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1 Operations (Details 4) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Jun. 28, 2018
Disclosure of detailed information about business combination [line items]    
Percentage of interest transferred 100.00%  
Consideration amount R$ 133,739  
Concession rights 20,030  
Fair Value [Member]    
Disclosure of detailed information about business combination [line items]    
Consideration amount R$ 113,709 R$ 113,709