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Interest in joint ventures (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of interests in joint ventures
                             
 Percentage interest held in capital stock and votes     Corporate purpose     Legal address     Equity attributable to the owners     (Loss) Income from interest in joint ventures 
      12.31.23    12.31.22    12.31.23    12.31.22     12.31.21 
                               
 SACME  50.00%    Control of the operation of both the electric power generation and transmission in the GBA     Av. España 3251, CABA                57               66              (10)              (17)                12