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GROUP STRUCTURE (Details 6) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Share capital $ 36 $ 36  
Profit (loss) of the year $ 305 $ 457 $ 238
Compania De Inversiones De Energia S A [Member]      
IfrsStatementLineItems [Line Items]      
Main activity Investment    
Date Dec. 31, 2023    
Share capital $ 1    
Profit (loss) of the year 15    
Equity $ 540    
Direct and indirect participation 50.00%    
Joint ventures CIESA    
Compania Inversora En Transmision Electrica Citelec S A [Member]      
IfrsStatementLineItems [Line Items]      
Main activity Investment    
Date Dec. 31, 2023    
Share capital $ 1    
Profit (loss) of the year 4    
Equity $ 164    
Direct and indirect participation 50.00%    
Joint ventures Citelec    
C T B [Member]      
IfrsStatementLineItems [Line Items]      
Main activity Generation    
Date Dec. 31, 2023    
Share capital $ 11    
Profit (loss) of the year (15)    
Equity $ 500    
Direct and indirect participation 50.00%    
Joint ventures CTB    
Oleoducto De Crudos Pesados [Member]      
IfrsStatementLineItems [Line Items]      
Joint ventures OCP    
Main activity Investment    
Date Dec. 31, 2023    
Share capital $ 100    
Profit (loss) of the year 17    
Equity $ 114    
Direct and indirect participation 34.08%    
Transportadora De Gas Del Sur S A [Member]      
IfrsStatementLineItems [Line Items]      
Joint ventures TGS    
Main activity Gas transportation    
Date Dec. 31, 2023    
Share capital $ 1    
Profit (loss) of the year 29    
Equity $ 1,058    
Direct and indirect participation 1.029%