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Transactions With Related Parties (Details) - Schedule of Personnel Salaries and Expenses - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Related party transactions [abstract] |  |  |
Personnel compensation | $ 21,652 | $ 21,409 | $ 20,280
Board members’ salaries and expenses | 1,794 | 1,711 | 1,692
Bonuses or gratifications | 17,814 | 16,402 | 17,794
Stock-based benefits | (825) | 2,119 | (1,169)
Seniority compensation | 15 | 2,312 | 6
Pension plans | 0 | (1,251) | 849
Training expenses | 0 | 38 | 50
Health funds | 393 | 374 | 357
Other personnel expenses | 755 | (386) | 791
Total | $ 41,598 | $ 42,728 | $ 40,650

X
- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensation1
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of professional compensation paid to key management. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represent information about key management personnel compensation bonuses or gratifications. + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationBonusesOrGratifications
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represent information about key management personnel compensation health funds. + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationHealthFunds
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of compensation to key management personnel in the form of other long-term employee benefits. [Refer: Other long-term employee benefits; Key management personnel of entity or parent [member]] + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationOtherLongtermBenefits1
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represent information about key management personnel compensation personnel compensation. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represent information about key management personnel compensation seniority compensation. + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationSeniorityCompensation
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of compensation to key management personnel in the form of share-based benefits. + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationStockbasedBenefits
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represent information about key management personnel compensation training expenses. + References No definition available. + Details
Name: | bsac_KeyManagementPersonnelCompensationTrainingExpenses
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of key management pension plans. + References No definition available. + Details
Name: | bsac_PensionPlans
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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