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RISK MANAGEMENT (Details 22) - Capital Risk [Member] - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of risk management strategy related to hedge accounting [line items] |  |
Basic capital | $ 3,239,546 | $ 3,066,180
Regulatory capital | $ 4,101,664 | $ 3,881,252
Basic capital | 7.72% | 7.92%
Regulatory capital | 13.40% | 13.91%

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- Definition Represent information about basic capital. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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

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

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Period Type: |