XML 267 R245.htm IDEA: XBRL DOCUMENT
v3.25.4

Subsequent Events (Details Narrative) | Jan. 09, 2026 BRL (R$)
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Nonadjusting Event [Member] |
IfrsStatementLineItems [Line Items] |
Distribution of interim dividend | R$ 2,000,000,000

X
- References No definition available. + Details
Name: | bsbr_DistributionofInterimDividend
Namespace Prefix: | bsbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | bsbr_IfrsStatementLineItems
Namespace Prefix: | bsbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=bsbr_NonadjustingEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |