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Other Assets (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 30, 2020 | Dec. 31, 2022 | Oct. 31, 2020
Disclosure of Other Assets Text Block (Abstract) |  |  |
Financing proposal amount | $ 2,200 |  |
Disbursement of financing amount |  |  | $ 1,150
Disbursement percentage |  |  | 50.00%
Capital convertible bonds debt amount |  | $ 8,190 |

X
- Definition Amount of capital convertible bonds debt. + References No definition available. + Details
Name: | bsac_CapitalConvertibleBondsDebtAmount
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Disbursement of financing amount. + References No definition available. + Details
Name: | bsac_DisbursementOfFinancingAmount
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disbursement percentage. + References No definition available. + Details
Name: | bsac_DisbursementPercentage
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | bsac_DisclosureOfOtherAssetsTextBlockAbstract
Namespace Prefix: | bsac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Relating to Financing proposal amount. + References No definition available. + Details
Name: | bsac_FinancingProposalAmount
Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration