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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, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net cash flows from |  |  |
Purchases of property, plant and equipment | $ 1,325,463 | $ 795,787 | $ 780,538
Additions associated with maintenance | 358,475 | 337,126 | 486,231
Other additions | 966,988 | 458,661 | 294,307
Purchases of intangible assets | 94,412 | 68,052 | 50,116
Other additions | $ 94,412 | $ 68,052 | $ 50,116

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- Definition Amount of additions to associated with maintenance. + References No definition available. + Details
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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

X
- 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