XML 193 R171.htm IDEA: XBRL DOCUMENT
v3.25.4

Obligations for pension and similar liabilities (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Obligations For Pension And Similar Liabilities |  |  |
Post-Employment Plans, Personnel expenses - Costs of current services | R$ 255 | R$ 586 | R$ (911)
Other Similar Obligations, Personnel expenses - Costs of current services | 5,586 | 5,694 | 4,903
Post-Employment Plans, Interest and similar income and expenses - Interest cost (net) | (322,599) | (115,866) | (198,288)
Other Similar Obligations, Interest and similar income and expenses - Interest cost (net) | (41,947) | (52,667) | (42,656)
Post-Employment Plans, Interest and similar income and expenses - Interest on unrecognized assets | 363,660 | 273,924 | 308,381
Other Similar Obligations, Interest and similar income and expenses - Interest on unrecognized assets | 89,781 | 99,728 | 84,729
Post-Employment Plans, Other movements - Extraordinary charges | (30) | (67) | (280)
Other Similar Obligations, Other movements - Extraordinary Charges |  |  | (91)
Post-Employment Plans, Total | 41,286 | 158,577 | 108,902
Other Similar Obligations, Total | R$ 53,420 | R$ 52,755 | R$ 46,885

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

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

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

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

X
- References No definition available. + Details
Name: | bsbr_OtherSimilarObligationsOtherMovements
Namespace Prefix: | bsbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

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

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