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Shareholders' equity - Business Combination (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 04, 2023 BRL (R$) shares tranche | Dec. 31, 2024 BRL (R$) | Dec. 31, 2023 BRL (R$) | Mar. 04, 2023 USD ($) shares tranche | Mar. 03, 2023 BRL (R$) | Mar. 03, 2023 USD ($) | Feb. 28, 2023 BRL (R$) | Feb. 28, 2023 $ / shares | Dec. 31, 2021
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |
Goodwill recognised as of acquisition date |  |  | R$ 213,123,000 |  |  |  |  |  |
Percentage of Reserve Allocation of Net Income |  | 5.00% |  |  |  |  |  |  |
Percentage of Reserve Not Exceeds Overall Equity |  | 20.00% |  |  |  |  |  |  |
HPX Corporation [Member] |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired | 2.75% |  |  | 2.75% | 70.80% | 70.80% |  |  | 100.00%
Capital Contribution |  |  |  |  | R$ 906,800,000 | $ 174.2 |  |  |
Cash transferred |  |  |  |  | 48,100,000 | 9.2 |  |  |
Financial assets recognised as of acquisition date |  |  |  |  | 595,900,000 | 114.5 |  |  |
Financial liabilities recognised as of acquisition date |  |  |  |  | R$ 262,800,000 | $ 50.5 |  |  |
Stock listing expenses | R$ 100,900,000 | R$ 100,909,000 |  | $ 19.4 |  |  |  |  |
Extraordinary Expenses | R$ 18,913,000 |  |  |  |  |  |  |  |
Number of instruments or interests issued or issuable | shares | 11,000,000 |  |  | 11,000,000 |  |  |  |  |
Number of shares each tranches | shares | 5,500,000 |  |  | 5,500,000 |  |  |  |  |
Number of Tranche | tranche | 2 |  |  | 2 |  |  |  |  |
Description of Tranches conditions | The first tranche will be granted if the AMBI quotation exceeds US$17.0 per share during any 20 trading sessions out of 30 consecutive trading sessions. The second tranche will be granted if the AMBI quotation exceeds US$20.0 per share during any 20 trading sessions out of 30 consecutive trading sessions. If these objectives are not achieved by March 3, 2026, the Earn-out not awarded will be cancelled. |  |  |  |  |  |  |  |
Market price per share | $ / shares |  |  |  |  |  |  |  | $ 9.89 |
Transaction and Exchange cost |  |  |  |  |  |  | R$ 5.2037 |  |
Goodwill recognised as of acquisition date | R$ 326,056,000 |  |  |  |  |  |  |  |

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