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Financial Liabilities at Amortised Cost (Details) - Schedule of mortgage bonds per currency - CLP ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Schedule of Mortgage Bonds Per Currency [Abstract] |  |
Mortgage bonds in UF | $ 81,623 | $ 81,110
Total mortgage bonds | $ 81,623 | $ 81,110

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- Definition Mortgage bonds in UF. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Total Mortgage bonds. + References No definition available. + Details
Name: | bsac_TotalMortgageBonds
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant