| 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 |
|---|---|---|---|---|---|---|---|---|---|
| Net income | |||||||||
| Revenues | |||||||||
| Costs | |||||||||
| Gross profit | |||||||||
| Selling expenses | |||||||||
| Administrative expenses | |||||||||
| Exploration expenses | |||||||||
| Reversal / (Impairment) of property, plant and equipment and inventories write-down | |||||||||
| Other net operating results | |||||||||
| Operating profit / (loss) | |||||||||
| Income from equity interests in associates and joint ventures | |||||||||
| Financial income | |||||||||
| Financial costs | |||||||||
| Other financial results | |||||||||
| Net financial results | |||||||||
| Net profit / (loss) before income tax | |||||||||
| Income tax | |||||||||
| Net (loss) / profit for the year | |||||||||
| Items that may be reclassified subsequently to profit or loss: | |||||||||
| Translation effect from subsidiaries, associates and joint ventures | |||||||||
| Result from net monetary position in subsidiaries, associates and joint ventures | |||||||||
| Gains / (losses) reclassified to profit or loss due to the acquisition and/or disposal of subsidiaries, associates and joint ventures | |||||||||
| Other comprehensive income for the year | |||||||||
| Total comprehensive income for the year | |||||||||
| Net (loss) / profit for the year attributable to: | |||||||||
| Shareholders of the parent company | |||||||||
| Non-controlling interest | |||||||||
| Other comprehensive income for the year attributable to: | |||||||||
| Shareholders of the parent company | |||||||||
| Non-controlling interest | |||||||||
| Total comprehensive income for the year attributable to: | |||||||||
| Shareholders of the parent company | |||||||||
| Non-controlling interest | |||||||||
| Earnings per share attributable to shareholders of the parent company: | |||||||||
| Basic | |||||||||
| Diluted |