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Risk Management (Details) - Schedule of levels of basic capital and effective net equity - CLP ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Schedule of levels of basic capital and effective net equity [Abstract] |  |
Basic capital | $ 3,400,220 | $ 3,567,916
Basic capital | 5.72% | 6.69%
Regulatory capital | $ 5,184,363 | $ 5,143,843
Regulatory capital | 14.49% | 15.37%

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- Definition Represent information about basic capital. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represent information about basic capital percent. + References No definition available. + Details
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Data Type: | num:percentItemType
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- Definition Represent information about regulatory capital percent. + References No definition available. + Details
Name: | bsac_RegulatoryCapitalPercent
Namespace Prefix: | bsac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | bsac_RegulatoryCapitals
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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