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COSTS AND EXPENSES BY NATURE (Details) - Schedule of payments for leases of low-value assets - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of payments for leases of low-value assets [Abstract] |  |  |
Payments for leases of low-value assets | $ 19,793 | $ 21,178 | $ 31,982
Rent concessions recognized directly in profit or loss |  | (110) |
Total | $ 19,793 | $ 21,068 | $ 31,982

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- Definition Payments for leases of low-value assets. + 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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- 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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- References No definition available. + Details
Name: | ltm_ScheduleOfPaymentsForLeasesOfLowValueAssetsAbstract
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | ltm_TotalCostAndExpenses
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration