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Financial risk management - financial assets and liabilities by contractual term (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	R$ 35,805,528	R$ 19,515,660
Financial liabilities by contractual term	27,956,065	(16,482,563)
Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	10,816,713	7,272,726
Financial liabilities by contractual term	17,153,415	(9,813,691)
From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	4,099,619	2,069,146
Financial liabilities by contractual term	10,506,766	(1,184,793)
Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	20,889,196	10,173,788
Financial liabilities by contractual term	295,884	(5,484,079)
Liabilities with financial institutions
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	5,341,464	1,756,913
Liabilities with financial institutions | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	5,306,020	1,706,681
Liabilities with financial institutions | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	35,444	50,232
Liabilities with customer
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	18,333,543	12,436,632
Liabilities with customer | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	11,360,378	7,550,562
Liabilities with customer | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	6,956,400	607,077
Liabilities with customer | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	16,765	4,278,993
Securities issued [Member]..
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	3,572,093	1,729,436
Securities issued [Member].. | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	112,591	80,924
Securities issued [Member].. | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	3,349,639	505,572
Securities issued [Member].. | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	109,863	1,142,940
Derivative financial instrument
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	66,545	56,758
Derivative financial instrument | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	29,452	20,767
Derivative financial instrument | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	37,093	35,991
Borrowing and onlending [Member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	25,071	27,405
Borrowing and onlending [Member] | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	99	104
Borrowing and onlending [Member] | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	1,087	1,145
Borrowing and onlending [Member] | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	23,886	26,156
Other liabilities [Member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	617,349	475,420
Other liabilities [Member] | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	374,327	475,420
Other liabilities [Member] | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	134,744
Other liabilities [Member] | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial liabilities by contractual term	108,277
Cash and cash equivalents
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	500,446	2,154,687
Cash and cash equivalents | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	500,446	2,154,687
Compulsory deposits at Banco Central do Brasil
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	2,399,488	502,369
Compulsory deposits at Banco Central do Brasil | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	2,399,488	502,369
Amounts due from financial institution
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	2,051,862	1,709,729
Amounts due from financial institution | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	2,051,862	1,207,383
Amounts due from financial institution | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term		502,346
Securities [Member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	12,757,687	5,812,622
Securities [Member] | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	474,509	196,927
Securities [Member] | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	203,451	161,356
Securities [Member] | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	12,079,727	5,454,339
Derivative financial instrument
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	86,948	27,513
Derivative financial instrument | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	86,948	6,510
Derivative financial instrument | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term		21,003
Loans and advances to customers
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	17,216,362	8,790,058
Loans and advances to customers | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	4,616,124	2,795,385
Loans and advances to customers | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	3,868,156	1,357,068
Loans and advances to customers | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	8,732,082	4,637,605
Other assets [Member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	792,735	518,681
Other assets [Member] | Up to 3 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	687,336	409,465
Other assets [Member] | From 3 to 12 months
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	28,012	27,373
Other assets [Member] | Above 1 year
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets by contractual term	R$ 77,387	R$ 81,844

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- Definition

The amount of contractual undiscounted cash flows in relation to financial liabilities.

+ References

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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- Definition

The amount of financial assets held for managing liquidity risk (for example, financial assets that are readily saleable or expected to generate cash inflows to meet cash outflows on financial liabilities). [Refer: Liquidity risk [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph B11E
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_B11E&doctype=Appendix&subtype=B
-URIDate 2021-03-24

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