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OTHER INCOME, BY FUNCTION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of other operating income [text block] [Abstract]
Delta airlines compensation	$ 118,188	$ 132,467

X

- Definition

The amount of compensation from third parties.

+ References

No definition available.

+ Details

Name:	ltm_DeltaAirLineIncCompensation
Namespace Prefix:	ltm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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