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Financial Risk Management - Maturity analysis of contract obligation for the construction of the X and F class vessels (Details) € in Thousands, $ in Millions | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2025 EUR (€) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Financial risk management |  |  |  |  |  |  |
Sum of contract paid for new vessels |  | € 615,542 | € 66,899 | € 224,606 |  |  |
Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 1,395,000 | 1,385,000 | 962,000 |  |  |
USD | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 1,290,000 | 1,211,000 | 775,000 | $ 1,342 | $ 1,341 | $ 816
EUR | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 105,000 | 174,000 | 187,000 |  |  |
Forecast | Payment Of Contractual Obligations | Vessels |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Sum of contract paid for new vessels | € 455,000 |  |  |  |  |  |
Less than 1 year | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 6,911,000 | 365,000 | 13,000 |  |  |
Less than 1 year | USD | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 626,000 | 296,000 |  | 651 | 328 |
Less than 1 year | EUR | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 65,000 | 69,000 | 13,000 |  |  |
Between 1 and 2 years | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 516,000 | 851,000 | 256,000 |  |  |
Between 1 and 2 years | USD | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 476,000 | 752,000 | 187,000 | 496 | 833 | 197
Between 1 and 2 years | EUR | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 40,000 | 99,000 | 69,000 |  |  |
Between 2 and 5 years | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | 188,000 | 169,000 | 693,000 |  |  |
Between 2 and 5 years | USD | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  | € 188,000 | 163,000 | 588,000 | $ 195 | $ 180 | $ 619
Between 2 and 5 years | EUR | Liquidity risk |  |  |  |  |  |  |
Financial risk management |  |  |  |  |  |  |
Total obligations |  |  | € 6,000 | € 105,000 |  |  |

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