Loan operations - Loan operations by concentration (Details) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	R$ 365,169,005	R$ 321,697,974
Percentage of loan products collateralized by customers’ investments on XP platform	76.00%	78.00%
Loans operations
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	R$ 34,618,028	R$ 29,648,544
Loans operations \| Largest Debtor [Member] \| Credit risk
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	4,175,501	2,407,808
Loans operations \| 10 Largest Debtors [Member] \| Credit risk
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	6,950,812	4,799,033
Loans operations \| 20 Largest Debtors [Member] \| Credit risk
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	8,133,975	5,831,608
Loans operations \| 50 Largest Debtors [Member] \| Credit risk
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	9,770,062	7,475,742
Loans operations \| 100 Largest Debtors [Member] \| Credit risk
Disclosure of financial assets [line items]
Securities - Brazilian sovereign bonds (Note 7A)	R$ 10,838,691	R$ 8,601,442

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2025-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_35M&doctype=Standard
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
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