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Pension Plans (Details) - Schedule of plan expected profit	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of plan expected profit [Abstract]
Type of expected yield from the plan’s assets	UF + 2.50% annually	UF + 2.50% annually	UF + 2.50% annually
Type of yield expected from the reimbursement rights	UF + 2.50% annually	UF + 2.50% annually	UF + 2.50% annually

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- References

No definition available.

+ Details

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

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- Definition

Represent information about the type of expected yield from the plan’s assets.

+ References

No definition available.

+ Details

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

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- Definition

Represent information about the type of expected yield from the reimbursement rights.

+ References

No definition available.

+ Details

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