Inventories (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Inventories [Line Items]
Current finished goods
Current work in progress	113,212	135,380
Spare parts and other	1,491,820	1,302,534
Estimated losses	(208,091)	(97,934)
Inventories	8,155,847	7,962,324
Pulp \| Country of domicile
Inventories [Line Items]
Current finished goods	644,881	801,623
Pulp \| Foreign countries
Inventories [Line Items]
Current finished goods	1,713,394	1,510,985
Paper \| Country of domicile
Inventories [Line Items]
Current finished goods	587,216	561,409
Paper \| Foreign countries
Inventories [Line Items]
Current finished goods	507,999	362,027
Wood
Inventories [Line Items]
Current work in progress	2,267,720	2,287,406
Operating supplies and packaging
Inventories [Line Items]
Current work in progress	R$ 1,037,696	R$ 1,098,894

A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [Refer: Inventories]

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The amount of current inventories. [Refer: Inventories]

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A classification of current inventory representing the amount of interchangeable parts that are kept in an inventory and are used for the repair or replacement of failed parts. [Refer: Inventories]

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A classification of current inventory representing the amount of assets currently in production, which require further processes to be converted into finished goods or services. [Refer: Current finished goods; Inventories]

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The amount of an allowance account used to record impairments to financial assets due to credit losses.

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Inventories [Line Items]

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