cm:Member: us-gaap:DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember
       
          
          | Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | 
       
       
          
          | us-gaap:DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember | 
       
       
          
          | Component or group of components classified as held-for-sale or disposed of by sale and representing a strategic shift that has or will have a major effect on operations and financial results. Includes a business or nonprofit activity on acquisition classified as held-for-sale. | 
       
       
          
          | cm:Member | 
       
       
          
          | [Member] (nonnum:domainItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | (no balance type) | 
       
       
          
          | true | 
       
       
          
          | us-gaap:DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember |