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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Companies Of The Group [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of loan activity to related parties [Line Items] |  |  |  |  |  |
Opening balances | [1] | $ 607,378 | $ 356,848 |  | $ 715,671 |
Total |  | 730,208 | 607,378 | [1] | 356,848 | [1]
Loans granted |  | 179,540 | 373,006 | [1] | 388,896 | [1]
Loans payments |  | (56,710) | (122,476) | [1] | (747,719) | [1]
Associated Companies [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of loan activity to related parties [Line Items] |  |  |  |  |  |
Opening balances |  | 192 | 265 |  | 375 |
Total |  | 118 | 192 |  | 265 |
Loans granted |  | 29 |  |  |  |
Loans payments |  | (103) | (73) |  | (110) |
Key Personnel [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of loan activity to related parties [Line Items] |  |  |  |  |  |
Opening balances |  | 29,889 | 32,498 |  | 29,240 |
Total |  | 40,204 | 29,889 |  | 32,498 |
Loans granted |  | 18,115 | 5,738 |  | 8,080 |
Loans payments |  | (7,800) | (8,347) |  | (4,822) |
Other [Member] |  |  |  |  |  |
Transactions With Related Parties (Details) - Schedule of loan activity to related parties [Line Items] |  |  |  |  |  |
Opening balances |  | 219 | 993 |  | 748 |
Total |  | 280 | 219 |  | 993 |
Loans granted |  | 156 | 53 |  | 727 |
Loans payments |  | $ (95) | $ (827) |  | $ (482) |
[1] | Loans with non-controlled companies (not-consolidated) amount MCh$27,544, MCh$1,174 and MCh$2,286 as of December 31, 2022, 2021 and 2020, respectively.

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- Definition Amount of loan activity as of balance sheet date. + References No definition available. + Details
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- Definition Amount of loan granted to related party during the period. + References No definition available. + Details
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Balance Type: | debit
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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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- Details
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- Details
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- Details
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- Details
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