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GENERAL INFORMATION (Details Narrative) $ in Thousands |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 02, 2016 | Jan. 16, 2016 shares | Dec. 31, 2017 USD ($) Employee shares | Dec. 11, 2017 shares | Dec. 31, 2016 shares | Aug. 18, 2016 shares | Dec. 31, 2015 shares
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of revised authorized shares capital stock |  |  | 608,374,525 |  | 608,374,525 |  | 551,847,819
Number of average employees | Employee |  |  | 43,593 |  |  |  |
Number of employees | Employee |  |  | 43,095 |  |  |  |
Administrative Staff [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 6,922 |  |  |  |
Maintenance Staff [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 4,742 |  |  |  |
Operations Staff [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 15,126 |  |  |  |
Cabin Crew [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 9,016 |  |  |  |
Controls Crew [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 3,957 |  |  |  |
Sales Staff [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of employees | Employee |  |  | 3,332 |  |  |  |
Cueto Group [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of ownership interest holding by controlling shareholder |  |  | 27.91% |  |  |  |
1485 Registered Shareholders [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of share capital in form of ADRs |  |  | 4.14% |  |  |  |
Common/Ordinary Shares [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of shares subscribed and paid capital |  |  | 606,407,693 |  | 606,407,693 |  |
Number of shares issued |  |  |  |  |  | 61,316,424 |
Number of shares placed |  |  | 60,849,592 |  |  |  |
Number of revised authorized shares capital stock |  |  | 608,374,525 |  | 61,316,424 |  |
Number of shares pending of subscription and payment |  |  | 1,966,832 |  | 4,789,718 |  |
Number of shares allocated for stock option plan |  |  | 1,500,000 |  |  |  |
Number of balances shares for placement of the last capital increase |  |  | 466,832 |  |  |  |
Number of previously authorized shares capital stock |  |  |  |  | 613,164,243 |  |
Number of shares for subscription and payment expired |  |  | 30,499,685 |  | 4,789,718 |  |
TAM S.A. and Subsidiaries [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of balances shares for placement of the last capital increase |  |  |  | 210,000 |  |  |
Lan Pax Group S.A. and Subsidiaries [Member] | Class C [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Number of shares placed |  | 90,000,000 |  |  |  |  |
Percentage of equity ownership |  | 99.8656% |  |  |  |  |
Percentage of ownership chages for capital increase |  | 4.87% |  |  |  |  |
Peuco Finance Limited [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of equity ownership |  |  | 100.00% |  |  |  |
Inmobiliaria Aeronautica S.A. [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of equity ownership |  |  | 100.00% |  |  |  |
Rampas Andes Airport Services S.A. [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Sale value | $ |  |  | $ 8,624 |  |  |  |
TEP Chile S.A [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Maximum percentage of voting rights |  |  | 51.00% |  |  |  |
Number of voting shares hold |  |  | 938 |  |  |  |
Holdco I S.A [Member] | TAM S.A. and Subsidiaries [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of economic rights |  |  | 99.99% |  |  |  |
Percentage of rights politicians product |  |  | 49.00% |  |  |  |
Maximum percentage of voting rights |  |  | 49.00% |  |  |  |
Number of voting shares hold |  |  | 901 |  |  |  |
Aerovias de Integracion Regional, AIRES S.A. [Member] | Inversiones Lan S.A. and Subsidiaries [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of equity ownership |  |  | 99.1941% |  |  |  |
Decrease in ownership interest |  |  | 9.498% |  |  |  |
Number of shares acquired |  |  | 4,951 |  |  |  |
Multiplus Corretora de Seguros Ltda [Member] | TAM S.A. and Subsidiaries [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of equity ownership | 99.99% |  |  |  |  |  |
Multiplus Corretora de Seguros Ltda [Member] | TAM S.A. and Subsidiaries [Member] | Prismah Fidelidade Ltda [Member] |  |  |  |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |  |  |  |
Percentage of equity ownership |  |  | 99.99% |  |  |  |

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