XML 142 R120.htm IDEA: XBRL DOCUMENT
v3.25.4

Equity instruments (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Equity Instruments |  |  |
Balance at the beginning of the fiscal year | R$ 19,633 | R$ 15,953 | R$ 33,493
Additions/Disposals (Net) | 72,730 | 3,680 | (17,540)
Balance at the end of the fiscal year | R$ 92,363 | R$ 19,633 | R$ 15,953

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

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

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

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