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CURRENT AND DEFERRED TAXES (Details) - Schedule of deferred taxes related to items charged to equity - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of deferred taxes related to items charged to equity [Abstract]
Aggregate deferred taxation of components of other comprehensive income	$ 1,883	$ 3,287

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- Definition

The amount of income tax relating to amounts recognized in other comprehensive income.

+ References

No definition available.

+ Details

Name:	ltm_IncomeTaxRelatingToComponentOfOtherComprehensiveIncome
Namespace Prefix:	ltm_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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