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SEGMENTAL INFORMATION (Details Narrative)	Dec. 31, 2017 Member Segment
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

X

- 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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- Definition

Refers to the number of member of coalition system.

+ References

No definition available.

+ Details

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Namespace Prefix:	ltm_
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Balance Type:	na
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X

- Definition

It represents the number of operating segments.

+ References

No definition available.

+ Details

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Namespace Prefix:	ltm_
Data Type:	xbrli:integerItemType
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X

- Details

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