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INTEREST INCOME (Details 1) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | $ (809,956) | $ (719,850) | $ (799,636)
Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (629,467) | (617,200) | (644,540)
Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (180,489) | (102,650) | (155,096)
Demand Deposits [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (16,285) | (14,546) | (17,046)
Demand Deposits [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (14,914) | (13,851) | (16,003)
Demand Deposits [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (1,371) | (695) | (1,043)
Repurchase Agreements [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (6,439) | (6,514) | (2,822)
Repurchase Agreements [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (6,439) | (6,514) | (2,822)
Repurchase Agreements [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting |  |  |
Time Deposits And Liabilities [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (352,345) | (362,330) | (438,666)
Time Deposits And Liabilities [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (317,061) | (341,821) | (399,720)
Time Deposits And Liabilities [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (35,284) | (20,509) | (38,946)
Interbank Loan [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (39,971) | (26,805) | (19,803)
Interbank Loan [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (39,971) | (26,805) | (19,803)
Interbank Loan [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting |  |  |
Issued Debt Instruments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (374,682) | (296,197) | (303,425)
Issued Debt Instruments [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (241,455) | (220,027) | (197,973)
Issued Debt Instruments [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (133,227) | (76,170) | (105,452)
Other financial liabilities [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (2,808) | (3,249) | (3,789)
Other financial liabilities [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (2,698) | (2,946) | (3,008)
Other financial liabilities [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (110) | (303) | (781)
Other Interest Expense [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (17,426) | (10,209) | (14,085)
Other Interest Expense [Member] | Hedged Of Interest [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | (6,929) | (5,236) | (5,211)
Other Interest Expense [Member] | Hedged Of Inflation Adjustments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Interest expense not including expenses from hedge accounting | $ (10,497) | $ (4,973) | $ (8,874)

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