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OTHER FINANCIAL LIABILITIES - Schedule of movement of lease liabilities (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Lease Liability [Roll Forward] |  |  |
Claims amount |  |  | $ 679,273
Derecognition of right of use assets |  |  | 639,728
Conversion notes |  |  | 39,545
IBR rate amount |  |  | 316,615
Lease Liability Total |  |  |
Lease Liability [Roll Forward] |  |  |
Opening balance | $ 2,967,994 | $ 2,216,454 | 2,960,638
New contracts | 645,243 | 946,154 | 367,943
Lease termination | (72,806) | (15,070) | (19,606)
Renegotiations | 166,825 | (4,975) | (80,431)
Exit effect of chapter 11 |  |  | (995,888)
Payments | (632,214) | (399,283) | (180,995)
Accrued interest | 313,556 | 222,133 | 152,133
Exchange differences | (5,172) | 2,278 | 2,279
Cumulative translation adjustment | (9,679) | 303 | 7,461
Other increases (decreases) |  |  | 2,920
Other variations | (11,166) |  |
Changes | 394,587 | 751,540 | (744,184)
Closing balance | 3,362,581 | 2,967,994 | 2,216,454
Aircraft |  |  |
Lease Liability [Roll Forward] |  |  |
Opening balance | 2,894,198 | 2,134,972 | 2,883,661
New contracts | 576,182 | 943,178 | 354,924
Lease termination | (72,266) | (13,258) | (19,606)
Renegotiations | 96,155 | (7,194) | (76,233)
Exit effect of chapter 11 |  |  | (995,888)
Payments | (605,584) | (376,006) | (154,823)
Accrued interest | 288,165 | 212,500 | 142,939
Exchange differences | (2,090) | 0 | 0
Cumulative translation adjustment | 0 | 6 | (2)
Other increases (decreases) |  |  | 0
Other variations | 0 |  |
Changes | 280,562 | 759,226 | (748,689)
Closing balance | $ 3,174,760 | $ 2,894,198 | 2,134,972
Discount rate | 0.0909 | 0.0910 |
Other |  |  |
Lease Liability [Roll Forward] |  |  |
Opening balance | $ 73,796 | $ 81,482 | 76,977
New contracts | 69,061 | 2,976 | 13,019
Lease termination | (540) | (1,812) | 0
Renegotiations | 70,670 | 2,219 | (4,198)
Exit effect of chapter 11 |  |  | 0
Payments | (26,630) | (23,277) | (26,172)
Accrued interest | 25,391 | 9,633 | 9,194
Exchange differences | (3,082) | 2,278 | 2,279
Cumulative translation adjustment | (9,679) | 297 | 7,463
Other increases (decreases) |  |  | 2,920
Other variations | (11,166) |  |
Changes | 114,025 | (7,686) | 4,505
Closing balance | $ 187,821 | $ 73,796 | $ 81,482
Discount rate | 0.0878 | 0.0643 |

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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard -URIDate 2024-03-27 + Details
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Period Type: | instant

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- Definition The amount of notes and debentures issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Lease liabilities accrued interest. + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | credit
Period Type: | duration

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- Definition Lease liabilities cumulative translation adjustment. + References No definition available. + Details
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Namespace Prefix: | ltm_
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- Definition Derecognition of Right of Use Assets + References No definition available. + Details
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- Definition Discount Rate + References No definition available. + Details
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- Definition Lease liability exchange differences. + References No definition available. + Details
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- Definition IBR rate amount. + References No definition available. + Details
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- Definition Lease Liabilities, Changes + References No definition available. + Details
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Period Type: | duration

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- Definition Lease Liability, Other Increases (Decreases) + References No definition available. + Details
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- Definition Lease Liability + References No definition available. + Details
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- Definition Lease termination. + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | debit
Period Type: | duration

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- Definition Operating lease liabilities new contract. + References No definition available. + Details
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- Definition other variations. + References No definition available. + Details
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- Definition Lease liabilities payments. + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | debit
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- Definition The cash outflow for premiums and claims, annuities and other policy benefits. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Operating lease liability re-negotiations. + References No definition available. + Details
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- Details
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- Details
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