XML 175 R153.htm IDEA: XBRL DOCUMENT
v3.25.4

Intangible assets - Goodwill (Details) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Banco Real [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Criteria for determining the recoverable amount | Value in use: cash flows | Value in use: cash flows
Period of cash flow projections (1) | 5 years | 5 years
Perpetual growth rate (1) | 4.00% | 4.50%
Pre-tax discount rate (2) | 18.50% | 20.80%
Discount rate (2) | 12.20% | 13.60%
Em Dia [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Criteria for determining the recoverable amount | Value in use: cash flows |
Period of cash flow projections (1) | 5 years |
Perpetual growth rate (1) | 3.60% |
Discount rate (2) | 13.80% |
Toro Corretora [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Criteria for determining the recoverable amount | Value in use: cash flows |
Period of cash flow projections (1) | 5 years |
Perpetual growth rate (1) | 3.60% |
Discount rate (2) | 14.50% |

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

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

X
- References No definition available. + Details
Name: | bsbr_MainAssumptionsDiscountRate
Namespace Prefix: | bsbr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- References No definition available. + Details
Name: | bsbr_MainAssumptionsPerpetualGrowthRate
Namespace Prefix: | bsbr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | bsbr_MainAssumptionsPretaxDiscountRate
Namespace Prefix: | bsbr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bsbr_BancoRealMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bsbr_EmDiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=bsbr_ToroCorretoraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |