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Transactions With Related Parties (Details) - Schedule of Business Operations of the Bank With their Clients
$ in Millions
 12 Months Ended
Dec. 31, 2024
CLP ($)
Dec. 31, 2023
CLP ($)
Dec. 31, 2024
CLF
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CLP ($)
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Exceed amount     CLF 2,000 $ 77,289  
Expenses MCh$ $ 33,385 $ 10,972      
Banco Santander, S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 21,898 18,929      
Account receivable 0 0      
Account payable MCh$   18,715     $ 1,264
Santander Back-Offices Globales Mayoristas, S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 3,554 3,216      
Account receivable 0 0      
Account payable MCh$   0     0
Santander Chile Holding S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 266 255      
Expenses MCh$ 0 0      
Account receivable 1 2      
Account payable MCh$   0     0
Santander Factoring S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 44 42      
Expenses MCh$ 412 418      
Account receivable 20 20      
Account payable MCh$   51     103
Bansa Santander S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 4        
Expenses MCh$ 83        
Account receivable 0        
Account payable MCh$         0
Gesban Santander Servicios Profesionales Contables Limitada          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 57 60      
Expenses MCh$ 762 1,104      
Account receivable 0 0      
Account payable MCh$   0     0
Santander Global Services, S.L. Unipersonal          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0        
Expenses MCh$ 643        
Account receivable 0        
Account payable MCh$         0
Santander Global Services, S.L.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$   0      
Expenses MCh$   639      
Account receivable   0      
Account payable MCh$   0      
Santander Investment Chile Limitada          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 4,925 4,725      
Account receivable 3 0      
Account payable MCh$   29     310
Santander Global Technology and Operations Chile limitada          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 372 306      
Account receivable 0 0      
Account payable MCh$   9     14
Universia Chile S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 7 4      
Expenses MCh$ 435 377      
Account receivable 0 0      
Account payable MCh$   0     84
Aquanima Chile S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 1,904 1,943      
Account receivable 0 0      
Account payable MCh$   112     351
Santander Asset Management S.A. Administradora General de Fondos          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 483 676      
Account receivable 9,335 747      
Account payable MCh$   78     81
Centro de Compensación Automatizado S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 3,501 3,615      
Account receivable 0 0      
Account payable MCh$   0     0
Sociedad Operadora de la Cámara de Compensación de Pagos de Alto Valor S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 733 646      
Account receivable 0 0      
Account payable MCh$   0     0
Zurich Santander Seguros Generales Chile S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 187 205      
Expenses MCh$ 0 0      
Account receivable 1,883 1,667      
Account payable MCh$   0     0
F1rst Tecnologia e Inovação Ltda.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 26,816 8,723      
Account receivable 0 0      
Account payable MCh$   0     0
Santander Global Technology and Operations, S.L. Unipersonal          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 57,379 52,948      
Account receivable 132 0      
Account payable MCh$   0     0
PagoNxt Trade Services, S.L.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0 0      
Expenses MCh$ 620 400      
Account receivable 0 0      
Account payable MCh$   0     0
Mercury Trade Finance Solutions, S.p.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$   0      
Expenses MCh$   183      
Account receivable   0      
Account payable MCh$   0      
Klare Corredora de Seguros S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 78        
Expenses MCh$ 0        
Account receivable 267        
Account payable MCh$         0
Universia Holding, S.L.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0        
Expenses MCh$ 77        
Account receivable 0        
Account payable MCh$         0
Santander Global Cards & Digital Solutions, S.L.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$ 0        
Expenses MCh$ 515        
Account receivable $ 0        
Account payable MCh$         $ 0
Banco Santander, S.A.          
Schedule of Business Operations of the Bank With their Clients [Line Items]          
Income MCh$   0      
Expenses MCh$   18,929      
Account receivable   0      
Account payable MCh$   $ 18,715