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Risk Management (Details) - Schedule of Solvency Indicators and Regulatory Compliance Indicators According to Basel III | Dec. 31, 2023 | Dec. 31, 2022
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Schedule of Solvency Indicators and Regulatory Compliance Indicators According to Basel III [Abstract] |  |
Leverage indicator (T1_I18/T1_I7) | 6.66% | 6.87%
Leverage indicator that the bank must meet, considering the minimum requirements | 3.00% | 3.00%
Basic capital indicator (T1_I18/T1_I11,b) | 11.12% | 11.08%
Basic capital indicator that the bank must meet, considering the minimum requirements | 5.25% | 4.88%
Capital buffer shortfall |  |
Tier 1 capital indicator (T1_I25/T1_I11,b) | 12.66% | 13.13%
Tier 1 capital indicator that the bank must meet, considering the minimum requirements | 6.75% | 6.38%
Effective equity indicators (T1_I31/T1_I11,b) | 17.64% | 17.77%
Effective equity indicator that the bank must meet, considering the minimum requirements | 8.75% | 8.38%
Effective equity indicator that the bank must meet, considering the charge for article 35 bis, if applicable | 8.00% | 8.00%
Effective equity indicator that the bank must meet, considering the minimum requirements, conservation buffer and anti-cyclical buffer | 10.63% | 9.63%
Voluntary (additional) provisions allocated to Tier 2 capital (T2) in relation to APRCs (T1_I26/ (T1_I8,a or I8,b) | 0.97% | 1.03%
Subordinated bonds allocated to Tier 2 (T2) capital in relation to Tier 2 capital | 38.18% | 34.96%
Additional Tier 1 capital (AT1) in relation to basic capital (T1_I24/T1_I18) | 13.84% | 18.52%
Voluntary provisions (additional) and subordinated bonds that are charged to additional capital level 1 (AT1) in relation to the RWAs (T1_I19+T1_I20 / T1_I11,b) | 0.00% | 0.50%

X
- Definition The percentage of additional Tier 1 capital (AT1) in relation to basic capital. + References No definition available. + Details
Name: | bsac_AdditionalTier1CapitalAT1InRelationToBasicCapital
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Basic capital indicator. + References No definition available. + Details
Name: | bsac_BasicCapitalIndicator
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of basic capital indicator that the bank must meet, considering the minimum requirements. + References No definition available. + Details
Name: | bsac_BasicCapitalIndicatorMinimumRequirements
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of capital buffer shortfall. + References No definition available. + Details
Name: | bsac_CapitalBufferShortfall
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of effective equity indicator that the bank must meet, considering the charge for article 35 bis, if applicable. + References No definition available. + Details
Name: | bsac_EffectiveEquityIndicator
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage effective equity indicator that the bank must meet, considering the minimum requirements, conservation buffer and anti-cyclical buffer. + References No definition available. + Details
Name: | bsac_EffectiveEquityIndicatorConsideringMinimumRequirementsConservationBufferAndAntiCyclicalBuffer
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of effective equity indicator that the bank must meet, considering the minimum requirements. + References No definition available. + Details
Name: | bsac_EffectiveEquityIndicatorThatTheBankMustMeetConsideringTheMinimumRequirements
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Effective equity indicators. + References No definition available. + Details
Name: | bsac_EffectiveEquityIndicators
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Leverage indicator. + References No definition available. + Details
Name: | bsac_LeverageIndicator
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of leverage indicator that the bank must meet, considering the minimum requirements. + References No definition available. + Details
Name: | bsac_LeverageIndicatorMinimumRequirement
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The percentage of subordinated bonds allocated to Tier 2 (T2) capital in relation to Tier 2 capital. + References No definition available. + Details
Name: | bsac_SubordinatedBondsAllocatedToTier2T2CapitalInRelationToTier2Capital
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tier 1 capital indicator. + References No definition available. + Details
Name: | bsac_TierOneCapitalIndicator
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of tier 1 capital indicator that the bank must meet, considering the minimum requirements. + References No definition available. + Details
Name: | bsac_TierOneCapitalIndicatorThatTheBankMustMeetConsideringTheMinimumRequirements
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of voluntary provisions (additional) and subordinated bonds that are charged to additional capital. + References No definition available. + Details
Name: | bsac_VoluntaryProvisionsadditionalAndSubordinatedBondsThatAreChargedToAdditionalCapital
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage voluntary (additional) provisions allocated to Tier 2 capital (T2) in relation to APRCs. + References No definition available. + Details
Name: | bsac_VoluntaryadditionalProvisionsAllocatedToTierTwoCapitalTTwoInRelationToAPRCs
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant