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Risk Management (Details 10) - BRL (R$)
R$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]        
Borrowings and financing R$ 18,958,671 R$ 17,723,836 R$ 17,258,624 R$ 13,244,709
Trade payables and contractors 430,946 236,763    
Services payable 723,242 469,027    
Program contract commitments 112,385 122,647    
Public-Private Partnership - PPP 2,959,181 3,060,185    
Fair Values [Member]        
IfrsStatementLineItems [Line Items]        
Borrowings and financing 19,260,133 17,947,954    
Trade payables and contractors 430,946 236,763    
Services payable 723,242 469,027    
Program contract commitments 112,385 122,647    
Public-Private Partnership - PPP R$ 2,959,181 R$ 3,060,185