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ACCOUNTING ESTIMATES AND JUDGMENTS (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Airport Slots [Member] | Air Transport CGU [Member] |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets with indefinite useful life | $ 828,969 | $ 964,513
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 |  |
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 | $ 274,420 | $ 321,440

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