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Fair Value of Financial Assets and Liabilities (Details) - Narrative	12 Months Ended
	Dec. 31, 2024
Interest income and interest expense for financial assets or financial liabilities not at fair value through profit or loss [abstract]
Observable market valued rate	100.00%

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- Definition

Observable market are valued rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	bsac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	ifrs-full_InterestIncomeAndInterestExpenseForFinancialAssetsOrFinancialLiabilitiesNotAtFairValueThroughProfitOrLossAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration