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Equity - Non-Controlling Interest (Details) - BRL (R$) R$ in Thousands |  |  | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Jun. 24, 2021 | May 06, 2021 | Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share capital |  |  |  |  |  |  |
Total value of shares offering and issued |  |  |  |  |  | R$ 1,181,351 | R$ 1,250,235
Value recognized in equity |  |  | R$ 33,998 | R$ 5,488,170 |  |  |
Banco Inter S.A. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Value recognized in equity |  | R$ 1,566,887 |  |  |  |  |
Overall equity interest (as a percent) |  |  |  |  | 31.40% | 0.00% |
Non-controlling interests. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Total value of shares offering and issued |  |  |  |  |  |  | 268
Value recognized in equity |  |  | R$ 33,998 | 3,921,283 |  |  |
Non-controlling interests. | Banco Inter S.A. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Total value of shares offering and issued |  | 5,488,170 |  |  |  |  |
Value recognized in equity |  | 3,921,283 |  |  |  |  |
Equity attributable to owners of parent [member] |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Total value of shares offering and issued |  |  |  |  |  | R$ 1,181,351 | R$ 1,249,967
Value recognized in equity |  |  |  | R$ 1,566,887 |  |  |
Equity attributable to owners of parent [member] | Banco Inter S.A. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Value recognized in equity |  | R$ 5,488,170 |  |  |  |  |
Banco Inter S.A. | Equity attributable to owners of parent [member] |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Overall equity interest (as a percent) | 31.44% |  |  |  |  |  |
Voting rights interest (as a percent) | 53.30% |  |  | 53.30% | 53.30% |  |
Common | Non-controlling interests. | Banco Inter S.A. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Issuance of shares |  | 143,017,604 |  |  |  |  |
Preferred | Non-controlling interests. | Banco Inter S.A. |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  |
Issuance of shares |  | 142,252,104 |  |  |  |  |

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