedToLongTermContracts
       
          
          | Description of Deferred Costs Related to Long-term Contracts | 
       
       
          
          | us-gaap:DescriptionOfDeferredCostsRelatedToLongTermContracts | 
       
       
          
          | The description of deferred costs for long-term contracts and programs as of the balance sheet date. Examples include initial tooling and deferred production costs. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Text/String (xbrli:stringItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | (no balance type) | 
       
       
          
          | false | 
       
       
          
          | us-gaap:DescriptionOfDeferredCostsRelatedToLongTermContracts |