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NON-CURRENT ASSETS AND DISPOSAL GROUP CLASSIFIED AS HELD FOR SALE (Details)	Dec. 31, 2019 USD ($)
Disclosure of non-current assets or disposal groups classified as held for sale [text block] [Abstract]
Assets reclassified from inventories net realizable value	$ 2

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- Definition

It repesent by assets reclassified from inventories net realizable value.

+ References

No definition available.

+ Details

Name:	ltm_AssetsReclassifiedFromInventoriesNetRealizableValue
Namespace Prefix:	ltm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	ltm_DisclosureOfNonCurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleTextBlockAbstract
Namespace Prefix:	ltm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration