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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 04, 2018 | Jan. 02, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ 1,081,642 |  |  |  | $ 1,142,004 |  | $ 949,327 | $ 753,497
Other financial assets, current |  | 383,984 |  |  | $ 275,549 | 559,919 |  |  |
Trade and others accounts receivable, current |  | 1,162,582 |  |  | 1,202,945 | 1,214,050 |  |  |
Accounts receivable from related entities, current |  | 2,931 |  |  |  | 2,582 |  |  |
Other non-financial assets |  | 320,977 |  |  |  | 221,188 |  |  |
Accounts receivable, non current |  | 5,381 |  |  |  | 6,891 |  |  |
Total assets |  | 17,566,777 |  | $ 5,129 |  | 18,797,972 |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Trade and other accounts payables, current |  | 1,674,303 |  |  | 1,673,010 | 1,695,202 |  |  |
Other financial liabilities, non-current |  | 2,454,746 |  |  | 2,901,603 | 2,823,963 |  |  |
Total liabilities |  | 13,820,001 |  | $ 377 |  | 14,530,736 |  |  |
Other Financial Liabilities [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  |  | 1,288,749 |  |  |
Trade and other accounts payables, current |  |  |  |  |  | 1,695,202 |  |  |
Accounts payable to related entities, current |  |  |  |  |  | 760 |  |  |
Other financial liabilities, non-current |  |  |  |  |  | 6,602,891 |  |  |
Accounts payable, non-current |  |  |  |  |  | 498,832 |  |  |
Total liabilities |  |  |  |  |  | 10,086,434 |  |  |
Held Hedge Derivatives [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  |  | 12,200 |  |  |
Trade and other accounts payables, current |  |  |  |  |  |  |  |  |
Accounts payable to related entities, current |  |  |  |  |  |  |  |  |
Other financial liabilities, non-current |  |  |  |  |  | 2,617 |  |  |
Accounts payable, non-current |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  |  | 14,817 |  |  |
Measured At Amortized Cost [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  | 1,404,868 |  |  |  |  |  |  |
Trade and other accounts payables, current |  | 1,674,303 |  |  |  |  |  |  |
Accounts payable to related entities, current |  | 382 |  |  |  |  |  |  |
Other financial liabilities, non-current |  | 5,864,570 |  |  |  |  |  |  |
Accounts payable, non-current |  | 483,656 |  |  |  |  |  |  |
Total liabilities |  | 9,427,779 |  |  |  |  |  |  |
Financial liabilities [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  | 1,430,789 |  |  |  | 1,300,949 |  |  |
Trade and other accounts payables, current |  | 1,674,303 |  |  |  | 1,695,202 |  |  |
Accounts payable to related entities, current |  | 382 |  |  |  | 760 |  |  |
Other financial liabilities, non-current |  | 5,864,910 |  |  |  | 6,605,508 |  |  |
Accounts payable, non-current |  | 483,656 |  |  |  | 498,832 |  |  |
Total liabilities |  | 9,454,040 |  |  |  | 10,101,251 |  |  |
Loans And Receivables [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | 1,112,346 |  |  |
Other financial assets, current | [1] |  |  |  |  | 23,918 |  |  |
Trade and others accounts receivable, current |  |  |  |  |  | 1,214,050 |  |  |
Accounts receivable from related entities, current |  |  |  |  |  | 2,582 |  |  |
Other non-financial assets | [1] |  |  |  |  | 87,077 |  |  |
Accounts receivable, non current |  |  |  |  |  | 6,891 |  |  |
Total assets |  |  |  |  |  | 2,446,864 |  |  |
Hedge Derivatives [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |
Other financial assets, current |  | 23,355 | [2] |  |  | 62,348 | [1] |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  | [2] |  |  | 519 | [1] |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  | 23,355 |  |  |  | 62,867 |  |  |
Held For Trading [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |
Other financial assets, current | [1] |  |  |  |  | 1,421 |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets | [1] |  |  |  |  | 494 |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  | 1,915 |  |  |
Initial Designation As Fair Value Through Profit And Loss [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | 29,658 |  |  |
Other financial assets, current | [1] |  |  |  |  | 472,232 |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets | [1] |  |  |  |  |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  | 501,890 |  |  |
Measured At Amortized Cost [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | 1,037,989 |  |  |  |  |  |  |
Other financial assets, current | [2] | 16,203 |  |  |  |  |  |  |
Trade and others accounts receivable, current |  | 1,162,582 |  |  |  |  |  |  |
Accounts receivable from related entities, current |  | 2,931 |  |  |  |  |  |  |
Other non-financial assets | [2] | 58,700 |  |  |  |  |  |  |
Accounts receivable, non current |  | 5,381 |  |  |  |  |  |  |
Total assets |  | 2,283,786 |  |  |  |  |  |  |
At Fair Value With Changes In Results [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Total assets |  | 388,079 |  |  |  |  |  |  |
Financial Assets [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | 1,081,642 |  |  |  | 1,142,004 |  |  |
Other financial assets, current |  | 383,984 | [2] |  |  | 559,919 | [1] |  |
Trade and others accounts receivable, current |  | 1,162,582 |  |  |  | 1,214,050 |  |  |
Accounts receivable from related entities, current |  | 2,931 |  |  |  | 2,582 |  |  |
Other non-financial assets |  | 58,700 | [2] |  |  | 88,090 | [1] |  |
Accounts receivable, non current |  | 5,381 |  |  |  | 6,891 |  |  |
Total assets |  | $ 2,695,220 |  |  |  | 3,013,536 |  |  |
Classification IAS 39 [Member] | Other Financial Liabilities [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  | (1,288,749) |  |  |  |
Trade and other accounts payables, current |  |  |  |  | (1,695,202) |  |  |  |
Accounts payable to related entities, current |  |  |  |  | (760) |  |  |  |
Other financial liabilities, non-current |  |  |  |  | (6,602,891) |  |  |  |
Accounts payable, non-current |  |  |  |  | (498,832) |  |  |  |
Total liabilities |  |  |  |  |  | 10,086,434 |  |  |
Classification IAS 39 [Member] | Held Hedge Derivatives [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  |  |  |  |  |
Trade and other accounts payables, current |  |  |  |  |  |  |  |  |
Accounts payable to related entities, current |  |  |  |  |  |  |  |  |
Other financial liabilities, non-current |  |  |  |  |  |  |  |  |
Accounts payable, non-current |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  | 14,817 | 14,817 |  |  |
Classification IAS 39 [Member] | Loans And Receivables [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | (1,112,346) |  |  |  |
Other financial assets, current |  |  |  |  | (23,918) |  |  |  |
Trade and others accounts receivable, current |  |  |  |  | (1,214,050) |  |  |  |
Accounts receivable from related entities, current |  |  |  |  | (2,582) |  |  |  |
Other non-financial assets |  |  |  |  | (87,077) |  |  |  |
Accounts receivable, non current |  |  |  |  | (6,891) |  |  |  |
Total assets |  |  |  |  |  | 2,446,864 |  |  |
Classification IAS 39 [Member] | Hedge Derivatives [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |
Other financial assets, current |  |  |  |  |  |  |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  |  |  |  |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  | 62,867 | 62,867 |  |  |
Classification IAS 39 [Member] | Held For Trading [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |
Other financial assets, current |  |  |  |  | (1,421) |  |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  |  |  | (494) |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  | 1,915 |  |  |
Classification IAS 39 [Member] | Initial Designation As Fair Value Through Profit And Loss [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | (29,658) |  |  |  |
Other financial assets, current |  |  |  |  | (472,232) |  |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  |  |  |  |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  | 501,890 |  |  |
Classification IFRS 9 [Member] | Measured At Amortized Cost [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  | 1,288,749 |  |  |  |
Trade and other accounts payables, current |  |  |  |  | 1,695,202 |  |  |  |
Accounts payable to related entities, current |  |  |  |  | 760 |  |  |  |
Other financial liabilities, non-current |  |  |  |  | 6,602,891 |  |  |  |
Accounts payable, non-current |  |  |  |  | 498,832 |  |  |  |
Total liabilities |  |  |  |  | 10,086,434 |  |  |  |
Classification IFRS 9 [Member] | Financial liabilities [Member] |  |  |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |  |  |
Other liabilities, current |  |  |  |  |  |  |  |  |
Trade and other accounts payables, current |  |  |  |  |  |  |  |  |
Accounts payable to related entities, current |  |  |  |  |  |  |  |  |
Other financial liabilities, non-current |  |  |  |  |  |  |  |  |
Accounts payable, non-current |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  | 10,101,251 | 10,101,251 |  |  |
Classification IFRS 9 [Member] | Measured At Amortized Cost [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | 1,112,346 |  |  |  |
Other financial assets, current |  |  |  |  | 23,918 |  |  |  |
Trade and others accounts receivable, current |  |  |  |  | 1,214,050 |  |  |  |
Accounts receivable from related entities, current |  |  |  |  | 2,582 |  |  |  |
Other non-financial assets |  |  |  |  | 87,077 |  |  |  |
Accounts receivable, non current |  |  |  |  | 6,891 |  |  |  |
Total assets |  |  |  |  | 2,446,864 |  |  |  |
Classification IFRS 9 [Member] | At Fair Value With Changes In Results [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | 29,658 | 43,653 |  |  |
Other financial assets, current |  |  |  |  | 473,653 | 344,426 |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  |  |  | 494 |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  | 503,805 |  |  |  |
Classification IFRS 9 [Member] | Financial Assets [Member] |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  |  |  |
Other financial assets, current |  |  |  |  |  |  |  |  |
Trade and others accounts receivable, current |  |  |  |  |  |  |  |  |
Accounts receivable from related entities, current |  |  |  |  |  |  |  |  |
Other non-financial assets |  |  |  |  |  |  |  |  |
Accounts receivable, non current |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  | $ 3,013,536 | $ 3,013,536 |  |  |
[1] | The value presented as initial designation as fair value through profit and loss, corresponds mainly to private investment funds; and loans and receivables corresponds to guarantees given.
[2] | The value presented in designated at the initial moment at fair value with changes in results, corresponds mainly to private investment funds, and in loans and accounts receivable, corresponds to guarantees delivered.

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