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Capital management and fair values of financial instruments (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	R$ 33,406,040	R$ 19,515,659
Financial assets, fair value	12,079,088	5,633,882
Financial liabilities, accounting value	27,956,065	16,482,564
Financial liabilities, fair value	66,545	56,758
Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, fair value	12,001,701	5,524,666
Financial liabilities, fair value	66,545	56,758
Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, fair value	77,387	109,216
Fair value through profit or loss
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	66,545	56,758
Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	27,889,520	16,425,806
Liabilities with financial institutions
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	5,341,464	1,756,913
Liabilities with financial institutions | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	5,341,464	1,756,913
Liabilities with customer
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	18,333,543	12,436,632
Liabilities with customer | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	18,333,543	12,436,632
Securities issued [Member]..
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	3,572,093	1,729,436
Securities issued [Member].. | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	3,572,093	1,729,436
Derivative financial instrument
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	66,545	56,758
Financial liabilities, fair value	66,545	56,758
Derivative financial instrument | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, fair value	66,545	56,758
Derivative financial instrument | Fair value through profit or loss
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	66,545	56,758
Borrowing and onlending [Member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	25,071	27,405
Borrowing and onlending [Member] | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	25,071	27,405
Other liabilities [Member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	617,349	475,420
Other liabilities [Member] | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, accounting value	617,349	475,420
Fair value through profit or loss - FVTPL
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	865,365	232,752
Fair value through other comprehensive income - FVOCI
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	11,137,938	5,291,154
Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	21,402,736	13,991,753
Cash and cash equivalents [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	500,446	2,154,687
Cash and cash equivalents [Member] | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	500,446	2,154,687
Amounts due from financial institution
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	2,051,862	502,369
Amounts due from financial institution | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	2,051,862	502,369
Compulsory deposits at Banco Central do Brasil..
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value		1,709,729
Compulsory deposits at Banco Central do Brasil.. | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value		1,709,729
Loans and advances to customers
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	17,216,362	8,790,058
Loans and advances to customers | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	17,216,362	8,790,058
Underlying security
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	12,757,687	5,812,622
Financial assets, fair value	11,914,753	5,497,153
Underlying security | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, fair value	11,914,753	5,497,153
Underlying security | Fair value through profit or loss - FVTPL
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	778,417	205,238
Underlying security | Fair value through other comprehensive income - FVOCI
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	11,137,938	5,291,154
Underlying security | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	841,333	315,470
Derivative financial instrument
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	86,948	27,513
Financial assets, fair value	86,948	27,513
Derivative financial instrument | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, fair value	86,948	27,513
Derivative financial instrument | Fair value through profit or loss - FVTPL
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	86,948	27,513
Other assets [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	792,735	518,681
Financial assets, fair value	77,387	109,216
Other assets [Member] | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, fair value	77,387	109,216
Other assets [Member] | Amortized cost
Disclosure of detailed information about financial instruments [line items]
Financial assets, accounting value	R$ 792,735	R$ 518,681

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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: Financial instruments, class [member]; Financial liabilities]

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