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Financial Assets at Fair Value through Other Comprehensive Income (Details) - CLP ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Debt Instruments Valued At Fair Value [Member]      
Financial Assets at Fair Value through Other Comprehensive Income (Details) [Line Items]      
Net unrealized gain recorded in other comprehensive income for available for sale securities $ 9,054 $ 15,290  
Impairment of financial assets 3,084 7,736  
Debt Instruments Valued At Fair Value [Member] | Instruments issued by the Chilean Governments and Central Bank of Chile [Member] | Other Instruments Sold Under Repurchase Agreements [Member]      
Financial Assets at Fair Value through Other Comprehensive Income (Details) [Line Items]      
Assets $ 13,268    
Repurchase agreement expiration period 5 days    
Financial Assets Availableforsale Category [Member]      
Financial Assets at Fair Value through Other Comprehensive Income (Details) [Line Items]      
Realized gains reclassified to the income statement $ 22,735 $ 4,716 $ 400