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Debt Instruments at Amortized Cost (Details)	12 Months Ended
	Dec. 31, 2021 CLP ($)
Debt Instruments At Amortized Cost [Abstract]
Risk provision of amounted	$ 711

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- References

No definition available.

+ Details

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

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- Definition

Risk Provision of Amounted.

+ References

No definition available.

+ Details

Name:	bsac_RiskProvisionOfAmounted
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration