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FINANCIAL RISK MANAGEMENT (Details) - Schedule of level of hedge | 3 Months Ended | 12 Months Ended | 15 Months Ended
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Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2021
Schedule of level of hedge [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of coverage over the expected volume of consumption | 14.00% | [1] | 30.00% | [1] | 25.00% | [1] | 3.00% | [2] | 3.00% | [2] | 21.00% | [1] | 3.00% | [2] | 17.00% | [1] | 3.00% | [2] | 3.00% | [2]
[1] | The percentage shown in the table considers all the hedging instruments (swaps and options).
[2] | The volume shown in the table considers all the hedging instruments (swaps and options).

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- Definition It represents the percentage of hedge expected consumption value. + References No definition available. + Details
Name: | ltm_PercentageOfHedgeOfExpectedConsumptionValue
Namespace Prefix: | ltm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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