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Shareholders' equity (Details) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [abstract] |  |
Identifiable assets acquired (liabilities assumed) |  | R$ (373,153)
Consideration transferred, acquisition-date fair value |  | 733,604
Determining goodwill from expected future profitability |  |
Consideration transferred, acquisition-date fair value |  | 733,604
Goodwill recognised as of acquisition date |  | R$ 213,123
Inversiones Disal Emergencias S.A. |  |
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [abstract] |  |
Cash and cash equivalents recognised as of acquisition date | R$ (1,005) |
Other assets | 25,650 |
Other liabilities | (323) |
Identifiable assets acquired (liabilities assumed) | (26,332) |
Consideration transferred, acquisition-date fair value | 144,430 |
Cash flow on acquisitions of companies with shareholders | 143,425 |
Determining goodwill from expected future profitability |  |
Consideration transferred, acquisition-date fair value | 144,430 |
Goodwill recognised as of acquisition date | R$ 118,098 |
Percentage of voting equity interests acquired | 100.00% |

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