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Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2020
CLP ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CLP ($)
Dec. 31, 2018
CLP ($)
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions $ (226,043)   $ (20,611) $ (2,608)
Group provisions (367,474)   (362,619) (310,492)
Provisions established net (593,517)   (383,230) (313,100)
Individual provisions 4,652   3,654 2,423
Group provisions       327
Provisions released net 4,652   3,654 2,750
Recovery of written-off assets 41,759   47,975 60,579
Provisions net allowances for credit risk (547,106) $ (768,515) (331,601) (249,771)
Loans and advance to banks [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions (348)     (240)
Provisions established net (348)     (240)
Individual provisions     902  
Provisions released net     902  
Provisions net allowances for credit risk (348)   902 (240)
Contingent loan risks [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions (18,084)     (2,368)
Group provisions (55,126)   (2,707)  
Provisions established net (73,210)   (2,707) (2,368)
Individual provisions     2,752  
Group provisions       327
Provisions released net     2,752 327
Provisions net allowances for credit risk (73,210)   45 (2,041)
Commercial loans [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions (207,611)   (17,143)  
Group provisions (88,278)   (64,492) (61,702)
Provisions established net (295,889)   (81,635) (61,702)
Individual provisions       871
Provisions released net       871
Recovery of written-off assets 8,599   12,253 13,579
Provisions net allowances for credit risk (287,290)   (69,382) (47,252)
Mortgage loans [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Group provisions (4,607)   (17,168) (7,546)
Provisions established net (4,607)   (17,168) (7,546)
Recovery of written-off assets 3,377   5,114 4,572
Provisions net allowances for credit risk (1,230)   (12,054) (2,974)
Consumer loans [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Group provisions (219,463)   (278,252) (241,244)
Provisions established net (219,463)   (278,252) (241,244)
Recovery of written-off assets 29,783   30,608 42,428
Provisions net allowances for credit risk (189,680)   (247,644) (198,816)
Subtotal [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions (207,611)   (17,143)  
Group provisions (312,348)   (359,912) (310,492)
Provisions established net (519,959)   (377,055) (310,492)
Individual provisions       871
Provisions released net       871
Recovery of written-off assets 41,759   47,975 60,579
Provisions net allowances for credit risk (478,200)   (329,080) (249,042)
Debt instruments at fair value through OCI [member]        
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items]        
Individual provisions     (3,468)  
Provisions established net     (3,468)  
Individual provisions 4,652     1,552
Provisions released net 4,652     1,552
Provisions net allowances for credit risk $ 4,652   $ (3,468) $ 1,552