cm:Member: us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleMember
       
          
          | Discontinued Operations, Disposed of by Means Other than Sale [Member] | 
       
       
          
          | us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleMember | 
       
       
          
          | Component or group of components disposed of by means other than sale and representing a strategic shift that has or will have a major effect on operations and financial results. | 
       
       
          
          | cm:Member | 
       
       
          
          | [Member] (nonnum:domainItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | (no balance type) | 
       
       
          
          | true | 
       
       
          
          | us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleMember |