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DEBT INSTRUMENTS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME (Details Narrative) - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]    
Available for sale investments   $ 2,574,546
Other comprehensive income, net of tax, available-for-sale financial assets $ 6,424 1,855
Bank maintains guarantees amount 98,832 33,711
Total Attributable To Shareholders Of The Bank [Member]    
Disclosure of financial assets [line items]    
Other comprehensive income, net of tax, available-for-sale financial assets 5,114 459
Non-controlling Interest [Member]    
Disclosure of financial assets [line items]    
Other comprehensive income, net of tax, available-for-sale financial assets 1,310 1,396
Other Chilean Securities [Member]    
Disclosure of financial assets [line items]    
Available for sale investments 27,673
Foreign Financial Securities [Member]    
Disclosure of financial assets [line items]    
Available for sale investments 284,072
Securities Sold Under Repurchase Agreements [Member] | Other Chilean Securities [Member]    
Disclosure of financial assets [line items]    
Available for sale investments   1,156
Securities Sold Under Repurchase Agreements [Member] | Foreign Financial Securities [Member]    
Disclosure of financial assets [line items]    
Available for sale investments   24,910
Chilean Central Bank And Government Securities [Member]    
Disclosure of financial assets [line items]    
Available for sale investments 2,262,801
Chilean Central Bank And Government Securities [Member] | Securities Sold Under Repurchase Agreements [Member]    
Disclosure of financial assets [line items]    
Available for sale investments   241,995
Comder Contraparte Central S.A. [Member]    
Disclosure of financial assets [line items]    
Available for sale investments 48,081 42,910
London Clearing House (LCH) [Member]    
Disclosure of financial assets [line items]    
Available for sale investments $ 58,892 $ 48,106