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Subsequent Events - Schedule of Local Market, the Bank has Placed Bonds (Details)
 12 Months Ended
Dec. 31, 2024
CLP ($)
Jan. 10, 2025
CLP ($)
Dec. 31, 2024
CLF
Dec. 31, 2023
CLP ($)
Dec. 31, 2023
CLF
Subsequent Events (Details) - Schedule of Local Market, the Bank has Placed Bonds [Line Items]          
Amount $ 220,811,161,000,000     $ 272,064,708,000,000  
Senior bonds | Santander bonds in UF          
Subsequent Events (Details) - Schedule of Local Market, the Bank has Placed Bonds [Line Items]          
Amount | CLF     CLF 21,302,000   CLF 7,719,000
AA18 | Senior bonds | Santander bonds in UF          
Subsequent Events (Details) - Schedule of Local Market, the Bank has Placed Bonds [Line Items]          
Rate 3.30%        
Amount   $ 1,300,000,000,000