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8 CRC Transferred to the Parana State Government (Tables)
 12 Months Ended
Dec. 31, 2020
CRC Transferred To Parana State Government [Abstract]  
Schedule of changes in CRC
8.1 Changes in CRC
                 
Balance as of   Monetary    Balance as of   Monetary    Balance as of
January 1, 2019 Interest  variations  Amortizations  December 31, 2019 Interest  variations  Amortizations  December 31, 2020
1,445,042  87,710 96,519  (278,586) 1,350,685  80,788 261,176  (300,025) 1,392,624
                 
Current        219,236        287,789
Noncurrent       1,131,449       1,104,835
Schedule of maturity of noncurrent installments
8.2 Maturity of noncurrent installments
   
2022 306,928
2023 327,341
2024 349,111
2025 121,455
   1,104,835