v3.26.1
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Sensitivity analysis – exposure to interest rates – except for derivative financial instruments (Details)
R$ in Thousands
3 Months Ended
Dec. 31, 2025
BRL (R$)
Possible 25% | Cash and cash equivalents  
Disclosure of detailed information about financial instruments [line items]  
Financial assets R$ (2,979,974)
Possible 25% | Marketable securities  
Disclosure of detailed information about financial instruments [line items]  
Financial assets (106,832)
Possible 25% | Loans and financing  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities R$ (17,589,339)
Possible 25% | Interest rate risk [member]  
Disclosure of detailed information about financial instruments [line items]  
Sensitivity Analysis, Interest Rate, Percentage of Increase (Decrease) 25.00%
Possible 25% | Interest rate risk [member] | Cash and cash equivalents | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets R$ (119,364)
Possible 25% | Interest rate risk [member] | Marketable securities | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets (294,918)
Possible 25% | Interest rate risk [member] | Loans and financing | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (328,733)
Possible 25% | Interest rate risk [member] | Loans and financing | BNDES – TJLP  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (2,297)
Possible 25% | Interest rate risk [member] | Loans and financing | SOFR  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (243,766)
Remote 50% | Cash and cash equivalents  
Disclosure of detailed information about financial instruments [line items]  
Financial assets (5,959,949)
Remote 50% | Marketable securities  
Disclosure of detailed information about financial instruments [line items]  
Financial assets (213,665)
Remote 50% | Loans and financing  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities R$ (35,178,678)
Remote 50% | Interest rate risk [member]  
Disclosure of detailed information about financial instruments [line items]  
Sensitivity Analysis, Interest Rate, Percentage of Increase (Decrease) 50.00%
Remote 50% | Interest rate risk [member] | Cash and cash equivalents | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets R$ (238,728)
Remote 50% | Interest rate risk [member] | Marketable securities | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets (589,836)
Remote 50% | Interest rate risk [member] | Loans and financing | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (657,466)
Remote 50% | Interest rate risk [member] | Loans and financing | BNDES – TJLP  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (4,594)
Remote 50% | Interest rate risk [member] | Loans and financing | SOFR  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (487,533)
Probable (base value) | Cash and cash equivalents  
Disclosure of detailed information about financial instruments [line items]  
Financial assets 11,919,897
Probable (base value) | Marketable securities  
Disclosure of detailed information about financial instruments [line items]  
Financial assets 427,329
Probable (base value) | Loans and financing  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities (70,357,356)
Probable (base value) | Interest rate risk [member] | Cash and cash equivalents | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets 3,204,403
Probable (base value) | Interest rate risk [member] | Marketable securities | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial assets 7,917,258
Probable (base value) | Interest rate risk [member] | Loans and financing | CDI/SELIC  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities 8,825,045
Probable (base value) | Interest rate risk [member] | Loans and financing | BNDES – TJLP  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities 101,302
Probable (base value) | Interest rate risk [member] | Loans and financing | SOFR  
Disclosure of detailed information about financial instruments [line items]  
Financial liabilities R$ 25,195,489