XML 260 R238.htm IDEA: XBRL DOCUMENT
v3.25.4

Risk management (Details 5) - BRL (R$) R$ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Demand deposits | R$ 29,994 | R$ 40,398
Demand deposits Percentage | 100.00% | 100.00%
Savings accounts | R$ 52,989 | R$ 57,369
Savings accounts Percentage | 100.00% | 100.00%
Time deposits | R$ 414,479 | R$ 403,686
Time deposits Percentage | 29.00% | 26.00%
Interbank deposit | R$ 6,022 | R$ 5,850
Interbank deposit percentage | 20.00% | 18.00%
Funds from acceptances and issuance of securities | R$ 177,693 | R$ 151,686
Funds from acceptances and issuance of securities percentage | 6.00% | 7.00%
Borrowings and Onlendings | R$ 109,594 | R$ 105,768
Borrowings and Onlendings percentage | 12.00% | 9.00%
Subordinated Debts / Debt Instruments Eligible to Compose Capital | R$ 28,305 | R$ 23,125
Subordinated Debts / Debt Instruments Eligible to Compose Capital percentage |  |
Total | R$ 819,076 | R$ 787,882
Total percentage | 28.00% | 28.00%
Customers Funding 0 Days 30 [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Demand deposits | R$ 29,994 | R$ 40,398
Savings accounts | 52,989 | 57,369
Time deposits | 118,994 | 103,569
Interbank deposit | 1,207 | 1,058
Funds from acceptances and issuance of securities | 11,414 | 11,237
Borrowings and Onlendings | 13,175 | 9,959
Subordinated Debts / Debt Instruments Eligible to Compose Capital |  |
Total | R$ 227,773 | R$ 223,590

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | bsbr_CustomersFundingAxis=bsbr_CustomersFunding0Days30Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |