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Changes in the Group structure - Main acquisitions and divestments (Details)
customer in Millions
1 Months Ended
Dec. 01, 2020
item
customer
MW
Feb. 28, 2020
Nov. 30, 2020
Mar. 31, 2020
Adani Gas Limited        
Main acquisitions and divestments        
Percentage of interest acquired   37.40%    
Uganda Lake Albert development project        
Main acquisitions and divestments        
Percentage of rights acquired     33.30%  
Block CA1        
Main acquisitions and divestments        
Percentage of interest sold       86.95%
EDP Comercializadora Espagne        
Main acquisitions and divestments        
Number of customers in portfolio of acquired entity | customer 2      
Number of gas-fired combined cycle power plants acquired | item 2      
Capacity gas-fired combined cycle plants acquired | MW 850