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Pension Plans (Details) - CLP ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of employee benefits [text block] [Abstract] |  |
Duties when turning over period | 60 years |
Plan assets | $ 7,200 | $ 8,224

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

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- Definition Duties when turning over period. + References No definition available. + Details
Name: | bsac_DutiesWhenTurningOverPeriod
Namespace Prefix: | bsac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References No definition available. + Details
Name: | bsac_PlanAssetsAtFairValues
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant