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Financial Assets at Amortised Cost - Narrative (Details) - CLP ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 27, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Net income from non-current assets and groups available for sale not admissible as discontinued operations |  | $ (37,068) | $ (120,934) | $ (1,628)
Increase (decrease) in financial assets |  | 162,997 | 121,749 |
Loan from mortgage |  | 89,994 | 93,614 |
Credit loss allowance (in Pesos) |  | 89,994 | 93,614 |
Commercial loans |  |  |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Net income from non-current assets and groups available for sale not admissible as discontinued operations |  | 172,403 |  |
Mortgage loans |  |  |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Net income from non-current assets and groups available for sale not admissible as discontinued operations |  | 79,626 |  |
Leasing Loans |  |  |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Net income from non-current assets and groups available for sale not admissible as discontinued operations |  | 17,883 |  |
Santander Consumer Finance Limitada | Automotive Loans |  |  |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Net income from non-current assets and groups available for sale not admissible as discontinued operations | $ 22,936 |  |  |
Sale of loan portfolio, percentage | 2.00% |  |  |
Expected credit loss allowance |  |  |  |
Financial Assets at Amortised Cost (Details) [Line Items] |  |  |  |
Increase (decrease) in financial assets |  | $ (353) | $ 73,000 |

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