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STATEMENT OF CASH FLOWS- Schedule of property, plant and equipment and intangibles (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net cash flows from |  |  |
Purchases of property, plant and equipment | $ 795,787 | $ 780,538 | $ 597,103
Additions associated with maintenance | 337,126 | 486,231 | 302,858
Other additions | 458,661 | 294,307 | 294,245
Purchases of intangible assets | 68,052 | 50,116 | 88,518
Other additions | $ 68,052 | $ 50,116 | $ 88,518

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- Definition Amount of additions to associated with maintenance. + References No definition available. + Details
Name: | ltm_AdditionsAssociatedWithMaintenance
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Net Cash Flows From Abstract + References No definition available. + Details
Name: | ltm_NetCashFlowsFromAbstract
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of other additions. + References No definition available. + Details
Name: | ltm_OtherAdditions
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Other Additions Plant And Equipment + References No definition available. + Details
Name: | ltm_OtherAdditionsPlantAndEquipment
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchases Of Intangible Assets + References No definition available. + Details
Name: | ltm_PurchasesOfIntangibleAssets
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchases Of Property Plant And Equipment + References No definition available. + Details
Name: | ltm_PurchasesOfPropertyPlantAndEquipment
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration