Securities - Breakdown of securities (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of financial assets [line items]
Financial assets	R$ 33,406,040	R$ 19,515,659
Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	11,137,938	5,291,154
Amortized cost
Disclosure of financial assets [line items]
Expected loss	(1,602)	(759)
Financial assets	21,402,736	13,991,753
Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	865,365	232,752
Securities [Member]
Disclosure of financial assets [line items]
Financial assets	12,757,687	5,812,622
Securities [Member] \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	11,137,938	5,291,154
Securities [Member] \| Amortized cost
Disclosure of financial assets [line items]
Financial assets	841,333	315,470
Securities [Member] \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	778,417	205,238
Financial Treasury Letters (LFT) \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	6,201,734	2,674,491
Financial Treasury Letters (LFT) \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	65,729
Debentures \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	440,093	98,303
Debentures \| Amortized cost
Disclosure of financial assets [line items]
Securities, gross	185,571	297,881
Financial assets	185,115	297,881
Debentures \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	273,716	19,703
Certificates of real estate receivables \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	307,667	197,703
Certificates of real estate receivables \| Amortized cost
Disclosure of financial assets [line items]
Securities, gross	11,353
Financial assets	11,353
Certificates of real estate receivables \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	41,579	3,061
Real Estate Credit Letters (LCI) \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets		3,656
Real Estate Credit Letters (LCI) \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	7,322
Agribusiness Credit Letters (LCA) \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets		1,573
Agribusiness Credit Letters (LCA) \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	14,552
Investment fund quotas \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	13,719	268,055
Investment fund quotas \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	298,991	182,209
Financial Letters \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	56,439	109,173
Financial Letters \| Amortized cost
Disclosure of financial assets [line items]
Securities, gross	11,676	18,348
Financial assets	11,676	18,348
Financial Letters \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	40,384
Bank Deposits Certificates \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets		10,609
Bank Deposits Certificates \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	25,092
Certificate of Agribusiness Receivables \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets		8,289
Certificate of Agribusiness Receivables \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	10,648	265
National Treasury Bonds (NTN) \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	3,675,236	R$ 1,919,303
National Treasury Bonds (NTN) \| Amortized cost
Disclosure of financial assets [line items]
Securities, gross	606,260
Financial assets	605,120
National Treasury Bonds (NTN) \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	403
National Financial Treasury Letters (LTN) \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	412,963
National Financial Treasury Letters (LTN) \| Fair value through profit or loss - FVTPL
Disclosure of financial assets [line items]
Financial assets	403
Commercial Promissory Note \| Fair value through other comprehensive income - FVOCI
Disclosure of financial assets [line items]
Financial assets	30,087
Rural Product Bill \| Amortized cost
Disclosure of financial assets [line items]
Securities, gross	28,075
Financial assets	R$ 28,075