Additional Pillar II Capital Requirements Bank Applied, Percentage

No definition available.

Name:	bsac_AdditionalPillarIICapitalRequirementsBankAppliedPercentage
Namespace Prefix:	bsac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount Of Next Three Interest Coupons On Bonds Without A Fixed Maturity Date

+ References

No definition available.

+ Details

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

- Definition

The amount of bond issued.

+ References

No definition available.

+ Details

Name:	bsac_BondIssuedAmount
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Commitment To Receive Loan

+ References

No definition available.

+ Details

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

- Definition

The Percentage of distribution and payment of dividends.

+ References

No definition available.

+ Details

Name:	bsac_DistributionAndPaymentOfDividendsPercentage
Namespace Prefix:	bsac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of an expected dividend used to calculate the fair value of per share options granted.

+ References

No definition available.

+ Details

Name:	bsac_ExpectedDividendPerShareOptionsGranted
Namespace Prefix:	bsac_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase In Capital, Amount

+ References

No definition available.

+ Details

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

- Definition

Increase The Reserves And Other Retained Profits Of The Bank

+ References

No definition available.

+ Details

Name:	bsac_IncreaseTheReservesAndOtherRetainedProfitsOfTheBank
Namespace Prefix:	bsac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of entity remaining revenue.

+ References

No definition available.

+ Details

Name:	bsac_PercentageOfEntityRemainingRevenue
Namespace Prefix:	bsac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Subsidiary To Be Sold, That Was Voted On By The Board

+ References

No definition available.

+ Details

Name:	bsac_PercentageOfSubsidiaryToBeSoldThatWasVotedOnByTheBoard
Namespace Prefix:	bsac_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Significant Events [Line Items]

+ References

No definition available.

+ Details

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

- Definition

The amount of dividends recognised as distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 107
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_107&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_DividendsPaid
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for dividends paid by the entity, classified as financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 31
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_31&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_DividendsPaidClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of dividends paid per ordinary share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 34
-IssueDate 2024-01-01
-Paragraph 16A
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=34&code=ifrs-tx-2024-en-r&anchor=para_16A_f&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_DividendsPaidOrdinarySharesPerShare
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 17
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17_d&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=bsac_SociedadOperadoraDeTarjetasDePagoSantanderGetnetChileSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=bsac_InternationalFinanceCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	bsac_TypesOfCurrencyAxis=bsac_USDMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=bsac_A144AMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=bsac_SeniorBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bsac_SantanderSASociedadSecuritizadoraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bsac_OperadoraDeTarjetaDePagoSantanderGetnetChileS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bsac_CentroDeCompensacionAutomatizadoS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=bsac_BancoSantanderChileMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Significant Events (Details) $ / shares in Units, $ / shares in Units, CLF in Thousands, $ in Thousands, ¥ in Millions, SFr in Millions, $ in Millions									1 Months Ended		2 Months Ended	12 Months Ended
	Dec. 29, 2025 USD ($)	Dec. 23, 2025 CLP ($)	Sep. 30, 2025 CLP ($)	Apr. 23, 2025 CLP ($)	Apr. 22, 2025 CLP ($) $ / shares	Apr. 22, 2025 USD ($)	Apr. 15, 2025	Jan. 10, 2025 USD ($)	Jun. 30, 2025	May 31, 2025 CLP ($)	Mar. 31, 2025 CLP ($)	Dec. 31, 2025 CLP ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 CLF	Dec. 31, 2025 CHF (SFr)	Dec. 31, 2025 JPY (¥)	Dec. 31, 2024 CLP ($)	Dec. 31, 2024 $ / shares	Dec. 31, 2023 CLP ($)	Dec. 30, 2025	Nov. 21, 2025
Significant Events [Line Items]
Distribution and payment of dividends, percentage					70.00%	70.00%											70.00%
Shareholders dividend per share (in Pesos per share) \| $ / shares																		$ 3.18571574
Profits used to increase the banks reserves					30.00%	30.00%											30.00%
Dividends recognised as distributions to owners					$ 600,336	$ 857,623,000
Dividends paid, ordinary shares per share \| $ / shares					$ 3.18571574
Amount of next three interest coupons on bonds without a fixed maturity date						29,993,000
Increase the reserves and other retained profits of the bank						$ 227,295,000
Dividends paid, classified as financing activities												$ 600,336					$ 347,483		$ 485,191
Bonds issued, amount												$ 328,550	$ 20,000	CLF 17,540	SFr 140	¥ 14,000
Additional Pillar II capital requirements bank applied, percentage									50.00%
Sociedad operadora de Tarjetas de Pago Santander Getnet Chile S.A.
Significant Events [Line Items]
Percentage of shares of subsidiary to be sold, that was voted on by the board																				49.99%	49.99%
International Finance Corporation
Significant Events [Line Items]
Commitment to receive loan													$ 100,000
Santander bonds in USD \| 144-A \| Senior bonds
Significant Events [Line Items]
Repayments of borrowings, classified as financing activities								$ 704,132
Santander S.A. Sociedad Securitizadora
Significant Events [Line Items]
Increase in capital to the subsidiary											$ 774
Operadora de Tarjeta de Pago Santander Getnet Chile S.A.
Significant Events [Line Items]
Distribution and payment of dividends, percentage							40.00%
Profits used to increase the banks reserves							60.00%
Dividends recognised as distributions to owners		$ 14,418	$ 23,582		$ 11,730
Dividends paid, ordinary shares per share \| $ / shares					$ 0.58653032
Dividends paid, classified as financing activities	$ 38,000,000
Santander Asset Management S.A. Administradora General de Fondos
Significant Events [Line Items]
Dividends recognised as distributions to owners				$ 7,500
Santander Asset Management S.A. Administradora General de Fondos \| Banco Santander-Chile
Significant Events [Line Items]
Dividends recognised as distributions to owners										$ 2,500