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Risk management (Details 7) - BRL (R$) R$ in Thousands	Mar. 31, 2024	Dec. 31, 2023
IfrsStatementLineItems [Line Items]
Exposure interest rate risk	R$ (2,671,887)	R$ (2,785,853)
Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities	(893,401)
Probable Scenario [Member] | Interest rate risk [member] | Interest To Be Incurred [Member]
IfrsStatementLineItems [Line Items]
Liabilities	(1,248,216)
Probable Scenario [Member] | Interest rate risk [member] | Financial Income [Member]
IfrsStatementLineItems [Line Items]
Assets	606,979
C D I [Member] | Exposure [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Assets	6,162,220
Liabilities	(12,672,245)
Exposure interest rate risk	R$ (6,510,025)
C D I [Member] | Probable Scenario [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Assets Interest Rate	9.85%
Liabilities Interest Rate	9.85%
Exposure interest rate risk	R$ (641,237)
T R [Member] | Exposure [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (1,656,774)
T R [Member] | Probable Scenario [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities Interest Rate	0.0048%
T R [Member] | Probable Scenario [Member] | Interest rate risk [member] | Expenses To Be Incurred [Member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (80)
I P C A [Member] | Exposure [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (2,927,406)
I P C A [Member] | Probable Scenario [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities Interest Rate	3.46%
I P C A [Member] | Probable Scenario [Member] | Interest rate risk [member] | Expenses To Be Incurred [Member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (101,288)
T J L P [Member] | Exposure [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (1,290,064)
T J L P [Member] | Probable Scenario [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities Interest Rate	6.38%
T J L P [Member] | Probable Scenario [Member] | Interest rate risk [member] | Interest To Be Incurred [Member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (82,306)
L I B O R [Member] | Exposure [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (1,359,011)
L I B O R [Member] | Probable Scenario [Member] | Interest rate risk [member]
IfrsStatementLineItems [Line Items]
Liabilities Interest Rate	5.0397%
L I B O R [Member] | Probable Scenario [Member] | Interest rate risk [member] | Interest To Be Incurred [Member]
IfrsStatementLineItems [Line Items]
Liabilities	R$ (68,490)

X

- 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: Financial instruments, class [member]; Financial liabilities]

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X

- 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: Financial instruments, class [member]; Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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