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FINANCIAL INSTRUMENTS (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of derivative financial instruments [text block] [Abstract] |
Disclosure of financial instruments at fair value through profit or loss [text block] |
Assets |  | Measured at amortized cost |  |  | At fair value with changes in results |  |  | Hedge derivatives |  |  | Total |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Cash and cash equivalents |  |  | 850,485 |  |  |  | 222,094 |  |  |  | - |  |  |  | 1,072,579 |
Other financial assets, current (*) |  |  | 36,660 |  |  |  | 386,669 |  |  |  | 76,175 |  |  |  | 499,504 |
Trade and others accounts receivable, current |  |  | 1,244,348 |  |  |  | - |  |  |  | - |  |  |  | 1,244,348 |
Accounts receivable from related entities, current |  |  | 19,645 |  |  |  | - |  |  |  | - |  |  |  | 19,645 |
Other financial assets, non current |  |  | 46,907 |  |  |  | - |  |  |  | - |  |  |  | 46,907 |
Accounts receivable, non current |  |  | 4,725 |  |  |  | - |  |  |  | - |  |  |  | 4,725 |
Total |  |  | 2,202,770 |  |  |  | 608,763 |  |  |  | 76,175 |  |  |  | 2,887,708 |
|  | Measured at amortized |  |  | Hedge |  |  |  |
Liabilities |  | cost |  |  | derivatives |  |  | Total |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Other financial liabilities, current |  |  | 1,835,288 |  |  |  | 50,372 |  |  |  | 1,885,660 |
Trade and others accounts payable, current |  |  | 2,222,874 |  |  |  | - |  |  |  | 2,222,874 |
Accounts payable to related entities, current |  |  | 56 |  |  |  | - |  |  |  | 56 |
Other financial liabilities, non-current |  |  | 8,530,396 |  |  |  | 22 |  |  |  | 8,530,418 |
Accounts payable, non-current |  |  | 619,110 |  |  |  | - |  |  |  | 619,110 |
Total |  |  | 13,207,724 |  |  |  | 50,394 |  |  |  | 13,258,118 |
|  | Measured at |  |  | At fair value |  |  |  |  |  |  |
|  | amortized |  |  | with changes |  |  | Hedge |  |  |  |
Assets |  | cost |  |  | in results |  |  | derivatives |  |  | Total |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Cash and cash equivalents |  |  | 1,037,989 |  |  |  | 43,653 |  |  |  | - |  |  |  | 1,081,642 |
Other financial assets, current (*) |  |  | 16,203 |  |  |  | 344,426 |  |  |  | 23,355 |  |  |  | 383,984 |
Trade and others accounts receivable, current |  |  | 1,162,582 |  |  |  | - |  |  |  | - |  |  |  | 1,162,582 |
Accounts receivable from related entities, current |  |  | 2,931 |  |  |  | - |  |  |  | - |  |  |  | 2,931 |
Other financial assets, non current |  |  | 58,700 |  |  |  | - |  |  |  | - |  |  |  | 58,700 |
Accounts receivable, non current |  |  | 5,381 |  |  |  | - |  |  |  | - |  |  |  | 5,381 |
Total |  |  | 2,283,786 |  |  |  | 388,079 |  |  |  | 23,355 |  |  |  | 2,695,220 |
|  | Measured at |  |  | At fair value |  |  |  |  |  |  |
|  | amortized |  |  | with changes |  |  | Hedge |  |  |  |
Liabilities |  | cost |  |  | in results |  |  | derivatives |  |  | Total |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
|  | Restated |  |  | Restated |  |  |  |  |  | Restated |
Other financial liabilities, current (*) |  |  | 1,760,653 |  |  |  | 7,712 |  |  |  | 25,921 |  |  |  | 1,794,286 |
Trade and others accounts payable, current accounts payables, current |  |  | 1,674,303 |  |  |  | - |  |  |  | - |  |  |  | 1,674,303 |
Accounts payable to related entities, current |  |  | 382 |  |  |  | - |  |  |  | - |  |  |  | 382 |
Other financial liabilities, non current |  |  | 8,359,122 |  |  |  | - |  |  |  | 340 |  |  |  | 8,359,462 |
Accounts payable, non-current |  |  | 529,277 |  |  |  | - |  |  |  | - |  |  |  | 529,277 |
Total |  |  | 12,323,737 |  |  |  | 7,712 |  |  |  | 26,261 |  |  |  | 12,357,710 |
| (*) | The value presented as fair value with changes in the result, corresponds mainly to private investment funds, and as measured at amortized cost they correspond to guarantees delivered.
| (*) | The value presented as initial designation as fair value through profit and loss, corresponds mainly to private investment funds; and as measured at amortized cost they correspond to the guarantees granted.
Schedule of financial instruments by currency [Text Block]] |
|  | As of |  |  | As of |
|  | December 31, |  |  | December 31, |
a) Assets |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |
|  |  |  |  | Restated |
Cash and cash equivalents |  |  | 1,072,579 |  |  |  | 1,081,642 |
Argentine peso |  |  | 16,579 |  |  |  | 17,786 |
Brazilian real |  |  | 197,354 |  |  |  | 131,760 |
Chilean peso |  |  | 50,521 |  |  |  | 415,713 |
Colombian peso |  |  | 48,191 |  |  |  | 10,843 |
Euro |  |  | 21,927 |  |  |  | 20,339 |
US Dollar |  |  | 667,785 |  |  |  | 394,215 |
Other currencies |  |  | 70,222 |  |  |  | 90,986 |
Other financial assets (current and non-current) |  |  | 546,411 |  |  |  | 442,684 |
Argentine peso |  |  | 94 |  |  |  | 152 |
Brazilian real |  |  | 417,477 |  |  |  | 327,110 |
Chilean peso |  |  | 26,073 |  |  |  | 25,972 |
Colombian peso |  |  | 522 |  |  |  | 1,748 |
Euro |  |  | 1,525 |  |  |  | 7,438 |
US Dollar |  |  | 97,988 |  |  |  | 78,121 |
Other currencies |  |  | 2,732 |  |  |  | 2,143 |
Trade and other accounts receivable, current |  |  | 1,244,348 |  |  |  | 1,162,582 |
Argentine peso |  |  | 47,079 |  |  |  | 82,893 |
Brazilian real |  |  | 537,221 |  |  |  | 511,171 |
Chilean peso |  |  | 126,821 |  |  |  | 113,168 |
Colombian peso |  |  | 2,288 |  |  |  | 7,259 |
Euro |  |  | 32,711 |  |  |  | 49,044 |
US Dollar |  |  | 436,774 |  |  |  | 110,312 |
Other currencies (*) |  |  | 61,454 |  |  |  | 288,735 |
Accounts receivable, non-current |  |  | 4,725 |  |  |  | 5,381 |
Brazilian real |  |  | 3 |  |  |  | 3 |
Chilean peso |  |  | 4,722 |  |  |  | 5,378 |
Accounts receivable from related entities, current |  |  | 19,645 |  |  |  | 2,931 |
Brazilian real |  |  | - |  |  |  | 293 |
Chilean peso |  |  | 42 |  |  |  | 200 |
US Dollar |  |  | 19,603 |  |  |  | 2,438 |
Total assets |  |  | 2,887,708 |  |  |  | 2,695,220 |
Argentine peso |  |  | 63,752 |  |  |  | 100,831 |
Brazilian real |  |  | 1,152,055 |  |  |  | 970,337 |
Chilean peso |  |  | 208,179 |  |  |  | 560,431 |
Colombian peso |  |  | 51,001 |  |  |  | 19,850 |
Euro |  |  | 56,163 |  |  |  | 76,821 |
US Dollar |  |  | 1,222,150 |  |  |  | 585,086 |
Other currencies |  |  | 134,408 |  |  |  | 381,864 |
| (*) | See the composition of the other currencies in Note 8 Trade, other accounts receivable and non-current accounts receivable.

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