Name:	bsbr_RevenuePensionPlans
Namespace Prefix:	bsbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of interest income on cash and bank balances at central banks. [Refer: Interest income; Cash and bank balances at central banks]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

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

The amount of interest income on debt instruments held. [Refer: Interest income; Debt instruments held]

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

The amount of interest income on loans and advances to banks. [Refer: Interest income; Loans and advances to banks]

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

The amount of interest income on loans and advances to customers. [Refer: Interest income; Loans and advances to customers]

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

- References

No definition available.

Name:	ifrs-full_NotesAndOtherExplanatoryInformationAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of revenue arising from sources that the entity does not separately disclose in the same statement or note. [Refer: Revenue]