Income (expenses) by nature (Details) - BRL (R$) R$ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Disclosure of attribution of expenses by nature to their function [line items]
Personnel expenses			R$ (1,097,120)	R$ (759,931)
Costs of raw materials, materials and services			(6,748,782)	(5,118,397)
Logistics cost			(2,990,033)	(2,201,398)
Depreciation, depletion and amortization			(4,794,691)	(3,558,672)
Other			(706,665)	(154,711)
Total	R$ (8,608,124)	R$ (6,093,239)	(16,337,291)	(11,793,109)
Personnel expenses			(186,015)	(152,841)
Services			(119,340)	(104,965)
Logistics cost			(715,044)	(570,533)
Depreciation and amortization			(484,083)	(478,818)
Other (2)			(88,650)	(46,311)
Selling	(838,250)	(700,053)	(1,593,132)	(1,353,468)
Personnel expenses			(798,162)	(661,716)
Services			(254,575)	(208,933)
Depreciation and amortization			(62,524)	(69,204)
Other (3)			(205,756)	(120,893)
General and administrative	(647,466)	(557,771)	(1,321,017)	(1,060,746)
Results from sales of other products, net			52,044	38,121
Results from sales and disposals of property, plant and equipment, intangible and biological assets, net			(124,099)	(124,424)
Result on fair value adjustment of biological assets			(73,248)	539,003	R$ 1,431,530
Depreciation, amortization and other PPA realizations (4)			4,612	(4,086)
Provision for judicial liabilities			(123,504)	(56,307)
Other operating income (expenses), net			(9,920)	31,663
Total			(274,115)	423,970
Other operating income, net	R$ (154,906)	R$ 464,180	(274,115)	423,971
Cost Of Sales , Idle Capacity And Maintenance			R$ 441,639	R$ 126,392

The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 99
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_99&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 103
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_103&doctype=Standard
-URIDate 2024-03-27