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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of significant accounting policies [Abstract]  
Schedule of Estimated Useful Lives
The estimated useful lives are as follows:
       
   
%
    
Mainly %
  
Office furniture and equipment
  
6-33
    
33
  
Photovoltaic plants in Spain
  
4
    
4
  
Photovoltaic plants in Italy
  
5
    
5
  
Anaerobic digestion plants in the Netherlands
  
8
    
8
  
Leasehold improvements
  
Over the shorter of the lease period or the life of the asset
    
7