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Transactions With Related Parties (Details) - Schedule of Loan Activity to Related Parties - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Group entities [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of Loan Activity to Related Parties [Line Items] |  |  |  |  |  |
Opening balances | [1] | $ 730,208 | $ 607,378 |  | $ 356,848 |
Total |  | 752,817 | 730,208 | [1] | 607,378 | [1]
Loans granted |  | 101,819 | 179,540 | [1] | 373,006 | [1]
Loans payments |  | (79,210) | (56,710) | [1] | (122,476) | [1]
Associated Companies [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of Loan Activity to Related Parties [Line Items] |  |  |  |  |  |
Opening balances |  | 118 | 192 |  | 265 |
Total |  | 49,284 | 118 |  | 192 |
Loans granted |  | 65,320 | 29 |  |  |
Loans payments |  | (16,154) | (103) |  | (73) |
Key Personnel [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of Loan Activity to Related Parties [Line Items] |  |  |  |  |  |
Opening balances |  | 40,204 | 29,889 |  | 32,498 |
Total |  | 39,469 | 40,204 |  | 29,889 |
Loans granted |  | 13,177 | 18,115 |  | 5,738 |
Loans payments |  | (13,912) | (7,800) |  | (8,347) |
Other [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of Loan Activity to Related Parties [Line Items] |  |  |  |  |  |
Opening balances |  | 280 | 219 |  | 993 |
Total |  | 1,321 | 280 |  | 219 |
Loans granted |  | 5,389 | 156 |  | 53 |
Loans payments |  | $ (4,348) | $ (95) |  | $ (827) |
[1] | Loans with non-controlled companies (not-consolidated) amount MCh$3,348, MCh$27,544 and MCh$1,174 as of December 31, 2023, 2022 and 2021, respectively.

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- Definition Amount of loan activity as of balance sheet date. + References No definition available. + Details
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Balance Type: | debit
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- Definition Amount of loan granted to related party during the period. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of loan payment from related party during the period. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:stringItemType
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- Details
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- Details
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- Details
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- Details
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