Segment Information - Reconciliation to Property, Plant, Equipment, and Mine Development (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2026 |
Mar. 31, 2025 |
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| Segment Reporting [Line Items] | ||
| Additions to property, plant, equipment and mine development | $ 85.4 | $ 70.4 |
| Corporate and Other (1) | ||
| Segment Reporting [Line Items] | ||
| Additions to property, plant, equipment and mine development | 1.2 | 0.2 |
| Total Segment Excluding Corporate and Other Operating Segment | ||
| Segment Reporting [Line Items] | ||
| Additions to property, plant, equipment and mine development excluding corporate and other segment | $ 84.2 | $ 70.2 |
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- Definition Additions to property, plant, equipment and mine development excluding corporate and other segment No definition available.
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- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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