cm:Concept: us-gaap:ProceedsFromSaleOfLeaseReceivables
       
          
          | Proceeds from Sale of Lease Receivables | 
       
       
          
          | us-gaap:ProceedsFromSaleOfLeaseReceivables | 
       
       
          
          | The cash inflow associated with the sale of receivables arising from the lease of real estate, equipment or other fixed assets for a specified time in exchange for payment, usually in the form of rent; excludes proceeds from sales-type lease transactions, which are classified as operating activities. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | For Period (duration) | 
       
       
          
          | Debit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:ProceedsFromSaleOfLeaseReceivables |