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SHARE-BASED PAYMENTS (Details) - Schedule of payments based on restricted stock - Restricted Stock [Member] - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
SHARE-BASED PAYMENTS (Details) - Schedule of payments based on restricted stock [Line Items] |  |
Opening balance | $ 216,836 | $ 309,710
Exercised |  | (83,958)
Not acquired due to breach of employment retention conditions |  | (8,916)
Closing balance | $ 216,836 | $ 216,836

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- Definition Number of shares issued during period of restricted stock. + References No definition available. + Details
Name: | ltm_NumberOfSharesIssuedDuringPeriodSharesRestrictedStock
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | ltm_SHAREBASEDPAYMENTSDetailsScheduleofpaymentsbasedonrestrictedstockLineItems
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares related to exercised to restricted Stock during the period. + References No definition available. + Details
Name: | ltm_StockIssuedDuringPeriodExcercisecRestrictedStock
Namespace Prefix: | ltm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares related to Not acquired due to to breach of employment retention conditions restricted Stock during the period. + References No definition available. + Details
Name: | ltm_StockIssuedDuringPeriodOthersOfRestrictedStock
Namespace Prefix: | ltm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |