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8 CRC Transferred to the Parana State Government (Details 1) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent R$ 1,131,449 R$ 1,254,166
2021 [Member]    
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent 233,817  
2022 [Member]    
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent 249,367  
2023 [Member]    
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent 265,951  
2024 [Member]    
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent 283,638  
After 2024 [Member]    
DisclosureOfChangesInCrcLineItems [Line Items]    
CRC transferred to the State Government of Parana noncurrent R$ 98,676