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COMMITMENTS (Details Narrative) $ in Thousands	Dec. 31, 2017 USD ($)
LATAM Airlines Group S.A. [Member]
Disclosure of transactions between related parties [line items]
Revolving credit facility	$ 450,000
Tam Linhas Aereas S.A. [Member]
Disclosure of transactions between related parties [line items]
Revolving credit facility	$ 450,000

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

Name:	ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

It represents the amount of line of credit revolving facility.

+ References

No definition available.

+ Details

Name:	ltm_LineOfCreditRevolvingFacility
Namespace Prefix:	ltm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ltm_LATAMAirlinesGroupSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ltm_TAMLinhasAereasSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: