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CONTINGENCIES AND COMMITMENTS (Details) - Contingent Loans [Member] - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of contingent liabilities in business combination [line items]    
Letters of credit issued $ 223,420 $ 201,699
Foreign letters of credit confirmed 57,038 75,499
Performance guarantee 1,954,205 1,823,793
Personal guarantees 133,623 81,577
Total contingent liabilities 2,368,286 2,182,568
Available on demand credit lines 8,997,650 8,135,489
Other irrevocable credit commitments 327,297 260,691
Total loan commit ment 9,324,947 8,396,180
Total $ 11,693,233 $ 10,578,748