XML 100 R83.htm IDEA: XBRL DOCUMENT
v3.8.0.1

FINANCIAL RISK MANAGEMENT (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Fuel-Price Risk [Member] | Fuel Derivative [Member] |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |
Percentage of coverage over the expected volume of consumption | [1] | 5.00% | 12.00% | 19.00% | 1600.00% | 2100.00% | 12.00% | 1800.00%
[1] | The volume shown in the table considers all the hedging instruments (swaps and options).

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ltm_FuelPriceRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgingInstrumentsAxis=ltm_FuelDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |