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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | $ 10,065,335 |  | $ 10,498,149 |  | $ 10,938,657 | $ 10,773,076
Construction in Progress [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 556,822 | [1] | 470,065 | [2] | 1,142,812 | 937,279
Land [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 49,780 |  | 50,148 |  | 45,313 | 57,988
Buildings [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 124,548 |  | 130,219 |  | 91,491 | 167,006
Plant and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 6,832,398 |  | 7,749,542 |  |  |
Own Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 6,405,573 |  | 7,313,659 |  |  |
Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value | [3] | 426,825 |  | 435,883 |  |  |
Machinery [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 9,788 |  | 12,425 |  |  |
Information Technology Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 30,156 |  | 39,714 |  | 43,889 | 51,009
Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 80,777 |  | 83,912 |  | 88,958 | 43,783
Motor Vehicles [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 11,478 |  | 28,953 |  |  |
Leasehold Improvements [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 84,225 |  | 104,541 |  | 54,088 | 56,523
Other Property, Plants and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 2,285,363 |  | 1,828,630 |  | $ 2,129,506 | $ 2,503,434
Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 2,222,620 |  | 1,753,366 |  |  |
Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 62,743 |  | 75,264 |  |  |
Gross Book Value [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 14,310,287 |  | 14,486,764 |  |  |
Gross Book Value [Member] | Construction in Progress [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value | [1] | 556,822 |  | 470,065 |  |  |
Gross Book Value [Member] | Land [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 49,780 |  | 50,148 |  |  |
Gross Book Value [Member] | Buildings [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 190,552 |  | 190,771 |  |  |
Gross Book Value [Member] | Plant and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 9,222,540 |  | 10,099,587 |  |  |
Gross Book Value [Member] | Own Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 8,544,185 |  | 9,436,684 |  |  |
Gross Book Value [Member] | Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value | [3] | 678,355 |  | 662,903 |  |  |
Gross Book Value [Member] | Machinery [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 39,084 |  | 39,246 |  |  |
Gross Book Value [Member] | Information Technology Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 166,713 |  | 163,695 |  |  |
Gross Book Value [Member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 186,989 |  | 178,363 |  |  |
Gross Book Value [Member] | Motor Vehicles [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 70,290 |  | 96,808 |  |  |
Gross Book Value [Member] | Leasehold Improvements [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 186,679 |  | 192,100 |  |  |
Gross Book Value [Member] | Other Property, Plants and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 3,640,838 |  | 3,005,981 |  |  |
Gross Book Value [Member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 3,551,041 |  | 2,905,556 |  |  |
Gross Book Value [Member] | Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | 89,797 |  | 100,425 |  |  |
Accumulated Depreciation [member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (4,244,952) |  | (3,988,615) |  |  |
Accumulated Depreciation [member] | Construction in Progress [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value | [1] |  |  |  |  |  |
Accumulated Depreciation [member] | Land [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  |  |  |  |  |  |
Accumulated Depreciation [member] | Buildings [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (66,004) |  | (60,552) |  |  |
Accumulated Depreciation [member] | Plant and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (2,390,142) |  | (2,350,045) |  |  |
Accumulated Depreciation [member] | Own Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (2,138,612) |  | (2,123,025) |  |  |
Accumulated Depreciation [member] | Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value | [3] | (251,530) |  | (227,020) |  |  |
Accumulated Depreciation [member] | Machinery [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (29,296) |  | (26,821) |  |  |
Accumulated Depreciation [member] | Information Technology Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (136,557) |  | (123,981) |  |  |
Accumulated Depreciation [member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (106,212) |  | (94,451) |  |  |
Accumulated Depreciation [member] | Motor Vehicles [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (58,812) |  | (67,855) |  |  |
Accumulated Depreciation [member] | Leasehold Improvements [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (102,454) |  | (87,559) |  |  |
Accumulated Depreciation [member] | Other Property, Plants and Equipment [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (1,355,475) |  | (1,177,351) |  |  |
Accumulated Depreciation [member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | (1,328,421) |  | (1,152,190) |  |  |
Accumulated Depreciation [member] | Other [Member] |  |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |  |
Book Value |  | $ (27,054) |  | $ (25,161) |  |  |
[1] | As of December 31, 2017, includes pre-delivery payments to aircraft manufacturers for ThUS$ 543,720 (ThUS$ 434,250 as of December 31, 2016).
[2] | It includes pre-delivery payments to aircraft manufacturers for ThUS$ 434,250 (ThUS$ 1,016,007 as of December 31, 2015).
[3] | Mainly considers rotable and tools.

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