Provision for rehabilitation and closure costs - Additional Information (Details) - Provision for rehabilitation and closure costs |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Bottom of range | Discount rate | ||
| Disclosure of other provisions [line items] | ||
| Significant unobservable input, liabilities | 0.1081 | 0.1117 |
| Bottom of range | Inflation factor | ||
| Disclosure of other provisions [line items] | ||
| Significant unobservable input, liabilities | 0.0350 | 0.0350 |
| Top of range | Discount rate | ||
| Disclosure of other provisions [line items] | ||
| Significant unobservable input, liabilities | 0.1166 | 0.1292 |
| Top of range | Inflation factor | ||
| Disclosure of other provisions [line items] | ||
| Significant unobservable input, liabilities | 0.0406 | 0.0496 |