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FINANCIAL RISK MANAGEMENT (Details) - Schedule of sensitivity analysis - FX [Member] - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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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 |

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- Definition It represents the amount of effect on equity. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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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
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Namespace Prefix: | ltm_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- 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: |
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Balance Type: |
Period Type: |