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COMMITMENTS AND CONTINGENCIES - Narrative (Details) | 1 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) | Sep. 30, 2025 USD ($) case | Oct. 10, 2025 USD ($) | Sep. 06, 2025 | Dec. 31, 2024 USD ($) | Apr. 08, 2022 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Reserves for proceeding-related contingencies |  | $ 177,000,000 |  |  |  |
Aggregate amount for legal actions for which no loss amount has been accrued |  | 413,000,000 |  |  |  |
Estimated litigation liabilities |  | $ 0 |  |  |  |
Previously granted injunction |  |  |  | 10.00% |  |
Withholding tax rate |  |  |  | 15.00% |  |
Air logistics services agreement term |  | 10 years |  |  |  |
Committed contract, minimum annual cost | $ 59,000,000 |  |  |  |  |
Operating lease agreement not yet commenced |  | $ 1,200,000,000 |  |  |  |
Capital Addition Purchase Commitments |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Committed contract, minimum annual cost |  | 6,000,000 |  |  |  |
Operating lease agreement not yet commenced |  | $ 34,000,000 |  |  |  |
Minimum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Operating lease term not yet commenced yet |  | 3 years |  |  |  |
Maximum |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Operating lease term not yet commenced yet |  | 15 years |  |  |  |
Air Logistics Services |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Committed contract, minimum annual cost |  | $ 301,000,000 |  |  |  | $ 378,000,000
Logistic Services |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Air logistics services agreement term | 3 years |  |  |  |  |
Committed contract, minimum annual cost |  | 33,000,000 |  |  |  |
Cloud Platform Services |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Paid in relation to the contract |  | 2,544,000,000 |  |  |  |
Fully Paid Off Between October 1, 2021 And September 30, 2026 | Cloud Platform Services |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Purchase commitment |  | 3,167,000,000 |  |  |  |
Tax Claims |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision for disputed amounts |  | 501,000,000 |  |  |  |
Judicial deposit |  | 450,000,000 |  |  |  |
Judicial deposits, interest income |  | 102,000,000 |  |  |  |
ICMS-DIFAL |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Judicial deposits, interest income |  | 2,000,000 |  |  |  |
Expected withdrawal of funds |  | 1,000,000 |  |  |  |
Provision for disputed amounts |  | $ 2,000,000 |  |  |  |
Number of ongoing cases | case |  | 3 |  |  |  |
ICMS-DIFAL | One Writ |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision for disputed amounts |  | $ 77,000,000 |  |  |  |
Total amount of claim including surcharges and interest |  | 39,000,000 |  |  |  |
Icms Difal Law No. 190/22 |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Reserves for proceeding-related contingencies |  | 33,000,000 |  |  |  |
Judicial deposit |  | 31,000,000 |  |  |  |
PIS And COFINS |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision for disputed amounts |  | 21,000,000 |  |  |  |
Buyer Protection Program |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Provision for maximum potential exposure |  | 6,533,000,000 |  |  | $ 5,769,000,000 |
Product liability, contingency, recorded allowance |  | $ 15,000,000 |  |  | $ 14,000,000 |
Subsequent Event |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Payments for judicial deposits |  |  | $ 25,000,000 |  |  |

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