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ACCOUNTING ESTIMATES AND JUDGMENTS (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Goodwill | $ 2,672,550 | $ 2,710,382 | $ 2,280,575 | $ 3,313,401
Deferred tax assets | 364,021 | 384,580 |  |
Recognize deferred tax assets for tax losses | (45,991) | (73,814) | 270,904 |
Deferred revenue | $ 1,550,447 | 1,535,229 |  |
Description of change in ticket usage | An hypothetical change of 1% in passenger behavior regarding to the ticket usage,—that is, if during the next six months after sells probability of used were 89% rather than 90%, as we consider, it would lead to a change in the expiry period from six to seven months, which, as of December 31, 2016, would have an impact of up to ThUS$ 20,000. |  |  |
Impact of fair value of unused kilometers | $ 8,000 | 8,400 |  |
Air Transport CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Goodwill | 2,146,692 | 2,176,634 | 1,835,088 | 2,658,503
Coalition and Loyalty Program Multiplus CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Goodwill | 525,858 | 533,748 | $ 445,487 | $ 654,898
Airport Slots [Member] | Air Transport CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Intangible assets with indefinite useful life | 964,513 | 978,849 |  |
Airport Slots [Member] | Coalition and Loyalty Program Multiplus CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Intangible assets with indefinite useful life |  |  |  |
LATAM Fidelidade and Multiplus Loyalty Program [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Deferred revenue | 364,866 | 392,107 |  |
Probable change in deferred revenue | 16,700 | 14,639 |  |
Loyalty Program [Member] | Air Transport CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Intangible assets with indefinite useful life |  |  |  |
Loyalty Program [Member] | Coalition and Loyalty Program Multiplus CGU [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Intangible assets with indefinite useful life | 321,440 | 326,262 |  |
LATAM Pass Loyalty Program [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Deferred revenue | 853,505 | 896,190 |  |
Probable change in deferred revenue | $ 25,000 | $ 30,632 |  |
Trade Marks [Member] |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |
Estimated useful life of brands from indefinite useful life | 5 years |  |  |

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