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GENERAL INFORMATION (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 13, 2018 | Nov. 20, 2019 | Apr. 30, 2019 | Jan. 22, 2018 shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 shares
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of shares pending of subscription and payment (in Shares) |  |  |  |  | 466,832 |
Number of average employees |  |  |  |  | 41,043 |
Number of employees |  |  |  |  | 41,729 |
Value of acquisition transaction (in Dollars) | $ |  |  |  |  | $ 294,105 |
Cueto Group [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Percentage of ownership shares issued |  |  |  |  | 21.46% |
Shareholders [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Total of shareholders |  |  |  |  | 1,228 |
Percentage of share capital in form of ADRs |  |  |  |  | 4.17% |
Andes Airport Services S.A. [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Sale value (in Dollars) | $ |  |  |  |  | $ 39,108 |
Administrative Staff [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 6,966 |
Maintenance Staff [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 4,911 |
Operations Staff [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 13,538 |
Cabin Crew [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 9,511 |
Cockpit Crew [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 4,298 |
Sales Staff [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of employees |  |  |  |  | 2,505 |
Ordinary shares [member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of ordinary shares (in Shares) |  |  |  |  | 606,407,693 | 606,407,693
Number of shares pending of subscription and payment (in Shares) |  |  |  |  | 466,832 |
Holdco I S.A [Member] | TAM S.A. and Subsidiaries [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Percentage of economic rights |  |  |  |  | 99.9983% |
TAM S.A. and Subsidiaries [Member] | Holdco I S.A [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Percentage of rights politicians product |  |  |  |  | 51.04% |
Percentage of allows foreign capital |  |  |  |  | 100.00% |
Sale value (in Dollars) | $ |  |  |  |  | $ 29,466 |
Lan Pax Group S.A [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Number of purchased shares (in Shares) |  |  |  | 17,717 |  |
Percentage of ownership changes for capital increase |  |  |  | 3.77922% |  |
Percentage of equity ownership |  |  |  | 96.22078% |  |
Percentage from inversiones | 1.00% |  |  |  |  |
LATAM Airlines Group S.A. [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Percentage of equity ownership | 99.00% | 100.00% |  |  |  |
Inversiones Lan S.A. and Subsidiaries [Member] | Aerovias de Integracion Regional, AIRES S.A. [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Percentage of equity ownership |  |  |  |  |  | 99.2012%
Number of shares acquired (in Shares) |  |  |  |  |  | 5,319,000
Tam Linhas Aereas S.A [Member] |  |  |  |  |  |
GENERAL INFORMATION (Details) [Line Items] |  |  |  |  |  |
Description of acquired shares |  |  | TAM Linhas Aereas S.A, through a public offering of shares, acquired 27.26% of the shares of Multiplus S.A., owned by minority shareholders. Subsequently, the Company TAM S.A assigned 72.74% of its stake in Multiplus S.A., through a capital increase, to TAM Linhas Aerea S.A.; Because of 100% of the shares remain under the control of TAM Linhas Aereas S.A. a merge with Multiplus S.A. was materialized, leaving Multiplus S.A. from being an independent company on May 31, 2019. |  |  |

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