| 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 |
|---|---|---|---|---|---|---|---|---|---|
| Operating expenses from mining business [abstract] | |||||||||
| Interest income | |||||||||
| Interest expense | |||||||||
| Net interest income | |||||||||
| Commissions income | |||||||||
| Commissions expense | |||||||||
| Net commissions income | |||||||||
| Subtotal (Net interest income plus Net commissions income) | |||||||||
| Net gain from measurement of financial instruments at fair value through profit or loss | |||||||||
| Profit from sold or derecognized assets at amortized cost | |||||||||
| Differences in quoted prices of gold and foreign currency | |||||||||
| Other operating income | |||||||||
| Credit loss expense on financial assets | |||||||||
| Net operating income before expenses, depreciation and amortization | |||||||||
| Employee benefits | |||||||||
| Administrative expenses | |||||||||
| Depreciation and amortization of fixed assets | |||||||||
| Other operating expenses | |||||||||
| Operating income after expenses, depreciation and amortization | |||||||||
| (Loss) / income from associates and joint ventures | |||||||||
| Loss on net monetary position | |||||||||
| Income before tax on continuing operations | |||||||||
| Income tax on continuing operations | |||||||||
| Net income from continuing operations | |||||||||
| Net income for the fiscal year | |||||||||
| Net income for the fiscal year attributable to controlling interests | |||||||||
| Net income for the fiscal year attributable to non-controlling interests |