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Securities - Breakdown of the carrying amount of securities by maturity (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Accounting balance	R$ 33,406,040	R$ 19,515,659
Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	11,137,938	5,291,154
Amortized cost
Disclosure of financial assets [line items]
Accounting balance	21,402,736	13,991,753
Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	865,365	232,752
Securities [Member]
Disclosure of financial assets [line items]
Accounting balance	12,757,687	5,812,622
Securities [Member] | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	474,509	196,927
Securities [Member] | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	203,379	161,356
Securities [Member] | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	1,283,915	1,524,002
Securities [Member] | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	2,308,798	436,656
Securities [Member] | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	8,487,086	3,493,681
Securities [Member] | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	11,137,938	5,291,154
Securities [Member] | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	841,333	315,470
Securities [Member] | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	778,417	205,238
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	6,201,734	2,674,491
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	70,669
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	129,144	36,186
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	781,179	1,277,359
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	1,400,473	145,314
Financial Treasury Letters (LFT) | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	3,820,269	1,215,632
Financial Treasury Letters (LFT) | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	65,729
Financial Treasury Letters (LFT) | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	22,752
Financial Treasury Letters (LFT) | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	18,127
Financial Treasury Letters (LFT) | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	14,782
Financial Treasury Letters (LFT) | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	10,068
Debentures | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	440,093	98,303
Debentures | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	2,591	5
Debentures | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	78,600	6,365
Debentures | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	172,128	61,162
Debentures | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	186,774	30,771
Debentures | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	185,115	297,881
Debentures | Amortized cost | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	35,186	30,458
Debentures | Amortized cost | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	124,940	193,533
Debentures | Amortized cost | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	24,989	73,890
Debentures | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	273,716	19,703
Debentures | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	16,690
Debentures | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	103	256
Debentures | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	42,542	1,306
Debentures | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	127,525	2,963
Debentures | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	86,856	15,178
Certificates of real estate receivables | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	307,667	197,703
Certificates of real estate receivables | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		38,893
Certificates of real estate receivables | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	49,524	3,721
Certificates of real estate receivables | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	50,293	132,333
Certificates of real estate receivables | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	207,850	22,756
Certificates of real estate receivables | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	11,353
Certificates of real estate receivables | Amortized cost | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	11,353
Certificates of real estate receivables | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	41,579	3,061
Certificates of real estate receivables | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	7,694
Certificates of real estate receivables | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	2,311	983
Certificates of real estate receivables | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	13,683	778
Certificates of real estate receivables | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	7,310	1,300
Certificates of real estate receivables | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	10,581
Investment fund quotas | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	13,719	268,055
Investment fund quotas | Fair value through other comprehensive income - FVOCI | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	13,719	10,615
Investment fund quotas | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		42,114
Investment fund quotas | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		21,502
Investment fund quotas | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance		193,824
Investment fund quotas | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	298,991	182,209
Investment fund quotas | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	298,992	182,209
Financial Letters | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	56,439	109,173
Financial Letters | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	13,089
Financial Letters | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	14,686	16,937
Financial Letters | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	28,664	92,236
Financial Letters | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	11,676	18,348
Financial Letters | Amortized cost | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	11,669	7,207
Financial Letters | Amortized cost | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		11,141
Financial Letters | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	40,384
Financial Letters | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	1,146
Financial Letters | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	31,224
Financial Letters | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	3,248
Financial Letters | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	4,766
Certificate of Agribusiness Receivables | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance		8,289
Certificate of Agribusiness Receivables | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		3,273
Certificate of Agribusiness Receivables | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		3,143
Certificate of Agribusiness Receivables | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance		1,319
Certificate of Agribusiness Receivables | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance		554
Certificate of Agribusiness Receivables | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	10,648	265
Certificate of Agribusiness Receivables | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		83
Certificate of Agribusiness Receivables | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance		182
National Treasury Bonds (NTN) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	3,675,236	1,919,303
National Treasury Bonds (NTN) | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		0
National Treasury Bonds (NTN) | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	150,298	474
National Treasury Bonds (NTN) | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	3,524,938	1,918,829
National Treasury Bonds (NTN) | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	605,120
National Treasury Bonds (NTN) | Amortized cost | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	605,120
National Treasury Bonds (NTN) | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	403
National Financial Treasury Letters (LTN) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	412,963
National Financial Treasury Letters (LTN) | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	403
National Financial Treasury Letters (LTN) | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	403
Letters National Treasury Bills (LTN) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	412,963
Letters National Treasury Bills (LTN) | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	101,491
Letters National Treasury Bills (LTN) | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	311,472
Real Estate Credit Letters (LCI) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance		3,656
Real Estate Credit Letters (LCI) | Fair value through other comprehensive income - FVOCI | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance		2,646
Real Estate Credit Letters (LCI) | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		382
Real Estate Credit Letters (LCI) | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		628
Real Estate Credit Letters (LCI) | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	7,322
Real Estate Credit Letters (LCI) | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	6,772
Real Estate Credit Letters (LCI) | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	353
Real Estate Credit Letters (LCI) | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	197
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance		10,609
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance		1,456
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		1,585
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		3,550
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance		577
Bank Deposits Certificates | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance		3,441
Bank Deposits Certificates | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	25,092
Bank Deposits Certificates | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	265
Bank Deposits Certificates | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	7,860
Bank Deposits Certificates | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	14,260
Bank Deposits Certificates | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	1,507
Bank Deposits Certificates | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	1,200
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance		1,573
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance		1
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance		14
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance		893
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance		387
Agribusiness Credit Letters (LCA) | Fair value through other comprehensive income - FVOCI | Above 5 years
Disclosure of financial assets [line items]
Accounting balance		R$ 278
Agribusiness Credit Letters (LCA) | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	14,552
Agribusiness Credit Letters (LCA) | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	14,552
Commercial Promissory Note | Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Accounting balance	30,087
Commercial Promissory Note | Fair value through other comprehensive income - FVOCI | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	30,087
Rural Product Bill | Amortized cost
Disclosure of financial assets [line items]
Accounting balance	28,075
Rural Product Bill | Amortized cost | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	13,016
Rural Product Bill | Amortized cost | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	15,059
Shares in publicly listed companies | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	0
Shares in publicly listed companies | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	0
Shares in publicly listed companies | Fair value through profit or loss - FVTPL | From 3 to 12 months
Disclosure of financial assets [line items]
Accounting balance	0
Shares in publicly listed companies | Fair value through profit or loss - FVTPL | 1 year to 3 years
Disclosure of financial assets [line items]
Accounting balance	0
Shares in publicly listed companies | Fair value through profit or loss - FVTPL | From 3 to 5 years
Disclosure of financial assets [line items]
Accounting balance	0
Shares in publicly listed companies | Fair value through profit or loss - FVTPL | Above 5 years
Disclosure of financial assets [line items]
Accounting balance	0
Certificates of Agricultural Receivables | Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Accounting balance	10,648
Certificates of Agricultural Receivables | Fair value through profit or loss - FVTPL | Up to 3 months
Disclosure of financial assets [line items]
Accounting balance	R$ 10,648

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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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