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Financial Assets at Amortised Cost (Details) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Financial Assets at Amortised Cost (Details) [Line Items] |  |
Credit risk provision amount | $ 155,903 | $ 105,837
Loan from Mortgage | $ 93,614 |
Macro-economic information and scenarios, description | the Bank updated the macro-economic information and scenarios, resulting in an increase of ECL allowance of MCh$73,000, which were covered with post-model adjustment previously recorded. As of December 31, 2022 the Bank maintained MCh$91,351 in residual overlays, to face future macro-economic information and scenarios updates and to cover certain defaulted loans from mortgage and other commercial portfolios. |
Finance Lease For Real Estate [Member] |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |
ECL allowance | $ 50,935 |
Significant Increase in Credit Risk [Member] |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |
ECL allowance | 863 |
OR Criteria [Member] |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |
ECL allowance | $ 22,175 |

X
- Definition Amount of expense related to credit loss from transactions other than loan and lease transactions. + References No definition available. + Details
Name: | bsac_CreditRiskProvisionAmount
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Credit Loss Allowance. + References No definition available. + Details
Name: | bsac_ExpectedCreditLossAllowance
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount of loan from mortgage and other commercial portfolios. + References No definition available. + Details
Name: | bsac_LoanFromMortgage
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Macro-economic information and scenarios, description. + References No definition available. + Details
Name: | bsac_MacroeconomicInformationAndScenariosDescription
Namespace Prefix: | bsac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=bsac_FinanceLeaseForRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=bsac_SignificantIncreaseInCreditRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=bsac_ORCriteriaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |