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Pension Plans (Details) - CLP ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Pension Plans [Abstract]
Duties when turning over period	60 years
Plan assets	$ 5,260	$ 6,819

X

- Definition

Duties when turning over period.

+ References

No definition available.

+ Details

Name:	bsac_DutiesWhenTurningOverPeriod
Namespace Prefix:	bsac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Pension Plans [Abstract]

+ References

No definition available.

+ Details

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

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- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

No definition available.

+ Details

Name:	bsac_PlanAssetsAtFairValues
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant