Securities - Summary of Securities Classified by Maturity (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Financial assets	R$ 127,745,263	R$ 90,190,827
Financial liabilities	91,358,151	70,600,989
At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	2,146,398	2,237,442
Non-current financial liabilities	518,804	0
Evaluated at amortized cost
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	0	0
Non-current financial liabilities	0	0
Non-stated maturity \| At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	2,146,398	2,237,442
Up to 3 months \| At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	0	0
Up to 3 months \| Evaluated at amortized cost
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	0	0
From 3 to 12 months
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	9,707,072	5,031,715
From 3 to 12 months \| At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	0	0
From 3 to 12 months \| Evaluated at amortized cost
Disclosure of detailed information about financial instruments [line items]
Current financial liabilities	0	0
After one year \| At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Non-current financial liabilities	518,804	0
After one year \| Evaluated at amortized cost
Disclosure of detailed information about financial instruments [line items]
Non-current financial liabilities	0	0
At fair value through PL and at OCI
Disclosure of detailed information about financial instruments [line items]
Current financial assets	47,431,624	34,572,107
Non-current financial assets	43,088,235	34,065,805
At fair value through PL and at OCI \| Non-stated maturity
Disclosure of detailed information about financial instruments [line items]
Current financial assets	31,425,792	15,246,105
At fair value through PL and at OCI \| Up to 3 months
Disclosure of detailed information about financial instruments [line items]
Current financial assets	4,556,261	794,025
At fair value through PL and at OCI \| From 3 to 12 months
Disclosure of detailed information about financial instruments [line items]
Current financial assets	11,449,571	18,531,977
At fair value through PL and at OCI \| After one year
Disclosure of detailed information about financial instruments [line items]
Non-current financial assets	43,088,235	34,065,805
Evaluated at amortized cost
Disclosure of detailed information about financial instruments [line items]
Current financial assets	1,891,889	1,829,791
Non-current financial assets	349,415	0
Evaluated at amortized cost \| Up to 3 months
Disclosure of detailed information about financial instruments [line items]
Current financial assets	1,698,760	1,623,487
Evaluated at amortized cost \| From 3 to 12 months
Disclosure of detailed information about financial instruments [line items]
Current financial assets	193,129	206,304
Evaluated at amortized cost \| After one year
Disclosure of detailed information about financial instruments [line items]
Non-current financial assets	349,415	0
Fair value
Disclosure of detailed information about financial instruments [line items]
Financial assets	92,761,163	70,467,703
Financial liabilities	R$ 2,665,202	R$ 2,237,442

The amount of current financial assets. [Refer: Financial assets]

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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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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) 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 deliver 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, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are 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. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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The amount of non-current financial assets. [Refer: Financial assets]

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