XML 146 R124.htm IDEA: XBRL DOCUMENT
v3.25.4

Derivative financial instruments (Details 3) - BRL (R$) R$ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | R$ 1,091,352,145 | R$ 858,277,413
Swap contract [member] | Up To 3 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 215,444,602 | 118,831,333
Swap contract [member] | From 3 To 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 122,788,587 | 142,493,857
Swap contract [member] | Over 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 753,118,956 | 596,952,223
Option contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 724,241,728 | 538,580,487
Option contract [member] | Up To 3 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 235,359,167 | 80,264,346
Option contract [member] | From 3 To 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 389,872,228 | 375,497,526
Option contract [member] | Over 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 99,010,333 | 82,818,615
Futures contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 567,709,896 | 785,337,224
Futures contract [member] | Up To 3 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 158,211,486 | 415,684,910
Futures contract [member] | From 3 To 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 157,998,367 | 197,209,979
Futures contract [member] | Over 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 251,500,043 | 172,442,335
Forward Contracts And Others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 480,123,205 | 443,722,256
Forward Contracts And Others [Member] | Up To 3 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 270,558,427 | 273,869,288
Forward Contracts And Others [Member] | From 3 To 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 118,706,257 | 104,483,252
Forward Contracts And Others [Member] | Over 12 Months [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | R$ 90,858,521 | R$ 65,369,716

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

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_SwapContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=bsbr_UpTo3MonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=bsbr_From3To12MonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=bsbr_Over12MonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_OptionContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_FuturesContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=bsbr_ForwardContractsAndOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |