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Right of Use Assets and Obligation for Lease Contracts (Details) - Schedule of Accumulated Amortization - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Schedule of Accumulated Amortization [Line Items] |  |
Balances as of beginning | $ (114,962) | $ (97,808)
Amortisation for the period | (27,812) | (31,314)
Sales and disposals during the period | 14,520 | 14,160
Transfers | (188) | 0
Others | 0 | 0
Balances as of ending | (128,442) | (114,962)
Land and building |  |
Schedule of Accumulated Amortization [Line Items] |  |
Balances as of beginning | (114,962) | (97,808)
Amortisation for the period | (27,812) | (31,314)
Sales and disposals during the period | 14,520 | 14,160
Transfers | (188) | 0
Others | 0 | 0
Balances as of ending | (128,442) | (114,962)
Others |  |
Schedule of Accumulated Amortization [Line Items] |  |
Balances as of beginning | 0 | 0
Amortisation for the period | 0 | 0
Sales and disposals during the period | 0 | 0
Transfers | 0 | 0
Others | 0 | 0
Balances as of ending | $ 0 | $ 0

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- Definition Amortization For The Period + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of other accumulated amortization. + References No definition available. + Details
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Namespace Prefix: | bsac_
Data Type: | xbrli:monetaryItemType
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- Definition Right of use assets accumulated depreciation. + References No definition available. + Details
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- Definition Schedule of Accumulated Amortization [Line Items] + References No definition available. + Details
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- Definition The amount of sales and disposals. + References No definition available. + Details
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Namespace Prefix: | bsac_
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Balance Type: | debit
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- Definition Transfers + References No definition available. + Details
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Namespace Prefix: | bsac_
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Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |