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COMMITMENTS (Details) - USD ($) $ in Millions	Dec. 31, 2020	Sep. 29, 2020
COMMITMENTS (Details) [Line Items]
Revolving credit facility		$ 400
Top of range [member]
COMMITMENTS (Details) [Line Items]
Revolving credit facility	$ 600
Bottom of range [member]
COMMITMENTS (Details) [Line Items]
Revolving credit facility	750
Tam Linhas Aereas S.A. [Member]
COMMITMENTS (Details) [Line Items]
Revolving credit facility	$ 400

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- References

No definition available.

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- Definition

It represents the amount of line of credit revolving facility.

+ References

No definition available.

+ Details

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

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- Details

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- Details

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- Details

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