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Loans, financing, debentures and derivative financial instruments - Summary of Foreign Loan Maturity (Detail)
€ in Thousands, R$ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
BRL (R$)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
BRL (R$)
Dec. 31, 2020
BRL (R$)
Dec. 31, 2019
BRL (R$)
Disclosure of detailed information about borrowings [line items]            
Loan maturity, amount   R$ 11,750,361   R$ 16,377,643 R$ 17,376,216 R$ 14,392,722
IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Loan maturity, amount € 9,793 R$ 1,216,340 $ 222,665      
Cost in percentage of DI 106.70% 106.70% 106.70%      
Charges [member] | IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Loan maturity, amount [1] € 84 R$ 7,386 $ 1,326      
Cost in percentage of DI [1] 0.00% 0.00% 0.00%      
Foreign loan one [member] | IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Borrowings, maturity date Mar/2023          
Loan maturity, amount € 9,709 R$ 54,072 $ 0      
Cost in percentage of DI 111.60% 111.60% 111.60%      
Foreign loan two [member] | IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Borrowings, maturity date Sept/2023          
Loan maturity, amount € 0 R$ 313,062 $ 60,000      
Cost in percentage of DI 105.00% 105.00% 105.00%      
Foreign loan three [member] | IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Borrowings, maturity date Sept/2023          
Loan maturity, amount € 0 R$ 339,151 $ 65,000      
Cost in percentage of DI 104.80% 104.80% 104.80%      
Foreign loan four [member] | IPP [member] | Foreign loans [member]            
Disclosure of detailed information about borrowings [line items]            
Borrowings, maturity date Sept/2025          
Loan maturity, amount € 0 R$ 502,669 $ 96,339      
Cost in percentage of DI 108.50% 108.50% 108.50%      
[1] Includes interest, transaction costs and mark to market.