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Financial instruments - Sensitivity analysis – exposure to interest rates – except for derivative financial instruments (Details) R$ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2025 BRL (R$)	Sep. 30, 2025 BRL (R$)
Possible 25% | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	R$ 3,651,752	R$ 3,651,752
Possible 25% | Marketable securities
Disclosure of detailed information about financial instruments [line items]
Financial assets	201,816	201,816
Possible 25% | Loans and financing
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	R$ (17,260,522)	R$ (17,260,522)
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%	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$ 41,783	R$ 41,783
Possible 25% | Interest rate risk [member] | Marketable securities | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial assets	200,214	200,214
Possible 25% | Interest rate risk [member] | Loans and financing | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	334,607	334,607
Possible 25% | Interest rate risk [member] | Loans and financing | BNDES – TJLP
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	2,750	2,750
Possible 25% | Interest rate risk [member] | Loans and financing | SOFR
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	268,906	268,906
Remote 50% | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	7,303,505	7,303,505
Remote 50% | Marketable securities
Disclosure of detailed information about financial instruments [line items]
Financial assets	403,632	403,632
Remote 50% | Loans and financing
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	R$ (34,521,043)	R$ (34,521,043)
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%	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$ 83,566	R$ 83,566
Remote 50% | Interest rate risk [member] | Marketable securities | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial assets	400,428	400,428
Remote 50% | Interest rate risk [member] | Loans and financing | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	669,214	669,214
Remote 50% | Interest rate risk [member] | Loans and financing | BNDES – TJLP
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	5,500	5,500
Remote 50% | Interest rate risk [member] | Loans and financing | SOFR
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	537,811	537,811
Probable (base value) | Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Financial assets	14,607,009	14,607,009
Probable (base value) | Marketable securities
Disclosure of detailed information about financial instruments [line items]
Financial assets	807,263	807,263
Probable (base value) | Loans and financing
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	(69,042,086)	(69,042,086)
Probable (base value) | Interest rate risk [member] | Cash and cash equivalents | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial assets	1,121,685	1,121,685
Probable (base value) | Interest rate risk [member] | Marketable securities | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial assets	5,374,880	5,374,880
Probable (base value) | Interest rate risk [member] | Loans and financing | CDI/SELIC
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	8,982,744	8,982,744
Probable (base value) | Interest rate risk [member] | Loans and financing | BNDES – TJLP
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	122,763	122,763
Probable (base value) | Interest rate risk [member] | Loans and financing | SOFR
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	R$ 25,368,450	R$ 25,368,450

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- Definition

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- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

+ References

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- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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