cm:Concept: us-gaap:ChangeInAccountingPrincipleAccountingStandardsUpdateTransitionOptionElectedFixedList
       
          
          | Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Fixed List] | 
       
       
          
          | us-gaap:ChangeInAccountingPrincipleAccountingStandardsUpdateTransitionOptionElectedFixedList | 
       
       
          
          | Indicates transition method applied for adoption of accounting standards update. Acceptable values are "Retrospective", "Prospective", "Modified Retrospective" and "Modified Prospective". | 
       
       
          
          | cm:Concept | 
       
       
          
          | us-types:transitionOptionType | 
       
       
          
          | As Of (instant) | 
       
       
          
          | (no balance type) | 
       
       
          
          | false | 
       
       
          
          | us-gaap:ChangeInAccountingPrincipleAccountingStandardsUpdateTransitionOptionElectedFixedList |