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Capital management and fair values of financial instruments - Additional information (Details) - BRL (R$) R$ in Thousands |  | 12 Months Ended
--- | --- | ---
May 08, 2019 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |
Resources from non-controlling interest, including capital increase |  |  |  |  | R$ 5,478,926 | R$ 31,629 | R$ 45,000
Other assets [Member] | Level 3 | Inter Seguros |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |
Ownership interest sold | 40.00% |  |  |  |  |  |
Resources from non-controlling interest, including capital increase |  | R$ 45,000 | R$ 45,000 | R$ 45,000 | R$ 45,000 |  |

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