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v3.25.4

Segment and Geographic Information - Reconciliation of Assets by Segment to Consolidated Total Assets (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets | $ 5,807.2 | $ 5,953.7 | $ 5,962.1
Property, plant, equipment and mine development, net | 3,153.3 | 3,081.5 | 2,844.1
Operating lease right-of-use assets | 121.2 | 119.3 | 61.9
U.S. |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Property, plant, equipment and mine development, net | 1,334.4 | 1,432.1 | 1,523.1
Operating lease right-of-use assets | 96.0 | 85.6 | 28.7
Australia |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Property, plant, equipment and mine development, net | 1,818.9 | 1,649.4 | 1,321.0
Operating lease right-of-use assets | 25.1 | 33.7 | 33.1
Other Countries |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Operating lease right-of-use assets | 0.1 | 0.0 | 0.1
Seaborne Mining [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets | 2,543.4 | 2,465.3 | 2,088.2
U.S Thermal Mining [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets | 1,301.7 | 1,346.9 | 1,373.2
Corporate and Other (1) |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets | $ 1,962.1 | $ 2,141.5 | $ 2,500.7

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