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TRADE AND OTHER ACCOUNTS RECEIVABLE CURRENT, AND NON- CURRENT ACCOUNTS RECEIVABLE (Details) - Schedule of provision for impairment losses of trade debtors and other accounts receivable - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of provision for impairment losses of trade debtors and other accounts receivable [Abstract] |  |  |
Opening balance | $ (122,193) | $ (100,402) | $ (97,991)
Write-offs | 26,435 | 30,754 | 12,569
(Increase) Decrease | 14,754 | (52,545) | (14,980)
Closing balance | $ (81,004) | $ (122,193) | $ (100,402)

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- Definition Amount of increase decrease allowance for credit losses related to receivables. + References No definition available. + Details
Name: | ltm_IncreaseDecreaseAllowanceForImpairmentLoss
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | ltm_ScheduleOfProvisionForImpairmentLossesOfTradeDebtorsAndOtherAccountsReceivableAbstract
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition It represents the amount of trade receivables allowance for impairment loss. + References No definition available. + Details
Name: | ltm_TradeReceivablesAllowanceForImpairmentLoss
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of write off allowance for credit losses related to receivables. + References No definition available. + Details
Name: | ltm_WriteOffsAllowanceForImpairmentLoss
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration