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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