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Pension Plans - Expected Yields (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plans [Abstract]
Type of expected yield from the plan’s assets	0.0250	0.0250	0.0250
Type of yield expected from the reimbursement rights	0.0250	0.0250	0.0250

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- 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

Type Of Expected Yield From Plan Assets

+ References

No definition available.

+ Details

Name:	bsac_TypeOfExpectedYieldFromPlanAssets
Namespace Prefix:	bsac_
Data Type:	xbrli:pureItemType
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:pureItemType
Balance Type:	na
Period Type:	duration