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Equity (Details) - Schedule of Bank’s Debts, both Current and Non-Current - CLP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Equity (Details) - Schedule of Bank’s Debts, both Current and Non-Current [Line Items] |  |
Current |  |
Non-current | 608,721 | 590,247
Total | 608,721 | 590,247
Perpetual bond [Member] |  |
Equity (Details) - Schedule of Bank’s Debts, both Current and Non-Current [Line Items] |  |
Current |  |
Non-current | 608,721 | 590,247
Total | $ 608,721 | $ 590,247

X
- Definition Amount of Bank’s debts. + References No definition available. + Details
Name: | bsac_BankDebts
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of non current bank debts. + References No definition available. + Details
Name: | bsac_NoncurrentBankDebts
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current borrowings and current portion of non-current borrowings. + References No definition available. + Details
Name: | bsac_TheAmountOfCurrentBorrowingsAndCurrentPortionOfNonCurrentBorrowings
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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