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Financial Liabilities at Amortised Cost (Details) - Schedule of mortgage bonds per currency - CLP ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule of Mortgage Bonds Per Currency [Abstract]
Mortgage bonds in UF	$ 81,623	$ 81,110
Total mortgage bonds	$ 81,623	$ 81,110

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- Definition

Mortgage bonds in UF.

+ References

No definition available.

+ Details

Name:	bsac_MortgageBondsInUF
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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

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- Definition

Total Mortgage bonds.

+ References

No definition available.

+ Details

Name:	bsac_TotalMortgageBonds
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant