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INTANGIBLE ASSETS OTHER THAN GOODWILL - Schedule of annual growth rates, discounts, exchange rates and fuel price (Details) - Air Transportation CGU	12 Months Ended
	Dec. 31, 2024 $ / bbl
Intangible Assets Other Than Goodwill [Line Items]
Increase WACC Maximum	10.20%
Decrease rate Terminal growth Minimal	0.00%
Increase fuel price Maximum US$/barrel (usd per barrel)	100

X

- Definition

Decrease Rate Terminal Growth Minimal

+ References

No definition available.

+ Details

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Namespace Prefix:	ltm_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase Fuel Price Maximum1

+ References

No definition available.

+ Details

Name:	ltm_IncreaseFuelPriceMaximum1
Namespace Prefix:	ltm_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase WACCMaximum

+ References

No definition available.

+ Details

Name:	ltm_IncreaseWACCMaximum
Namespace Prefix:	ltm_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Intangible Assets Other Than Goodwill

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=ltm_AirTransportationCGUMember
Namespace Prefix:
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Balance Type:
Period Type: