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Investments Under Resale Agreements and Obligations Under Repurchase Agreements (Details 1) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending $ 308,734 $ 303,820
Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 298,711 297,162
Over 1 month and up to 3 months    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 8,583 1,448
Over 3 months and up to 12 months [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 1,440 5,210
Instruments Issued By Chilean Government And Central Bank [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 16,368 130,197
Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 16,368 130,197
Other Instruments Issued In Chile [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 292,366 173,623
Other Instruments Issued In Chile [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 282,343 166,965
Other Instruments Issued In Chile [Member] | Over 1 month and up to 3 months    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 1,448
Other Instruments Issued In Chile [Member] | Over 3 months and up to 12 months [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 1,440 5,210
Central Bank bonds | Instruments Issued By Chilean Government And Central Bank [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 7,301 130,197
Central Bank bonds | Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 7,301 130,197
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 289,279 168,825
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 280,696 162,167
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member] | Over 1 month and up to 3 months    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 8,583 1,448
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member] | Over 3 months and up to 12 months [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 5,210
Other Instruments | Other Instruments Issued In Chile [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 3,087 4,798
Other Instruments | Other Instruments Issued In Chile [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 1,647 $ 4,798
Other Instruments | Other Instruments Issued In Chile [Member] | Over 3 months and up to 12 months [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 1,440  
Central Bank promissory notes | Instruments Issued By Chilean Government And Central Bank [Member]    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending 9,067  
Central Bank promissory notes | Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month    
Payables by selling financial instruments and security repurchase commitment [Line Items]    
Payables from repurchase agreements and security lending $ 9,067