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Risk Management (Details) - Schedule of Net Stable Funding Ratio | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Schedule of Net Stable Funding Ratio [Abstract] |  |
NSFR | 106.00% | 116.00%

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- Definition The percentage of net stable funding ratio is a liquidity standard requiring banks to hold enough stable funding to cover the duration of their long-term assets. + References No definition available. + Details
Name: | bsac_NetStableFundingRatio
Namespace Prefix: | bsac_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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