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Financial instruments and risk management (Tables) | 6 Months Ended
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Jun. 30, 2025
Disclosure of detailed information about financial instruments [line items] |
Financial Instruments - Classification |
| Note |  | 06/30/2025 |  | 12/31/2024
Assets |  |  |  |  |
Amortized cost |  |  |  |  |
Cash and cash equivalents | 5 |  | 12,283,589 |  |  | 9,018,818 |
Trade accounts receivable | 7 |  | 7,287,028 |  |  | 9,132,860 |
Other assets (1) |  |  | 682,051 |  |  | 628,275 |
|  |  | 20,252,668 |  |  | 18,779,953 |
Fair value through other comprehensive income |  |  |  |  |
Investments | 14.1 |  | 931,722 |  |  | 1,138,066 |
|  |  | 931,722 |  |  | 1,138,066 |
Fair value through profit or loss |  |  |  |  |
Derivative financial instruments | 4.5.1 |  | 5,156,340 |  |  | 3,887,100 |
Marketable securities | 6 |  | 8,503,950 |  |  | 13,363,511 |
|  |  | 13,660,290 |  |  | 17,250,611 |
|  |  | 34,844,680 |  |  | 37,168,630 |
Liabilities |  |  |  |  |
Amortized cost |  |  |  |  |
Trade accounts payable | 17 |  | 5,951,839 |  |  | 6,033,285 |
Loans, financing and debentures | 18.1 |  | 91,627,156 |  |  | 101,435,531 |
Lease liabilities | 19.2 |  | 6,787,997 |  |  | 6,972,915 |
Liabilities for assets acquisitions and subsidiaries | 23 |  | 112,535 |  |  | 120,490 |
Dividends and interests on own capital payable |  |  | 1,997 |  |  | 2,200,917 |
Other liabilities (1) |  |  | 155,829 |  |  | 143,330 |
|  |  | 104,637,353 |  |  | 116,906,468 |
Fair value through profit or loss |  |  |  |  |
Derivative financial instruments | 4.5.1 |  | 5,650,833 |  |  | 10,454,820 |
|  |  | 5,650,833 |  |  | 10,454,820 |
|  |  | 110,288,186 |  |  | 127,361,288 |
|  |  | 75,443,506 |  |  | 90,192,658 |
Financial Instruments - Fair Value |
| Yield used to discount/methodology |  | 06/30/2025 |  | 12/31/2024
Quoted in the secondary market |  |  |  |  |
In foreign currency |  |  |  |  |
Bonds | Secondary Market |  | 42,872,554 |  |  | 48,734,909 |
Estimated present value |  |  |  |  |
In foreign currency |  |  |  |  |
Export credits (“Prepayment”) | SOFR |  | 19,618,606 |  |  | 22,740,891 |
Assets Financing | SOFR |  | 331,481 |  |  | 422,115 |
IFC - International Finance Corporation | SOFR |  | 5,581,088 |  |  | 6,261,715 |
ECA - Export Credit Agency | SOFR |  | 769,830 |  |  | 864,202 |
Panda Bonds - CNY | Fixed |  | 907,067 |  |  | 951,125 |
In local currency |  |  |  |  |
BNDES – TJLP | DI 1 |  | 136,792 |  |  | 171,109 |
BNDES – TLP | DI 1 |  | 3,530,603 |  |  | 3,275,012 |
BNDES – TR | DI 1 |  | 36,792 |  |  | 33,466 |
BNDES – Selic (“Special Settlement and Custody System”) | DI 1 |  | 616,896 |  |  | 645,139 |
BNDES – UMBNDES | DI 2 |  | 109,980 |  |  | 106,966 |
Assets Financing | DI 1 |  | 56,446 |  |  | 60,566 |
Debentures | DI 1/IPCA |  | 11,866,426 |  |  | 12,002,992 |
NCE (“Export Credit Notes”) | DI 1 |  | 106,600 |  |  | 108,308 |
NCR (“Rural Credit Notes”) | DI 1 |  | 5,298,162 |  |  | 2,424,457 |
ECO INVEST – Agroindustrial Credit | DI 1 |  | 332,382 |  |  |  |
|  |  | 92,171,705 |  |  | 98,802,972 |
Financial Instrument - Liquidity risk |
|  |  |  |  |  |  |  |  |  |  | 06/30/2025
| Book value |  | Undiscounted cash flow |  | Up to 1 year |  | 1 - 2 years |  | 2 - 5 years |  | More than 5 years
Liabilities |  |  |  |  |  |  |  |  |  |  |
Trade accounts payables | 5,951,839 |  |  | 5,951,839 |  |  | 5,951,839 |  |  |  |  |  |  |
Loans, financing and debentures | 91,627,156 |  |  | 130,146,121 |  |  | 6,628,876 |  |  | 21,331,688 |  |  | 42,346,732 |  |  | 59,838,825 |
Lease liabilities | 6,787,997 |  |  | 12,481,884 |  |  | 1,978,922 |  |  | 1,173,974 |  |  | 3,061,598 |  |  | 6,267,390 |
Liabilities for asset acquisitions and subsidiaries | 112,535 |  |  | 134,678 |  |  | 20,643 |  |  | 19,740 |  |  | 94,295 |  |  |  |
Derivative financial instruments | 5,650,833 |  |  | 8,359,856 |  |  | 447,323 |  |  | 485,387 |  |  | 1,415,834 |  |  | 6,011,312 |
Dividends and interests on own capital payable | 1,997 |  |  | 1,997 |  |  | 1,997 |  |  |  |  |  |  |
Other liabilities | 155,829 |  |  | 155,829 |  |  | 48,184 |  |  | 107,645 |  |  |  |  |
| 110,288,186 |  |  | 157,232,204 |  |  | 15,077,784 |  |  | 23,118,434 |  |  | 46,918,459 |  |  | 72,117,527 |
|  |  |  |  |  |  |  |  |  |  | 12/31/2024
| Book value |  | Undiscounted cash flow |  | Up to 1 year |  | 1 - 2 years |  | 2 - 5 years |  | More than 5 years
Liabilities |  |  |  |  |  |  |  |  |  |  |
Trade accounts payables | 6,033,285 |  |  | 6,033,285 |  |  | 6,033,285 |  |  |  |  |  |  |
Loans, financing and debentures | 101,435,531 |  |  | 142,028,543 |  |  | 13,599,011 |  |  | 14,235,170 |  |  | 50,858,667 |  |  | 63,335,695 |
Lease liabilities | 6,972,915 |  |  | 12,099,294 |  |  | 1,302,590 |  |  | 1,176,832 |  |  | 3,094,493 |  |  | 6,525,379 |
Liabilities for asset acquisitions and subsidiaries | 120,490 |  |  | 146,082 |  |  | 23,425 |  |  | 22,400 |  |  | 100,257 |  |  |
Derivative financial instruments | 10,454,820 |  |  | 13,878,150 |  |  | 1,676,180 |  |  | 957,540 |  |  | 1,489,357 |  |  | 9,755,073 |
Dividends and interests on own capital payable | 2,200,917 |  |  | 2,200,917 |  |  | 2,200,917 |  |  |  |  |  |  |
Other liabilities | 143,330 |  |  | 143,330 |  |  | 60,892 |  |  | 82,438 |  |  |  |  |
| 127,361,288 |  |  | 176,529,601 |  |  | 24,896,300 |  |  | 16,474,380 |  |  | 55,542,774 |  |  | 79,616,147 |
Financial Instruments - Exchange rate risk management |
| 06/30/2025 |  | 12/31/2024
Assets |  |  |
Cash and cash equivalents | 9,057,082 |  |  | 6,496,039 |
Marketable securities | 1,115,185 |  |  | 70,255 |
Trade accounts receivable | 5,585,594 |  |  | 7,090,160 |
Derivative financial instruments | 3,462,240 |  |  | 3,887,100 |
| 19,220,101 |  |  | 17,543,554 |
Liabilities |  |  |
Trade accounts payable | (1,549,258) |  |  | (1,350,763) |
Loans and financing | (69,843,971) |  |  | (83,004,915) |
Liabilities for asset acquisitions and subsidiaries | (84,462) |  |  | (93,308) |
Derivative financial instruments | (3,585,475) |  |  | (10,448,379) |
| (75,063,166) |  |  | (94,897,365) |
| (55,843,065) |  |  | (77,353,811) |
Financial Instruments - sensitivity analysis |
| 06/30/2025
|  |  | Effect on profit or loss
| Probable (base value) |  | Possible (25%) |  | Remote (50%)
Cash and cash equivalents | 9,057,082 |  |  | 2,264,271 |  |  | 4,528,541 |
Marketable securities | 1,115,185 |  |  | 278,796 |  |  | 557,593 |
Trade accounts receivable | 5,585,594 |  |  | 1,396,399 |  |  | 2,792,797 |
Trade accounts payable | (1,549,258) |  |  | (387,315) |  |  | (774,629) |
Loans and financing | (69,843,971) |  |  | (17,460,993) |  |  | (34,921,986) |
Liabilities for asset acquisitions and subsidiaries | (84,462) |  |  | (21,116) |  |  | (42,231) |
| 06/30/2025
|  |  | Effect on profit or loss
| Probable (base value) |  | Possible (25%) |  | Remote (50%)
Embedded derivative in a commitment to purchase standing wood, originating from a forest partnership agreement | 94,560 |  |  | (28,823) |  |  | (59,056) |
Financial Instruments - Sensitivity analysis foreign exchange - derivative |
| 06/30/2025
|  |  | Effect on profit or loss
| Probable (base value) |  | Possible 25% |  | Remote 50%
Dollar/Real |  |  |  |  |
Derivative financial instruments |  |  |  |  |
Derivative options | 290,364 |  |  | (6,463,834) |  |  | (14,873,219) |
Derivative swaps | (873,359) |  |  | (2,591,116) |  |  | (5,096,080) |
Derivative Non-Deliverable Forward (‘NDF’) Contracts | 7,419 |  |  | (115,804) |  |  | (232,931) |
Embedded derivatives | 94,560 |  |  | (171,652) |  |  | (343,304) |
Commodity Derivatives | (13,465) |  |  | (3,485) |  |  | (6,875) |
Dollar/CNY |  |  |  |  |
Derivative financial instruments |  |  |  |  |
NDF parity derivatives | (14) |  |  | (3) |  |  | (6) |
|  | Notional value, net in U.S.$ |  | Fair value in R$
|  | 06/30/2025 |  | 12/31/2024 |  | 06/30/2025 |  | 12/31/2024
Instruments as part of cash flow protection strategy |  |  |  |  |  |  |  |
Cash flow hedge |  |  |  |  |  |  |  |
Zero Cost Collar |  | 6,844,400 |  |  | 6,852,200 |  |  | 290,364 |  |  | (4,328,970) |
NDF (R$ x US$) |  | 90,000 |  |  | 581,000 |  |  | 7,419 |  |  | (331,876) |
NDF (CNY x US$) |  | 1,500 |  |  |  |  | (14) |  |  |
Debt hedges |  |  |  |  |  |  |  |
Swap SOFR x Fixed (US$) |  | 1,576,482 |  |  | 1,973,705 |  |  | 112,139 |  |  | 394,129 |
Swap IPCA x CDI (notional in Brazilian Reais) |  | 8,011,292 |  |  | 8,128,395 |  |  | (517,031) |  |  | (825,899) |
Swap CNY x Fixed (US$) |  | 165,815 |  |  | 165,815 |  |  | (311) |  |  | (6,440) |
Swap CDI x Fixed (US$) |  | 1,084,612 |  |  | 909,612 |  |  | (351,438) |  |  | (776,261) |
Pre-fixed Swap to CDI (notional in Brazilian Reais) |  | 2,702,972 |  |  |  |  | 47,421 |  |  |
Swap CDI x SOFR (US$) |  | 635,171 |  |  | 610,171 |  |  | (164,140) |  |  | (590,764) |
Swap SOFR x SOFR (US$) |  |  |  |  | 150,961 |  |  |  |  |  | (37,850) |
Commodity Hedge |  |  |  |  |  |  |  |
Swap US$ e US-CPI (1) |  | 138,182 |  |  | 138,439 |  |  | 94,560 |  |  | (80,759) |
Zero Cost Collar (Brent) |  | 306,998 |  |  | 163,941 |  |  | (13,579) |  |  | 6,097 |
Swap VLSFO/Brent |  | 13,518 |  |  | 39,706 |  |  | 117 |  |  | 10,873 |
|  |  |  |  |  | (494,493) |  |  | (6,567,720) |
Current assets |  |  |  |  |  | 1,100,397 |  |  | 1,006,427 |
Non-current assets |  |  |  |  |  | 4,055,943 |  |  | 2,880,673 |
Current liabilities |  |  |  |  |  | (1,044,493) |  |  | (2,760,273) |
Non-current liabilities |  |  |  |  |  | (4,606,340) |  |  | (7,694,547) |
|  |  |  |  |  | (494,493) |  |  | (6,567,720) |
Financial Instruments - Fair Value Maturity |
| 06/30/2025 |  | 12/31/2024
2025 | 108,204 |  |  | (1,753,846) |
2026 | 355,770 |  |  | (1,699,768) |
2027 | 720,745 |  |  | (36,905) |
2028 onwards | (1,679,212) |  |  | (3,077,201) |
| (494,493) |  |  | (6,567,720) |
Financial Instruments - Outstanding assets and liabilities |
|  |  |  | Notional value |  | Fair value in R$
|  | Currency |  | 06/30/2025 |  | 12/31/2024 |  | 06/30/2025 |  | 12/31/2024
Debt hedges |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |
Swap CDI to Fixed |  | US$ |  | 5,672,695 |  |  | 4,748,394 |  |  | 1,343,712 |  |  | 1,482,759 |
Swap SOFR to Fixed |  | US$ |  | 1,576,482 |  |  | 1,973,705 |  |  | 263,803 |  |  | 424,824 |
Swap IPCA to CDI |  | R$ |  | 8,508,353 |  |  | 8,382,699 |  |  | 877,583 |  |  | 927,586 |
Pre-fixed Swap to CDI |  | US$ |  | 2,700,000 |  |  |  |  |  | 355,628 |  |  |  |
Swap CDI to SOFR |  | US$ |  | 3,260,425 |  |  | 3,117,625 |  |  | 872,515 |  |  | 754,173 |
Swap CNY to Fixed |  | CNY |  | 1,200,000 |  |  | 1,200,000 |  |  | 31,144 |  |  |  |
Swap SOFR to SOFR |  | US$ |  |  |  |  | 150,961 |  |  |  |  |  | 4,949 |
|  |  |  |  |  |  |  | 3,744,385 |  |  | 3,594,291 |
Liabilities |  |  |  |  |  |  |  |  |  |
Swap CDI to Fixed |  | US$ |  | 1,084,612 |  |  | 909,612 |  |  | (1,695,150) |  |  | (2,259,020) |
Swap SOFR to Fixed |  | US$ |  | 1,576,482 |  |  | 1,973,705 |  |  | (151,664) |  |  | (30,695) |
Swap IPCA to CDI |  | R$ |  | 8,011,292 |  |  | 8,128,395 |  |  | (1,394,614) |  |  | (1,753,485) |
Pre-fixed Swap to CDI |  | US$ |  | 2,700,000 |  |  |  |  |  | (308,207) |  |  |  |
Swap CDI to SOFR |  | US$ |  | 635,171 |  |  | 610,171 |  |  | (1,036,655) |  |  | (1,344,937) |
Swap CNY to Fixed |  | US$ |  | 165,815 |  |  | 165,815 |  |  | (31,455) |  |  | (6,440) |
Swap SOFR to SOFR |  | US$ |  |  |  |  | 150,961 |  |  |  |  |  | (42,799) |
|  |  |  |  |  |  |  | (4,617,745) |  |  | (5,437,376) |
|  |  |  |  |  |  |  | (873,360) |  |  | (1,843,085) |
Cash flow hedge |  |  |  |  |  |  |  |  |  |
Zero Cost Collar (US$ x R$) |  | US$ |  | 6,844,400 |  |  | 6,852,200 |  |  | 290,364 |  |  | (4,328,970) |
NDF (R$ x US$) |  | US$ |  | 90,000 |  |  | 581,000 |  |  | 7,419 |  |  | (331,876) |
NDF (CNY x US$) |  | US$ |  | 1,500 |  |  |  |  |  | (14) |  |  |  |
|  |  |  |  |  |  |  | 297,769 |  |  | (4,660,846) |
Commodity hedge |  |  |  |  |  |  |  |  |  |
Swap US-CPI (standing wood) (1) |  | US$ |  | 138,182 |  |  | 138,439 |  |  | 94,560 |  |  | (80,759) |
Zero Cost Collar (Brent) |  | US$ |  | 306,998 |  |  | 163,941 |  |  | (13,579) |  |  | 6,097 |
Swap VLSFO/Brent |  | US$ |  | 13,518 |  |  | 39,706 |  |  | 117 |  |  | 10,873 |
|  |  |  |  |  |  |  | 81,098 |  |  | (63,789) |
|  |  |  |  |  |  |  | (494,493) |  |  | (6,567,720) |
Financial Instruments - Fair Value Settled |
| 06/30/2025 |  | 12/31/2024
Cash flow hedge |  |  |
Zero Cost Collar (R$ x US$) | (102) |  |  | 645,759 |
NDF (R$ x US$) | (19,000) |  |  | (68,695) |
NDF (€ x US$) |  |  | 73,781 |
| (19,102) |  |  | 650,845 |
Commodity Hedge | 5,495 |  |  | 89,327 |
Swap VLSFO/other | 5,495 |  |  | 89,327 |
Debt hedges |  |  |
Swap CDI to Fixed (US$) | 198,033 |  |  | (1,635,058) |
Swap IPCA to CDI (Brazilian Reais) | (125,029) |  |  | (59,243) |
Swap Pre-Fixed to US$ |  |  |  | (221,462) |
Swap SOFR to SOFR (US$) | 1,504 |  |  | 2,199 |
Swap CDI to SOFR (US$) | 79,748 |  |  | 19,074 |
Swap SOFR to Fixed (US$) | 138,632 |  |  | 603,737 |
| 292,888 |  |  | (1,290,753) |
| 279,281 |  |  | (550,581) |
Financial Instruments - Fair Value Hierarchy |
|  |  |  |  |  | 06/30/2025
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |  |
At fair value through profit or loss |  |  |  |  |  |  |  |
Derivative financial instruments |  |  |  | 5,156,340 |  |  |  |  | 5,156,340 |
Marketable securities |  | 1,260,384 |  |  | 7,243,566 |  |  |  |  | 8,503,950 |
|  | 1,260,384 |  |  | 12,399,906 |  |  |  |  |  | 13,660,290 |
At fair value through other comprehensive income |  |  |  |  |  |  |  |
Other investments (note 14.1) |  | 896,680 |  |  |  |  | 35,042 |  |  | 931,722 |
|  | 896,680 |  |  |  |  |  | 35,042 |  |  | 931,722 |
Biological assets |  |  |  |  |  | 23,221,979 |  |  | 23,221,979 |
|  |  |  |  |  |  |  | 23,221,979 |  |  | 23,221,979 |
Total assets |  | 2,157,064 |  |  | 12,399,906 |  |  | 23,257,021 |  |  | 37,813,991 |
Liabilities |  |  |  |  |  |  |  |
At fair value through profit or loss |  |  |  |  |  |  |  |
Derivative financial instruments |  |  |  | 5,650,833 |  |  |  |  | 5,650,833 |
|  |  |  |  | 5,650,833 |  |  |  |  |  | 5,650,833 |
|  |  |  |  | 5,650,833 |  |  |  |  |  | 5,650,833 |
|  |  |  |  |  |  | 12/31/2024
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |
At fair value through profit or loss |  |  |  |  |  |  |
Derivative financial instruments |  |  | 3,887,100 |  |  |  |  | 3,887,100 |
Marketable securities | 1,203,776 |  |  | 12,159,735 |  |  |  |  | 13,363,511 |
| 1,203,776 |  |  | 16,046,835 |  |  |  |  |  | 17,250,611 |
At fair value through other comprehensive income |  |  |  |  |  |  |
Other investments - (note 14.1) |  |  |  |  | 38,196 |  |  | 1,138,066 |
| 1,099,870 |  |  |  |  |  | 38,196 |  |  | 1,138,066 |
Biological assets |  |  |  |  | 22,283,001 |  |  | 22,283,001 |
|  |  |  |  |  |  | 22,283,001 |  |  | 22,283,001 |
Total assets | 2,303,646 |  |  | 16,046,835 |  |  | 22,321,197 |  |  | 40,671,678 |
Liabilities |  |  |  |  |  |  |
At fair value through profit or loss |  |  |  |  |  |  |
Derivative financial instruments |  |  | 10,454,820 |  |  |  |  | 10,454,820 |
|  |  |  | 10,454,820 |  |  |  |  |  | 10,454,820 |
Total liabilities |  |  |  | 10,454,820 |  |  |  |  |  | 10,454,820 |
Interest rate risk [member] | Financial instruments, excluding derivatives |
Disclosure of detailed information about financial instruments [line items] |
Financial Instruments - sensitivity analysis |
| 06/30/2025
|  |  | Effect on profit or loss
| Probable |  | Possible (25%) |  | Remote (50%)
CDI/SELIC |  |  |  |  |
Cash and cash equivalents | 2,836,399 |  |  | 105,656 |  |  | 211,312 |
Marketable securities | 5,803,142 |  |  | 217,055 |  |  | 434,111 |
Loans and financing | 9,371,502 |  |  | 349,088 |  |  | 698,177 |
TJLP/TLP |  |  |  |  |
Loans and financing | 149,642 |  |  | 3,236 |  |  | 6,472 |
SOFR |  |  |  |  |
Loans and financing | 24,616,123 |  |  | 273,854 |  |  | 547,709 |
Interest rate risk [member] | Derivative financial instruments |
Disclosure of detailed information about financial instruments [line items] |
Financial Instruments - sensitivity analysis |
| 06/30/2025
|  |  | Effect on profit or loss
| Probable |  | Probable 25% |  | Remote 50%
CDI |  |  |  |  |
Derivative financial instruments |  |  |  |  |
Liabilities |  |  |  |  |
Derivative options | 290,364 |  |  | (575,729) |  |  | (1,103,722) |
Derivative swaps | (873,359) |  |  | (412,617) |  |  | (770,990) |
SOFR |  |  |  |  |
Derivative financial instruments |  |  |  |  |
Liabilities |  |  |  |  |
Derivative swaps | (873,359) |  |  | (135,482) |  |  | (263,370) |

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- Definition The disclosure of derivative financial instruments. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_10_e&doctype=Standard -URIDate 2024-03-27 + Details
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