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v3.19.1

RISK MANAGEMENT (Details 5) - Probability Weighting [Member] | Dec. 31, 2018
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Local Scenario [Member] | Favorable Scenario 1 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 20.00%
Local Scenario [Member] | Base Scenario [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 50.00%
Local Scenario [Member] | Unfavorable Scenario 1 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 20.00%
Local Scenario [Member] | Unfavorable Scenario 2 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 5.00%
Local Scenario [Member] | Favorable Scenario 2 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 5.00%
Global Scenario [Member] | Favorable Scenario 1 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 20.00%
Global Scenario [Member] | Base Scenario [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 60.00%
Global Scenario [Member] | Unfavorable Scenario 1 [Member] |
Disclosure of risk management strategy related to hedge accounting [line items] |
Percentage of probabilities scenarios | 20.00%

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- Definition Represent percentage of probabilities scenarios. + References No definition available. + Details
Name: | bsac_PercentageOfProbabilitiesScenarios
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
Name: | ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_RangeAxis=bsac_ProbabilityWeightingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_MacroeconomicAxis=bsac_LocalScenarioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_ScenariosAxis=bsac_FavorableScenarioOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_ScenariosAxis=bsac_BaseScenarioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_ScenariosAxis=bsac_UnfavorableScenarioOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_ScenariosAxis=bsac_UnfavorableScenarioTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_ScenariosAxis=bsac_FavorableScenarioTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | bsac_MacroeconomicAxis=bsac_GlobalScenarioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |