STATEMENT OF CASH FLOWS (Details) - Schedule of statement of consolidated cash flow - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Schedule of statement of consolidated cash flow [Abstract]
Increases (payments)	$ (31,803)	$ (86,288)
Recoveries	8,157	349,702
Total cash flows	$ (23,646)	$ 263,414

It represent b y increase payments cash flow associated with aircraft purchase.

No definition available.

Name:	ltm_IncreasesPaymentsCashFlowsAssociatedWithAircraftPurchases
Namespace Prefix:	ltm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration