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ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES (Details 3) € in Millions, ¥ in Millions, SFr in Millions, $ in Millions, $ in Millions, $ in Millions, in Millions | Dec. 31, 2018 CLP ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 JPY (¥) | Dec. 31, 2018 CLF ( ) | Dec. 31, 2018 CHF (SFr) | Dec. 31, 2018 AUD ($) | Dec. 31, 2017 CLP ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 JPY (¥) | Dec. 31, 2017 CLF ( ) | Dec. 31, 2017 CHF (SFr) | Dec. 31, 2017 AUD ($)
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Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | $ 8,115,233 |  |  |  |  |  |  | $ 7,093,653 |  |  |  |  |  |
Senior Bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | 7,198,865 |  |  |  |  |  |  | 6,186,760 |  |  |  |  |  |
Senior Bonds [Member] | Unidad De Fomento (funds code) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | |  |  |  |  | 4,095,741 |  |  |  |  |  |  | 3,542,006 |  |
Senior Bonds [Member] | USD [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments |  | $ 1,094,267 |  |  |  |  |  |  | $ 1,045,465 |  |  |  |  |
Senior Bonds [Member] | Switzerland, Francs |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | SFr |  |  |  |  |  | SFr 386,979 |  |  |  |  |  |  | SFr 268,281 |
Senior Bonds [Member] | Chile, Pesos |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | $ 1,291,900 |  |  |  |  |  |  | $ 1,135,527 |  |  |  |  |  |
Senior Bonds [Member] | AUD |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments |  |  |  |  |  |  | $ 24,954 |  |  |  |  |  |  | $ 14,534
Senior Bonds [Member] | JPY [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | ¥ |  |  |  | ¥ 191,598 |  |  |  |  |  |  | ¥ 126,059 |  |  |
Senior Bonds [Member] | EUR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of financial liabilities [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued debt instruments | € |  |  | € 113,426 |  |  |  |  |  |  | € 54,888 |  |  |  |

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