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EMPLOYEE BENEFITS - Schedule of principal assumptions (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
EMPLOYEE BENEFITS [Abstract]
Discount rate	5.92%	5.40%
Expected rate of salary increase	3.00%	3.00%
Rate of turnover	2.96%	5.02%
Inflation rate	3.42%	2.99%
Retirement age of women	60 years	60 years
Retirement age of men	65 years	65 years

X

- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	na
Period Type:	instant

X

- Definition

The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
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Period Type:	instant

X

- Definition

The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 144
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

It represents the actuarial assumption of rate of turnover.

+ References

No definition available.

+ Details

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

X

- Definition

EMPLOYEE BENEFITS [Abstract]

+ References

No definition available.

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X

- Definition

It represents the retirement age of men.

+ References

No definition available.

+ Details

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Namespace Prefix:	ltm_
Data Type:	xbrli:durationItemType
Balance Type:	na
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X

- Definition

It represents the retirement age of women.

+ References

No definition available.

+ Details

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Namespace Prefix:	ltm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration