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COSTS AND EXPENSES BY NATURE - Schedule of finance costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Material income and expense [abstract] |  |  |
Bank loan interests | $ (452,778) | $ (400,052) | $ (714,310)
Financial leases | (49,809) | (58,011) | (45,384)
Lease liabilities | (318,267) | (224,824) | (152,132)
Other financial expenses | (61,096) | (15,344) | (30,577)
Total | $ (881,950) | $ (698,231) | $ (942,403)

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- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 82 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_b&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
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- Definition The amount of costs associated with bank loan interest activities of the entity. + References No definition available. + Details
Name: | ltm_BankLoanInterest
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Finance Lease Cost + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease Liabilities Cost + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of costs associated with other financial instruments activities of the entity. + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration