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FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis - FX [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Top of range [member]
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]
Appreciation (depreciation)	(10.00%)
Effect on equity	$ (2.9)
Bottom of range [member]
FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis [Line Items]
Appreciation (depreciation)	10.00%
Effect on equity	$ 3.0

X

- Definition

It represents the amount of effect on equity.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

It represents the percentage of appreciation and depreciation on foreign currency.

+ References

No definition available.

+ Details

Name:	ltm_PercentageOfApperciationAndDeperciationOnForeginCurrency
Namespace Prefix:	ltm_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ltm_FXMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
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Period Type: