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Significant accounting policies- Business combinations (Details) client in Thousands, R$ in Thousands |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 01, 2021 BRL (R$) | Feb. 12, 2021 BRL (R$) installment | Jan. 03, 2020 BRL (R$) client installment | Dec. 31, 2021 BRL (R$) | Dec. 31, 2020 BRL (R$) | May 13, 2021 BRL (R$) | Dec. 20, 2020 BRL (R$)
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration paid |  |  |  | R$ 93,782 | R$ 24,905 |  |
Meu Acerto |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred |  | R$ 45,000 |  |  |  |  |
Revenue |  |  |  | 9,343 |  |  |
Profit (loss) |  |  |  | (3,750) |  |  |
Percentage of voting interest |  | 60.00% |  |  |  |  |
Consideration to minority shareholders |  | R$ 25,000 |  |  |  |  |
Consideration as contributed capital |  | 20,000 |  |  |  |  |
Goodwill |  | 25,298 |  |  |  |  |
Consideration paid |  | 7,250 |  |  |  |  |
Consideration payable, noncurrent |  |  |  | 17,750 |  |  |
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [abstract] |  |  |  |  |  |  |
Financial instruments |  | 20,212 |  |  |  |  |
Other financial assets |  | 2,257 |  |  |  |  |
Property and equipment |  | 499 |  |  |  |  |
Intangible |  | 13,208 |  |  |  |  |
Loan and onlending liabilities |  | (1,455) |  |  |  |  |
Other liabilities |  | (1,977) |  |  |  |  |
Total identifiable net assets acquired |  | 32,755 |  |  |  |  |
Net assets |  | (32,755) |  |  |  |  |
Interest of non-controlling shareholders, based on the pro-rata interest on the assets acquired and liabilities assumed |  | 13,053 |  |  |  |  |
Costs related to acquisition |  | R$ 25 |  |  |  |  |
Expected revenues |  |  |  | 20,545 |  |  |
Expected loss |  |  |  | 3,855 |  |  |
Number of installments for payment of consideration | installment |  | 2 |  |  |  |  |
Inter Asset Holding S.A. |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred |  |  | R$ 49,000 |  |  |  |
Revenue |  |  |  |  | 278 |  |
Profit (loss) |  |  |  |  | R$ 139 |  |
Goodwill |  |  | 37,427 |  |  |  |
Consideration paid |  |  | 49,000 |  |  |  |
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [abstract] |  |  |  |  |  |  |
Property and equipment |  |  | 508 |  |  |  |
Cash and cash equivalents |  |  | 2,021 |  |  |  |
Trade receivables |  |  | 1,628 |  |  |  |
Other assets |  |  | 1,040 |  |  |  |
Liabilities |  |  | (2,008) |  |  |  |
Customer relationships |  |  | 13,344 |  |  |  |
Total identifiable net assets acquired |  |  | 16,533 |  |  |  |
Net assets |  |  | (16,533) |  |  |  |
Interest of non-controlling shareholders, based on the pro-rata interest on the assets acquired and liabilities assumed |  |  | R$ 4,960 |  |  |  |
Percentage ownership of entity shares |  |  | 70.00% |  |  |  |
Share in the capital |  |  | 98.00% |  |  |  |
Number of clients | client |  |  | 425 |  |  |  |
Number of installments for payment of consideration | installment |  |  | 4 |  |  |  |
The fixed portion of total consideration |  |  | R$ 24,500 |  |  |  |
The variable portion of total consideration |  |  | R$ 24,500 |  |  |  |
Inter Caf Ltda. |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  | R$ 10
Revenue |  |  |  | 2,080 |  |  |
Profit (loss) |  |  |  | (702) |  |  |
Inter Boutiques Ltda. |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  | R$ 10
Revenue |  |  |  | 2,202 |  |  |
Profit (loss) |  |  |  | 599 |  |  |
Inter Food Ltda. |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  | R$ 8,350 |
Revenue |  |  |  | 1,322 |  |  |
Profit (loss) |  |  |  | 163 |  |  |
Percentage of voting interest |  |  |  |  |  | 70.00% |
Consideration to minority shareholders |  |  |  |  |  | R$ 7,350 |
Consideration as contributed capital |  |  |  |  |  | R$ 1,000 |
Goodwill |  |  |  | 6,950 |  |  |
IM Designs Desenvolvimento de Software Ltda. |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Consideration transferred | R$ 15,000 |  |  |  |  |  |
Revenue |  |  |  | 2,200 |  |  |
Profit (loss) |  |  |  | (63) |  |  |
Goodwill |  |  |  | 11,743 |  |  |
Consideration paid | R$ 10,000 |  |  |  |  |  |
Consideration payable, current |  |  |  | R$ 5,000 |  |  |

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