Provision for Rehabilitation Costs (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Provision for Rehabilitation Costs [Line Items] | ||
| Estimated average rate | 2.30% | 2.30% |
| Percentage of provision for rehabilitation costs | 4.17% | 4.17% |
| Gross rehabilitation costs | $ 7.1 | $ 8.1 |
| Redwing Mine [Member] | ||
| Provision for Rehabilitation Costs [Line Items] | ||
| Gross closure costs | $ 11.5 | |
| Adjusted inflation rate | 3.02% | |
| Mazowe Mine [Member] | ||
| Provision for Rehabilitation Costs [Line Items] | ||
| Gross closure costs | $ 8.3 | |
| Adjusted inflation rate | 2.30% | |