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STATEMENT OF CASH FLOWS - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Supplemental Cash Flow Information [Line Items] |  |  |
DIP junior offset |  |  | $ 708,975
Gains resulting from the settlement of Chapter 11 claims | $ 0 | $ 0 | 2,550,306
Gains resulting from the settlement of Chapter 11 claims | 0 | 0 | 420,436
Extinguishment of debt under Chapter 11 | 297,161 | 0 | 2,673,256
Financial claims | 0 | 0 | 491,326
Decrease with effect in property, plant and equipment |  |  | 354,249
Decrease related to the compensation of the debt with the effect of increasing capital |  |  | 381,018
Decrease due to conversion of debt |  |  | 1,443,066
Decrease due to other minor effects |  |  | 3,596
Payments of leased maintenance | $ 246,429 | 294,549 | 149,142
Convertible Notes G, H, I |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
Convertible notes at the date of issue |  | $ 14,401 | 3,610,470
Convertible Notes H |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
DIP junior offset |  |  | 327,957
Convertible Notes I |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
DIP junior offset |  |  | $ 381,018

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- Definition Convertible Notes At The Date Of Issue + References No definition available. + Details
Name: | ltm_ConvertibleNotesAtTheDateOfIssue
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The dip junior offset. + References No definition available. + Details
Name: | ltm_DIPJuniorOffset
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Decrease Due to Compensation of Debt, Effect of Increasing Capital + References No definition available. + Details
Name: | ltm_DecreaseDueToCompensationOfDebtEffectOfIncreasingCapital
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Decrease Due to Conversion of Debt + References No definition available. + Details
Name: | ltm_DecreaseDueToConversionOfDebt
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Decrease Due to Other Minor Effects + References No definition available. + Details
Name: | ltm_DecreaseDueToOtherMinorEffects
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Decrease in Property Plant and Equipment + References No definition available. + Details
Name: | ltm_DecreaseInPropertyPlantAndEquipment
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Financial claims. + References No definition available. + Details
Name: | ltm_FinancialClaims
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Gains resulting from the settlement amount. + References No definition available. + Details
Name: | ltm_GainsResultingFromTheSettlement
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Gains resulting from the settlement of Chapter 11 claims. + References No definition available. + Details
Name: | ltm_GainsResultingFromTheSettlementOfChapter
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payments of Leased Maintenance + References No definition available. + Details
Name: | ltm_PaymentsOfLeasedMaintenance
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Extinguishment of debt under Chapter. + References No definition available. + Details
Name: | ltm_RepaymentsOfBorrowingsInterestClassifiedAsExtinguishmentOfDebtUnderChapter
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Supplemental Cash Flow Information + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | na
Period Type: | duration

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

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

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