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Basis of preparation of the financial statements and changes to the Group's accounting policies - Summary of direct and indirect interests of Company (Detail) - XP PE Gesto de Recursos Ltda [member] | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 30, 2020
Disclosure of associates [line items] |  |
Country of incorporation |  | Brazil
Principal activities |  | Private equity asset management
% of Group's interest | 99.10% |

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