Loan and Lease Operations - Summary of Finance Lease Income (Detail) - BRL (R$) R$ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of quantitative information about leases for lessor [abstract]
Financial Income	R$ 742	R$ 645	R$ 612
Variable payments	10	40	39
Total	R$ 752	R$ 685	R$ 651

The amount of income relating to variable lease payments not included in the measurement of the net investment in the finance lease. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Net investment in finance lease]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2021-01-01
-Paragraph 90
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_90_a_iii&doctype=Standard
-URIDate 2021-03-24

Name:	ifrs-full_IncomeRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfNetInvestmentInFinanceLease
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration