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Contingencies, commitments and restrictions on the distribution of profits - Contingencies (Details) € in Thousands, $ in Millions |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 11 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
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May 23, 2025 EUR (€) | May 22, 2025 USD ($) | Apr. 22, 2025 USD ($) | May 31, 2024 EUR (€) | May 22, 2024 USD ($) | May 09, 2024 USD ($) | Jan. 05, 2024 USD ($) | Dec. 29, 2023 USD ($) | Dec. 29, 2023 BRL (R$) | Dec. 13, 2023 USD ($) | Sep. 14, 2019 USD ($) | Sep. 14, 2019 BRL (R$) | Aug. 27, 2019 BRL (R$) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 BRL (R$) | Mar. 31, 2022 USD ($) | Nov. 30, 2023 USD ($) | Nov. 30, 2023 BRL (R$) | Dec. 31, 2025 USD ($) | Dec. 31, 2025 EUR (€) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 BRL (R$) | Dec. 31, 2018 EUR (€) contract | Dec. 31, 2014 USD ($) | Dec. 31, 2014 BRL (R$) | Dec. 31, 2025 BRL (R$) | Sep. 30, 2025 USD ($) | Jul. 31, 2025 USD ($) | Jul. 31, 2025 BRL (R$) | May 06, 2025 USD ($) | May 06, 2025 EUR (€) | Apr. 28, 2025 USD ($) | Apr. 28, 2025 ARS ($) | Sep. 11, 2024 USD ($) | Sep. 11, 2024 ARS ($) | Dec. 27, 2023 USD ($) | Dec. 27, 2023 BRL (R$) | Jan. 31, 2022 USD ($) | Sep. 10, 2021 EUR (€)
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of identified three total payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 138,600 | R$ 858,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal action to claiming for late payment of taxes |  |  |  |  |  |  |  |  |  |  | $ 209,900 | R$ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exposure to credit risk on loan commitments and financial guarantee contracts at end of period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,100,000 |  |  | $ 1,400,000 | € 1,200 |  |  |  |  |  |  |  |
Transfer to legal reserve |  | $ 2,598,000 |  |  | $ 3,743,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of profits generated transferred to statutory reserve |  | 5.00% |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation for concession |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 62,677,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of income / (loss) in associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 31,083,000 |  | $ (996,000) | 7,108,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sociedad Aeroportuaria Kuntur Wasi S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of income / (loss) in associates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 31,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TA Concession Agreement | Toscana Aeroporti S.p.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for confirmation deposit with no property passage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Natal Airport Concession Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final concession settlement receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  | R$ 9,400,000 |  | $ 1,400,000 | R$ 7,600,000 |  |  |  |  |  |  |  |  |  |
Natal Airport Concession Agreement | Inframerica Concessionaria do Aeroporto de Sao Goncalo do Amarante S.A. ("ICASGA") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final gross indemnification |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,900,000 | R$ 609,500,000 |  |
Net gain recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 166,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reversal of previous impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 103,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation for concession |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax loss carry forwards were used to compensate the current tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,400,000 | R$ 36,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of deduction on tax loss carryforwards that can be applied |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total net payment deducting all the obligations related to concession fees and including the receivables related to re-equilibriums |  |  |  |  |  |  |  | $ 41,300,000 | R$ 199,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding compensation received on account of re-bidding process |  |  |  |  |  |  | $ 90,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal proceedings claim payments | R$ |  |  |  |  |  |  |  |  |  |  |  |  | R$ 17,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of tax demanded award the plaintiff seeks in the legal matter |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200,000 | R$ 8,000,000 |  | $ 12,900,000 | R$ 80,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax Proceedings | TA Concession Agreement | Toscana Aeroporti S.p.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of guarantees constituted |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax Proceedings | Inframerica Concessionria do Aeroporto de Braslia S.A. ("ICAB") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal proceedings claim amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TAGSA legal proceedings | Inframerica Concessionria do Aeroporto de Braslia S.A. ("ICAB") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal proceedings claim amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,500,000 |
Aeropuertos del Neuqu'n S.A. ("NQN") legal proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of damages awarded to the plaintiff |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of interest on damages awarded to the plaintiff |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual interest rate on damages awarded to plaintiff |  |  |  |  |  |  |  | 8.00% | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of legal cost judgment amount |  |  |  |  |  |  |  |  |  | 53.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ANSA legal proceedings, relating to claim by a supplier for breach of contract, two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Legal proceedings claim amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of ANSAs bank accounts attached |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance offered by ANSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted the claim and ordered ANSA to pay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.2 | $ 3,000 | $ 3.4 |  |  |  |
Loss contingency damages ordered paid value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000.00 | $ 12.2 |  |  |  |  |  |
First instance proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of legal cost judgment amount, on appeal |  |  |  |  |  |  |  |  |  | 15.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Second instance proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of legal costs on the legal costs of previous proceedings |  |  |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Italian Proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement amount paid to other party | € | € 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Italian Proceedings | ARSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of preliminary sales contracts | contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursement of deposit | € |  |  |  | € 4,700 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Italian Proceedings | ARSA | First contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of contract expected price | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 72,000
Contract expected price | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Italian Proceedings | ARSA | Second contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of contract expected price | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 81
Contract expected price | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Peruvian proceedings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of damages awarded to the plaintiff |  |  |  |  |  | $ 91,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial contingent asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 91,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Peruvian proceedings | ARSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingencies, commitments and restrictions on the distribution of profits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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