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Contingencies and Commitments (Details) - Schedule of Bank’s Contractual Obligations - CLP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Schedule of Bank’s Contractual Obligations [Abstract] |  |
Personal guarantees | $ 494,104 | $ 924,173
Personal guarantees in local currency | 193,144 | 483,807
Personal guarantees in foreign currency | 300,960 | 440,366
Letter of credits of merchandise traffic operations | 262,496 | 255,522
Transactions related to contingent events | 1,641,510 | 1,476,599
Transactions related to contingent events in local currency | 1,179,242 | 1,216,117
Transactions related to contingent events in foreign currency | 462,268 | 260,482
Unrestricted prompt cancel credit lines | 9,490,141 | 8,974,077
Other credit commitments | 314,318 | 314,962
Credit for university studies | 813 | 1,617
Other irrevocable credit commitments | 313,505 | 313,345
Total | $ 12,202,569 | $ 11,945,333

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- Definition Credit for university studies. + References No definition available. + Details
Name: | bsac_CreditForUniversityStudies
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Letter of credits of merchandise traffic operations. + References No definition available. + Details
Name: | bsac_LetterOfCreditsOfMerchandiseTrafficOperations
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other credit commitments. + References No definition available. + Details
Name: | bsac_OtherCreditCommitments
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represent information about other irrevocable credit commitments. + References No definition available. + Details
Name: | bsac_OtherIrrevocableCreditCommitments
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Personal guarantees. + References No definition available. + Details
Name: | bsac_PersonalGuarantees
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Personal guarantees in foreign currency. + References No definition available. + Details
Name: | bsac_PersonalGuaranteesInForeignCurrency
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Personal guarantees in local currency. + References No definition available. + Details
Name: | bsac_PersonalGuaranteesInLocalCurrency
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Represent information about total contractual obligations to issue loans. + References No definition available. + Details
Name: | bsac_TotalContractualObligationsToIssueLoans
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Transactions related to contingent events. + References No definition available. + Details
Name: | bsac_TransactionsRelatedToContingentEvents
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Transactions related to contingent events in foreign currency. + References No definition available. + Details
Name: | bsac_TransactionsRelatedToContingentEventsInForeignCurrency
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Transactions related to contingent events in local currency. + References No definition available. + Details
Name: | bsac_TransactionsRelatedToContingentEventsInLocalCurrency
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unrestricted prompt cancel credit lines. + References No definition available. + Details
Name: | bsac_UnrestrictedPromptCancelCreditLines
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant