v3.26.1
Segment Information - Reconciliation to Adjusted EBITDA (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Segment Adjusted EBITDA excluding corporate and other segment $ 54.9 $ 80.8 $ 157.9 $ 247.4
Corporate and Other (30.9) 12.5 (51.4) (10.1)
Depreciation, depletion and amortization (107.5) (93.4) (217.0) (185.5)
Asset retirement obligation expenses (13.8) (13.8) (27.4) (27.4)
Restructuring charges (2.3) (3.5) (3.4) (5.2)
Costs related to terminated acquisition (2.3) (18.8) (5.3) (21.2)
Changes in amortization of basis difference related to equity affiliates 0.7 0.8 1.3 1.4
Interest expense, net of capitalized interest (12.7) (11.1) (23.4) (22.6)
Induced Conversion of Convertible Debt Expense (17.2) 0.0 (17.2) 0.0
Interest income 12.1 13.8 25.2 29.2
Unrealized (losses) gains on foreign currency option contracts (3.9) 4.1 (3.6) 8.4
Take-or-pay contract-based intangible recognition 0.0 0.3 0.0 0.5
(Loss) income from continuing operations before income taxes $ (122.9) $ (28.3) $ (164.3) $ 14.9