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DERIVATIVE FINANCIAL INSTRUMENTS (Exchange rate derivative contract) (Details) $ in Thousands, € in Millions, R$ in Millions, $ in Millions, $ in Billions | Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 COP ($) | Dec. 31, 2018 ARS ($) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2017 USD ($)
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Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value | $ 178,673 |  |  |  |  | $ 338,144
Financial liabilities, at fair value | (12,981) |  |  |  |  | (6,001)
Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial liabilities, at fair value | (12,211) |  |  |  |  | (3,999)
Long | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Notional amount |  | € 212.9 |  | $ 6,400.0 | R$ 34.5 |
Long | Euro Member Countries, Euro | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value |  |  |  |  |  | 224
Financial liabilities, at fair value | (12,954) |  |  |  |  |
Long | Brazil, Brazil Real | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value |  |  |  |  |  | 1,514
Financial liabilities, at fair value | (493) |  |  |  |  |
Long | Argentina, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value | 0 |  |  |  |  |
Financial liabilities, at fair value |  |  |  |  |  | (6,534)
Short | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Notional amount |  | € 1.9 | $ 194.9 | $ 187.0 | R$ 32.0 |
Short | Euro Member Countries, Euro | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value |  |  |  |  |  | 0
Financial liabilities, at fair value | (27) |  |  |  |  |
Short | Brazil, Brazil Real | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value | 1,154 |  |  |  |  | 247
Short | Colombia, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value | 109 |  |  |  |  | 17
Short | Argentina, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Financial assets, at fair value | $ 0 |  |  |  |  | $ 533

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