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SEGMENTAL INFORMATION (Details Narrative) | Dec. 31, 2017 Member Segment
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Disclosure of operating segments [line items] |
Number of operating segment | Segment | 2
Coalition And Loyalty Program Multiplus [Member] |
Disclosure of operating segments [line items] |
Number of member for loyalty coalition | Member | 19,400,000

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
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- Definition Refers to the number of member of coalition system. + References No definition available. + Details
Name: | ltm_NumberOfMemberForLoyaltyCoalition
Namespace Prefix: | ltm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition It represents the number of operating segments. + References No definition available. + Details
Name: | ltm_NumberOfOperatingSegment
Namespace Prefix: | ltm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |