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Financial Assets at Fair Value through Other Comprehensive Income (Details Textual) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]      
Assets $ 1,366,343 $ 1,053,191  
Assets instruments Available-for Sale      
Disclosure of financial assets [line items]      
Net unrealized gain recorded in other comprehensive income for available for sale securities     $ 9,521
Assets instruments Available-for Sale | Other Instruments Sold Under Repurchase Agreements | Instruments Issued By Chilean Government And Central Bank [Member]      
Disclosure of financial assets [line items]      
Assets   $ 5,177  
Repurchase agreement expiration period   3 days  
Debt Instruments Valued At Fair Value      
Disclosure of financial assets [line items]      
Assets 1,357,846 $ 1,043,440  
Net unrealized gain recorded in other comprehensive income for available for sale securities 15,290 3,649  
Impairment of financial assets 7,736 4,268  
Debt Instruments Valued At Fair Value | Fair Value      
Disclosure of financial assets [line items]      
Net unrealized gain recorded in other comprehensive income for available for sale securities    
Impairment of financial assets    
Debt Instruments Valued At Fair Value | Other Instruments Sold Under Repurchase Agreements | Instruments Issued By Chilean Government And Central Bank [Member]      
Disclosure of financial assets [line items]      
Assets $ 6,965  
Repurchase agreement expiration period 0 days 3 days  
Financial Assets Availableforsale Category      
Disclosure of financial assets [line items]      
Realized gains reclassified to the income statement $ 4,716 $ 400 $ 5,149