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Expected Credit Losses Allowance (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Expected Credit Losses Allowance [Abstract]
Defaulted loans from mortgage	$ 93,614	$ 91,351

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- Definition

Amount of expected credit loss allowances related to macroeconomy.

+ References

No definition available.

+ Details

Name:	bsac_ExpectedCreditLossAllowancesRelatedToMacroeconomy
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	bsac_ExpectedCreditLossesAllowanceAbstract
Namespace Prefix:	bsac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration