XML 232 R210.htm IDEA: XBRL DOCUMENT
v3.25.4

Foreign exchange fluctuations (net) (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Foreign Exchange Fluctuations |  |  |
Revenue with Exchange Variations | R$ 510,993,772 | R$ 121,821,934 | R$ 104,400,557
Expenses with Exchange Variations | (521,807,828) | (120,334,255) | (103,335,390)
Total | R$ (10,814,056) | R$ 1,487,679 | R$ 1,065,167

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

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

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

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