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33 Financial Results (Tables)
12 Months Ended
Dec. 31, 2019
Financial Result [Abstract]  
Schedule of financial results
  12.31.2019 12.31.2018 12.31.2017
Financial income      
Arrears charges on bills   225,956    226,050    191,554
Interest and monetary variation of CRC transfer (Note 8.1)   192,724    214,627    141,923
Return on financial investments   126,510   98,841    114,523
Remuneration of net sectorial assets and liabilities (Note 9.2)   47,378   43,966   20,493
Monetary variation over the Itaipu power purchase   26,332   24,658   17,777
Recognition of tax credit (33.1)   38,434   55,096 -
Monetary variation and adjust to present value of accounts      
   payable related to the concession (Note 26.1) 1,462 1,047   10,813
Other financial income   91,445    149,630    202,227
    750,241    813,915    699,310
( - ) Financial expenses      
Monetary and exchange variation and debt charges   906,952    871,397    993,970
Monetary variation and adjust to present value of accounts      
   payable related to the concession (Note 26.1)   100,455   94,319   65,418
Monetary variation over the Itaipu power purchase   29,547   50,203   12,264
Interest on R&D and EEP (Note 25.2)   24,570   25,407   34,345
Interest and monetary variation of CRC transfer (Note 8.1) 8,495   25,830   51,211
Remuneration of net sectorial assets and liabilities (Note 9.2) 5,753   23,747   29,622
PIS/Pasep/Cofins taxes on interest on capital   71,549   13,636   45,196
Other financial expenses   91,406    147,426    215,724
    1,238,727    1,251,965    1,447,750
Net (488,486)   (438,050)   (748,440)