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Financial instruments - Outstanding derivatives by contract type, including embedded derivatives (Details) R$ in Thousands, $ in Thousands | Dec. 31, 2024 BRL (R$) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 BRL (R$) | Dec. 31, 2023 USD ($)
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Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | R$ (6,567,720) |  | R$ 1,994,382 |
Derivative financial instruments | 1,006,427 |  | 2,676,526 |
Derivative financial instruments | 2,880,673 |  | 1,753,928 |
Current derivative financial liabilities | (2,760,273) |  | (578,763) |
Non-current derivative financial liabilities | (7,694,547) |  | (1,857,309) |
Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | (4,660,846) |  | 2,231,475 |
Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | (1,843,085) |  | (486,713) |
Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | (63,789) |  | 249,620 |
NDF (R$ x US$) | Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 581,000 |  | 505,000 |
Fair value in R$ | (331,876) |  | 162,776 |
NDF (€ x US$) | Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value |  |  | 262,088 |
Fair value in R$ |  |  | 100,362 |
Swap US$ e US-CPI (1) | Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 138,439 |  | 131,510 |
Fair value in R$ | (80,759) |  | 230,471 |
Swap VLSFO/Brent | Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 39,706 |  | 142,794 |
Fair value in R$ | 10,873 |  | 22,297 |
Interest rate swap contract [member] | Zero Cost Collar | Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | $ 6,852,200 |  | $ 4,500,200
Fair value in R$ | (4,328,970) |  | 1,968,337 |
Interest rate swap contract [member] | Zero Cost Collar | Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 163,941 |  | 163,100
Fair value in R$ | 6,097 |  | (3,148) |
Interest rate swap contract [member] | NDF (R$ x US$) | Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 581,000 |  | 505,000
Fair value in R$ | (331,876) |  | 162,776 |
Interest rate swap contract [member] | NDF (€ x US$) | Operational Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  |  |  | 262,088
Fair value in R$ |  |  | 100,362 |
Interest rate swap contract [member] | Swap SOFR to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 1,973,705 |  | 2,555,626
Fair value in R$ | 394,129 |  | 741,492 |
Interest rate swap contract [member] | Swap IPCA to CDI (notional in Brazilian Reais) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 8,128,395 |  | 4,274,397
Fair value in R$ | (825,899) |  | 47,645 |
Interest rate swap contract [member] | Swap CNH to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 165,815 |  |
Fair value in R$ | (6,440) |  |  |
Interest rate swap contract [member] | Swap CDI x Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 909,612 |  | 1,025,000
Fair value in R$ | (776,261) |  | (1,081,964) |
Interest rate swap contract [member] | Pre-fixed Swap R$ to US$ (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  |  |  | 200,000
Fair value in R$ |  |  | (203,045) |
Interest rate swap contract [member] | Swap CDI x SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 610,171 |  | 125,000
Fair value in R$ | (590,764) |  |  | 25,774
Interest rate swap contract [member] | Swap SOFR to SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 150,961 |  | 150,961
Fair value in R$ | (37,850) |  |  | (16,615)
Interest rate swap contract [member] | Swap US$ e US-CPI (1) | Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | 138,439 |  | 131,510
Fair value in R$ | (80,759) |  | 230,471 |
Interest rate swap contract [member] | Swap VLSFO/Brent | Commodity Hedge |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | $ |  | $ 39,706 |  | $ 142,794
Fair value in R$ | 10,873 |  | 22,297 |
Derivative Assets | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | 3,594,291 |  | 1,529,543 |
Derivative Assets | Swap SOFR to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 1,973,705 |  | 2,555,626 |
Fair value in R$ | 424,824 |  | 1,104,984 |
Derivative Assets | Swap IPCA to CDI (notional in Brazilian Reais) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 8,382,699 |  | 4,320,471 |
Fair value in R$ | 927,586 |  | 161,542 |
Derivative Assets | Swap CNH to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 1,200,000 |  |  |
Derivative Assets | Swap CDI x Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 4,748,394 |  | 3,898,011 |
Fair value in R$ | 1,482,759 |  | 223,776 |
Derivative Assets | Swap CDI x SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 3,117,625 |  | 644,850 |
Fair value in R$ | 754,173 |  | 32,560 |
Derivative Assets | Swap SOFR to SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 150,961 |  | 150,961 |
Fair value in R$ | 4,949 |  | 6,681 |
Derivative Liabilities | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Fair value in R$ | (5,437,376) |  | (2,016,256) |
Derivative Liabilities | Swap SOFR to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 1,973,705 |  | 2,555,626 |
Fair value in R$ | (30,695) |  | (363,492) |
Derivative Liabilities | Swap IPCA to CDI (notional in Brazilian Reais) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 8,128,395 |  | 4,274,397 |
Fair value in R$ | (1,753,485) |  | (113,897) |
Derivative Liabilities | Swap CNH to Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 165,815 |  |  |
Fair value in R$ | (6,440) |  |  |
Derivative Liabilities | Swap CDI x Fixed (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 909,612 |  | 1,025,000 |
Fair value in R$ | (2,259,020) |  | (1,305,740) |
Derivative Liabilities | Swap CDI x SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 610,171 |  | 125,000 |
Fair value in R$ | (1,344,937) |  | (6,786) |
Derivative Liabilities | Swap SOFR to SOFR (US$) | Debt hedges |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Notional value | 150,961 |  | 150,961 |
Fair value in R$ | R$ (42,799) |  | R$ (23,296) |

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