XML 147 R125.htm IDEA: XBRL DOCUMENT
v3.25.4

Derivative financial instruments (Details 4) - 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
Option contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 724,241,728 | 538,580,487
Futures contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 567,709,896 | 785,337,224
Forward Contracts And Other [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 480,123,205 | 443,722,256
Stock Exchange [Member] | Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 71,829,722 | 167,924,413
Stock Exchange [Member] | Option contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 539,875,480 | 415,336,707
Stock Exchange [Member] | Futures contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 567,339,980 | 781,708,536
Stock Exchange [Member] | Forward Contracts And Other [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 20,496,769 | 55,754,746
Over The Countr [Member] | Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 1,019,522,423 | 690,353,000
Over The Countr [Member] | Option contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 184,366,248 | 123,243,780
Over The Countr [Member] | Futures contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | 369,916 | 3,628,688
Over The Countr [Member] | Forward Contracts And Other [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Notional amount | R$ 459,626,436 | R$ 387,967,510

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_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_ForwardContractsAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bsbr_ClassesOfMarketTradingAxis=bsbr_StockExchangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bsbr_ClassesOfMarketTradingAxis=bsbr_OverTheCountrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |