XML 262 R240.htm IDEA: XBRL DOCUMENT v3.25.4

Risk management (Details 7) - BRL (R$) R$ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Risk Management
Net Interest Margin	R$ 369	R$ 798	R$ 754
Fair value of Equity	1,664	2,643	1,924
Value at Risk	R$ 469	R$ 731	R$ 415

X

- References

No definition available.

+ Details

Name:	bsbr_DisclosureRiskManagementAbstract
Namespace Prefix:	bsbr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	bsbr_SensibilitiesMarketValueOfEquity
Namespace Prefix:	bsbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	bsbr_SensibilitiesNetInterestMargin
Namespace Prefix:	bsbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The measure of a potential loss exposure as a result of future market movements, based on a specified confidence interval and measurement horizon.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 41
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_41&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ValueAtRisk
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant