| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | |||||||||
| Net revenues | |||||||||
| Cost of revenues | |||||||||
| Selling, general and other costs | |||||||||
| Research and development costs | |||||||||
| Gains/(losses) on disposal of investments | |||||||||
| Restructuring costs | |||||||||
| Share of the profit/(loss) of equity method investees | |||||||||
| Total | |||||||||
| Net financial expenses/(income) | |||||||||
| Profit/(loss) before taxes | |||||||||
| Tax expense/(benefit) | |||||||||
| Net profit/(loss) | |||||||||
| Net profit/(loss) attributable to: | |||||||||
| Owners of the parent | |||||||||
| Non-controlling interests | |||||||||
| Earnings/(loss) per share: | |||||||||
| Basic earnings per share (in EUR per share) | |||||||||
| Diluted earnings per share (in EUR per share) |