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The total amount of energy transported, in MWh, is as follows: (Details) - MW
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 22,340 20,259 19,401
Industrial [Member]      
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 20,447 18,612 [1] 17,723
Commercial [Member]      
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 1,535 1,300 1,320
Rural [Member]      
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 44 32 17
Public Authorities [Member]      
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 4
Concessionaires [Member]      
IfrsStatementLineItems [Line Items]      
Total amount of energy transported 310 315 341
[1] Data not audited by external auditors