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INTERBANK BORROWINGS (Details) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]    
Interbank borrowings $ 1,788,626 $ 1,698,357
Loans From Financial Institutions And The Central Bank Of Chile [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 5
Loans From Financial Institutions And The Central Bank Of Chile [Member] | Borrowings And Other Obligations [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 5
Loans From Domestic Financial Institutions [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 480
Loans From Foreign Financial Institutions [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,787,943 1,554,071
Loans From Foreign Financial Institutions [Member] | Bank Of America N.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 338,906 228,309
Loans From Foreign Financial Institutions [Member] | Sumitomo Mitsui Banking Corporation [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 278,761 259,199
Loans From Foreign Financial Institutions [Member] | Citibank N.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 241,041 191,494
Loans From Foreign Financial Institutions [Member] | Mizuho Bank Ltd. NY. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 223,829 215,967
Loans From Foreign Financial Institutions [Member] | Wells Fargo Bank N.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 216,749 235,058
Loans From Foreign Financial Institutions [Member] | The Bank of Nova Scotia [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 163,927 86,419
Loans From Foreign Financial Institutions [Member] | The Bank of New York Mellon [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 69,921 30,839
Loans From Foreign Financial Institutions [Member] | Corporacion Andina De Fomento [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 52,371
Loans From Foreign Financial Institutions [Member] | Standard Chartered Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 50,960 225,966
Loans From Foreign Financial Institutions [Member] | Barclays Bank PLC London [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 34,965 30,886
Loans From Foreign Financial Institutions [Member] | HSBC Bank Plc NY [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 34,936 30,875
Loans From Foreign Financial Institutions [Member] | Wachovia Bank, NA [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33,499
Loans From Foreign Financial Institutions [Member] | Banco Santander Brasil S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 8,040 5,225
Loans From Foreign Financial Institutions [Member] | Bank of China [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 7,777 831
Loans From Foreign Financial Institutions [Member] | Banco Santander - Hong Kong [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 6,047 8,341
Loans From Foreign Financial Institutions [Member] | Deutsche Bank A.G. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 5,558 157
Loans From Foreign Financial Institutions [Member] | Bnp Paribas, Hong Kong Branch [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 3,554
Loans From Foreign Financial Institutions [Member] | Keb Hana Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 2,318 396
Loans From Foreign Financial Institutions [Member] | Rabobank, Hong Kong Branch [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,548
Loans From Foreign Financial Institutions [Member] | Hong Kong and Shanghai Banking [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,300 222
Loans From Foreign Financial Institutions [Member] | Banco Santander Central Hispano [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,295 312
Loans From Foreign Financial Institutions [Member] | Unicredito Italiano [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,117 264
Loans From Foreign Financial Institutions [Member] | Bank of Tokyo Mitsubishi [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,032 453
Loans From Foreign Financial Institutions [Member] | Banco Bilbao Vizcaya Argentaria [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 888
Loans From Foreign Financial Institutions [Member] | Standard Chartered Bank Malays [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 843
Loans From Foreign Financial Institutions [Member] | Dexia Bank SA [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 789
Loans From Foreign Financial Institutions [Member] | Banque Bruxelles Lambert S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 509
Loans From Foreign Financial Institutions [Member] | Hsbc Bank Usa [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 394 38
Loans From Foreign Financial Institutions [Member] | Shinhan Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 380 394
Loans From Foreign Financial Institutions [Member] | United Bank of India [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 378
Loans From Foreign Financial Institutions [Member] | Woori Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 356 105
Loans From Foreign Financial Institutions [Member] | State Bank of India [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 331 110
Loans From Foreign Financial Institutions [Member] | Banca Commerciale Italiana S.P. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 288 31
Loans From Foreign Financial Institutions [Member] | Shanghai Pudong Development [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 237
Loans From Foreign Financial Institutions [Member] | Banco de Galicia Y Buenos Aires [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 231
Loans From Foreign Financial Institutions [Member] | Bank of East Asia, Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 205 241
Loans From Foreign Financial Institutions [Member] | First Union National Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 201 35
Loans From Foreign Financial Institutions [Member] | Industrial Bank of Korea [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 195
Loans From Foreign Financial Institutions [Member] | Canara Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 237 224
Loans From Foreign Financial Institutions [Member] | Banca Monte dei Paschi di Siena [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 179 162
Loans From Foreign Financial Institutions [Member] | Metropolitan Bank Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 170 87
Loans From Foreign Financial Institutions [Member] | Hua Nan Commercial Bank Ltd. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 164 349
Loans From Foreign Financial Institutions [Member] | Credit Lyonnais [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 139
Loans From Foreign Financial Institutions [Member] | Bank of Shanghai [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 134
Loans From Foreign Financial Institutions [Member] | Bank of Taiwan [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 127 136
Loans From Foreign Financial Institutions [Member] | Agricultural Bank of China [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 106 295
Loans From Foreign Financial Institutions [Member] | Akbank T,A,S, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 106
Loans From Foreign Financial Institutions [Member] | Credit Agricole [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 106
Loans From Foreign Financial Institutions [Member] | Banco Bradesco S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 89
Loans From Foreign Financial Institutions [Member] | Oriental Bank of Commerce [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 87
Loans From Foreign Financial Institutions [Member] | Kookmin Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 78 201
Loans From Foreign Financial Institutions [Member] | Banca Nazionale Del Lavoro S,P [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 77
Loans From Foreign Financial Institutions [Member] | Hsbc Bank Middle East [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 77
Loans From Foreign Financial Institutions [Member] | International Commercial Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 70 221
Loans From Foreign Financial Institutions [Member] | Taiwan Cooperative Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 66 159
Loans From Foreign Financial Institutions [Member] | Banca Lombarda E Piemontese S. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 60
Loans From Foreign Financial Institutions [Member] | Hanvit Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 58 55
Loans From Foreign Financial Institutions [Member] | Bank of India [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 51
Loans From Foreign Financial Institutions [Member] | Caixabank S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 44
Loans From Foreign Financial Institutions [Member] | Fortis Bank S.A./N.V. Brussels [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 42 15
Loans From Foreign Financial Institutions [Member] | Banco de la Republica Oriental [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 41
Loans From Foreign Financial Institutions [Member] | Bank of Baroda [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 37
Loans From Foreign Financial Institutions [Member] | China Construccion Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 35 90
Loans From Foreign Financial Institutions [Member] | Banco Internacional S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33
Loans From Foreign Financial Institutions [Member] | Joint Stock Commercial Bank Fo, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33
Loans From Foreign Financial Institutions [Member] | Shanghai Commercial and Saving [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33
Loans From Foreign Financial Institutions [Member] | Banistmo S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 32
Loans From Foreign Financial Institutions [Member] | Banca Popolare Dell'Emilia Rom [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 31 53
Loans From Foreign Financial Institutions [Member] | Bank of Montreal [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 31 30
Loans From Foreign Financial Institutions [Member] | Raiffeisen Bank Polska S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 31
Loans From Foreign Financial Institutions [Member] | Casa Di Risparmo De Padova E.R. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 30 56
Loans From Foreign Financial Institutions [Member] | Industrial And Commercial Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 30 119
Loans From Foreign Financial Institutions [Member] | Hdfc Bank Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 28
Loans From Foreign Financial Institutions [Member] | Bankinter S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 24
Loans From Foreign Financial Institutions [Member] | Kbc Bank Nv [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 23
Loans From Foreign Financial Institutions [Member] | Banco Bpm SPA [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 21
Loans From Foreign Financial Institutions [Member] | Cassa Di Risparmio In Bologna [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 21
Loans From Foreign Financial Institutions [Member] | Banco De Sabadell S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 20
Loans From Foreign Financial Institutions [Member] | Banco Commerzbank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 19
Loans From Foreign Financial Institutions [Member] | Taiwan Business Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 19 19
Loans From Foreign Financial Institutions [Member] | Cajas Rurales Unidas [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 18
Loans From Foreign Financial Institutions [Member] | Chang Hwa Commercial Bank Ltd. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 18 14
Loans From Foreign Financial Institutions [Member] | U,S. Bank Formerly First Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 18
Loans From Foreign Financial Institutions [Member] | United World Chinese Commercia [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 15
Loans From Foreign Financial Institutions [Member] | Banco Itau S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 14
Loans From Foreign Financial Institutions [Member] | Mega International Commercial [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 9
Loans From Foreign Financial Institutions [Member] | Banca Popolare Di Milano S,C,A [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 6
Loans From Foreign Financial Institutions [Member] | Hang Seng Bank (China) Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 6
Loans From Foreign Financial Institutions [Member] | Sumitono Mitsui [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 4
Loans From Foreign Financial Institutions [Member] | Development Bank Of Singapore [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 3
Loans From Foreign Financial Institutions [Member] | Abanca Corporacion Bancaria SA [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 60
Loans From Foreign Financial Institutions [Member] | Australia And New Zealand Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 62
Loans From Foreign Financial Institutions [Member] | Banca Delle Marche Spa [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 76
Loans From Foreign Financial Institutions [Member] | Banco Bradesco S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 50
Loans From Foreign Financial Institutions [Member] | Banco Caixa Geral. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33
Loans From Foreign Financial Institutions [Member] | Banco Commerzbank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 145
Loans From Foreign Financial Institutions [Member] | Banco de occidente [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 282
Loans From Foreign Financial Institutions [Member] | Banco De Sabadell S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 10
Loans From Foreign Financial Institutions [Member] | Banco Do Brasil S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 268
Loans From Foreign Financial Institutions [Member] | Banco Internacional S,A, [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 33
Loans From Foreign Financial Institutions [Member] | Banco Popolare Soc Coop [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 6
Loans From Foreign Financial Institutions [Member] | Banco Popular Espanol S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 19
Loans From Foreign Financial Institutions [Member] | Bancolombia S.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 94
Loans From Foreign Financial Institutions [Member] | Bank Austria A.G. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 2,317
Loans From Foreign Financial Institutions [Member] | Bank of Communications [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 93
Loans From Foreign Financial Institutions [Member] | Bank Of Nova Scotia [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 112
Loans From Foreign Financial Institutions [Member] | Banque Generale Du Luxembourg [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 207
Loans From Foreign Financial Institutions [Member] | Cassa Di Risparmio Di Parma E [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 93
Loans From Foreign Financial Institutions [Member] | Citic Industrial Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 39
Loans From Foreign Financial Institutions [Member] | Corporacion Andina De Fomento [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 31,075
Loans From Foreign Financial Institutions [Member] | European Investment Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 12,629
Loans From Foreign Financial Institutions [Member] | Habib Bank Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 34
Loans From Foreign Financial Institutions [Member] | Hang Seng Bank Ltd. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 39
Loans From Foreign Financial Institutions [Member] | Hsbc Bank Plc [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 30,838
Loans From Foreign Financial Institutions [Member] | Icici Bank Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 8
Loans From Foreign Financial Institutions [Member] | J.P. Morgan Chase Bank N.A. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 154
Loans From Foreign Financial Institutions [Member] | Kasikornbank Public Company Li. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 25
Loans From Foreign Financial Institutions [Member] | Liu Chong Hing Bank Limited [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 21
Loans From Foreign Financial Institutions [Member] | Mizuho Corporate Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 331
Loans From Foreign Financial Institutions [Member] | Punjab National Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 47
Loans From Foreign Financial Institutions [Member] | Shanghai Pudong Development [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 714
Loans From Foreign Financial Institutions [Member] | Societe Generale [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 56
Loans From Foreign Financial Institutions [Member] | Thai Military Bank Public Comp [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 377
Loans From Foreign Financial Institutions [Member] | The Toronto-Dominion Bank [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 62,743
Loans From Foreign Financial Institutions [Member] | Yapi Ve Kredi Bankasi A.S. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 155
Loans From Foreign Financial Institutions [Member] | Zhejiang Commercial Bank Ltd. [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 175
Loans from foreign financial institutions, continuacion [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings 1,788,626 1,698,357
Loans from foreign financial institutions, continuacion [Member] | Subtotal [Member]    
Disclosure of financial liabilities [line items]    
Interbank borrowings $ 683 $ 143,801