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33 Financial Results (Tables)
12 Months Ended
Dec. 31, 2020
Financial Result [Abstract]  
Schedule of financial results
    Restated Restated
  12.31.2020 12.31.2019 12.31.2018
Financial income      
Recognition of tax credit (Note 13.2.1) 944,549 38,434 55,096
Interest and monetary variation of CRC transfer (Note 8.1) 341,964 192,724  214,627
Arrears charges on bills 271,966 215,522  210,466
Return on financial investments 80,704 119,622 98,424
Exchange variation on loan collateral 35,089  -  -
Derivatives fair value - forward contract (Note 35.2.3 - b) 24,511  -  -
Remuneration of net sectorial assets and liabilities (Note 9.2) 20,168 47,378 43,966
Monetary variation over the Itaipu power purchase 42,729 26,332 24,658
Monetary variation and adjust to present value of accounts       
 payable related to the concession (Note 26.1) 2,322 1,462 1,047
Other financial income 75,666 88,032  148,823
   1,839,668 729,506  797,107
( - ) Financial expenses      
Monetary and exchange variation and debt charges 607,569 853,880  829,728
Monetary variation and adjust to present value of accounts       
 payable related to the concession (Note 26.1) 192,848 100,455 94,319
Monetary variation over the Itaipu power purchase 75,478 29,547 50,203
Interest on R&D and EEP (Note 25.2) 12,550 24,570 25,407
Remuneration of net sectorial assets and liabilities (Note 9.2) 62 5,753 23,747
Interest and monetary variation of CRC transfer (Note 8.1)  - 8,495 25,830
PIS/Pasep/Cofins taxes on interest on capital 27,748 71,549 13,636
Other financial expenses 57,142 90,621  147,382
  973,397  1,184,870 1,210,252
Net 866,271  (455,364) (413,145)