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Contingencies and Commitments (Details) - Schedule of contractual obligations - CLP ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of Contractual Obligations [Abstract] |  |
Personal guarantees | $ 924,173 | $ 579,051
Personal guarantees in local currency | 483,807 | 349,906
Personal guarantees in foreign currency | 440,366 | 229,145
Letter of credits of merchandise traffic operations | 255,522 | 377,308
Transactions related to contingent events | 1,476,599 | 1,390,410
Transactions related to contingent events in local currency | 1,216,117 | 1,204,670
Transactions related to contingent events in foreign currency | 260,482 | 185,740
Unrestricted prompt cancel credit lines | 8,974,077 | 8,986,535
Other credit commitments | 324,962 | 265,517
Credit for university studies | 1,617 | 2,640
Other irrevocable credit commitments | 323,345 | 262,877
Total | $ 11,945,333 | $ 11,598,821

X
- 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_ScheduleOfContractualObligationsAbstract
Namespace Prefix: | bsac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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