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EQUITY - Schedule of balance of other sundry reserves (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Sundry Reserves [Roll Forward] |  |  |
Opening balance | $ 39 |  |
Transactions with non-controlling interest | (120,475) | $ 5,731,546 | $ (3,608)
Closing balance | 39 | 39 |
Other Sundry Reserves |  |  |
Other Sundry Reserves [Roll Forward] |  |  |
Opening balance | (1,972,651) | 2,448,098 | 2,452,019
Transactions with non-controlling interest | 16,648 | 0 | (3,383)
Legal reserves |  | 0 | (538)
Other sundry reserves | (14,401) | (4,420,749) | 0
Others increases (Decreases) | 800,388 | 0 | 0
Closing balance | $ (1,170,016) | $ (1,972,651) | $ 2,448,098

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- Definition The increase (decrease) in equity resulting from transactions with owners. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106_d&doctype=Standard -URIDate 2023-03-23 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_e&doctype=Standard -URIDate 2023-03-23 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Legal Reserves + References No definition available. + Details
Name: | ltm_LegalReserves
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other Sundry Reserves + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other Sundry Reserves + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Others Increases (Decreases) Sundry Reserves + References No definition available. + Details
Name: | ltm_OthersIncreasesDecreasesSundryReserves
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |