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Trade receivables (Tables)
12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of trade receivables
         
       12.31.23     12.31.22 
Current:          
Sales of electricity – Billed                   35,566                49,863
Receivables in litigation                       104                     893
Allowance for the impairment of trade receivables                  (6,241)              (14,431)
Subtotal                  29,429                36,325
           
Sales of electricity – Unbilled                  34,214                47,749
PBA & CABA government credit                    2,952                  3,087
Fee payable for the expansion of the transportation and others                          2                        6
Total current                  66,597                87,167
Schedule of allowance for the impairment of trade receivables
         
  Note    12.31.23     12.31.22 
Balance at beginning of the year                  14,431                36,435
Increase                    6,606                  6,794
Decrease                  (1,566)                  (978)
Recovery - Agreement on the Regularization of Obligations  2.c                          -                (8,252)
Result from exposure to inflation                (13,230)              (19,568)
Balance at end of the year                    6,241                14,431
Schedule of aging analysis of trade receivables
         
       12.31.23     12.31.22 
Past due                32,454              26,759
Up to 3 months                34,143              60,408
Total trade receivables                  66,597                87,167
Schedule of sensitivity analysis
     
 - 5% increase in the uncollectibility rate estimate       
       12.31.23 
 Allowance                     6,553
 Variation                        312
       
 - 5% decrease in the uncollectibility rate estimate       
       12.31.23 
 Allowance                     5,928
 Variation                     (313)