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CURRENT AND DEFERRED TAXES - Schedule of deferred taxes related to items charged to equity (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Income Tax [Abstract] |  |  |
Aggregate deferred taxation of components of other comprehensive income | $ 909 | $ 4,355 | $ 332

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- Definition Disclosure Of Income Tax + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | na
Period Type: | duration

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- Definition The amount of income tax relating to amounts recognized in other comprehensive income. + References No definition available. + Details
Name: | ltm_IncomeTaxRelatingToComponentOfOtherComprehensiveIncome
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration