v3.25.1
Financial instruments - Fair value of loans and financing (Details) - Loans, financing and debentures - BRL (R$)
R$ in Thousands
 3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities, at fair value R$ 93,036,064 R$ 98,802,972
Bonds | Foreign countries | Fixed    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal Secondary Market  
Financial liabilities, at fair value R$ 44,487,544 48,734,909
Export credits (“export prepayments”) | Foreign countries | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal SOFR  
Financial liabilities, at fair value R$ 21,383,389 22,740,891
Assets Financing | Foreign countries | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal SOFR  
Financial liabilities, at fair value R$ 395,806 422,115
Assets Financing | Country of domicile | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 58,807 60,566
ECA - Export Credit Agency | Foreign countries | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal SOFR  
Financial liabilities, at fair value R$ 859,549 864,202
IFC - International Finance Corporation | Foreign countries | SOFR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal SOFR  
Financial liabilities, at fair value R$ 6,233,706 6,261,715
Panda Bonds (1) | Foreign countries | Fixed    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal Fixed  
Financial liabilities, at fair value R$ 973,163 951,125
BNDES – TJLP [Member] | Country of domicile | BNDES – TJLP    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 159,443 171,109
BNDES – TLP [Member] | Country of domicile | BNDES – TLP    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 3,329,356 3,275,012
BNDES | Country of domicile | BNDES – SELIC    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 635,999 645,139
BNDES – TR | Country of domicile | BNDES – TR    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 34,070 33,466
BNDES - US$ | Country of domicile | BNDES - US$    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 2  
Financial liabilities, at fair value R$ 104,408 106,966
Debentures | Country of domicile | CDI/IPCA    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1/IPCA  
Financial liabilities, at fair value R$ 12,127,177 12,002,992
NCE ("Export Credit Notes") | Country of domicile | CDI    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 107,507 108,308
NCR ("Rural Credit Notes") | Country of domicile | CDI    
Disclosure of detailed information about financial instruments [line items]    
Description of valuation techniques used to measure fair value less costs of disposal DI 1  
Financial liabilities, at fair value R$ 2,146,140 R$ 2,424,457