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Intangible Assets - Individual Business Segments (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
CLP ($)
Segment
Dec. 31, 2018
CLP ($)
Segment
Disclosure of detailed information about intangible assets [line items]    
Number of business segments | Segment 4 4
Goodwill   $ 85,471
Individual Business Segments    
Disclosure of detailed information about intangible assets [line items]    
Goodwill $ 16,714 16,714
Individual Business Segments | Retail    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 5,928 5,928
Individual Business Segments | Wholesale    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 2,135 2,135
Individual Business Segments | Treasury and money market operations    
Disclosure of detailed information about intangible assets [line items]    
Goodwill 4,513 4,513
Individual Business Segments | Subsidiaries    
Disclosure of detailed information about intangible assets [line items]    
Goodwill $ 4,138 $ 4,138