Segment Information - Reconciliation to Property, Plant, Equipment, and Mine Development (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Segment Reporting [Line Items] | ||||
| Additions to property, plant, equipment and mine development | $ 59.8 | $ 116.2 | $ 203.6 | $ 280.8 |
| Corporate and Other (1) | ||||
| Segment Reporting [Line Items] | ||||
| Additions to property, plant, equipment and mine development | 2.1 | 1.0 | 5.5 | 2.0 |
| 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 | $ 57.7 | $ 115.2 | $ 198.1 | $ 278.8 |
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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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