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Segment Information (Tables)
3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Reconciliation of Assets from Segment to Consolidated
The following table presents total assets at the division level:
March 31, 2025December 31, 2024
(Dollars in millions)
Seaborne$2,434.6 $2,465.3 
U.S. Thermal1,315.0 1,346.9 
Corporate and Other2,034.1 2,141.5 
Total assets$5,783.7 $5,953.7 
Reportable Segment Results
Segment results for the three months ended March 31, 2025 were as follows:
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$265.1 $220.1 $275.6 $168.7 $7.5 $937.0 
Less Significant Segment Expenses:
Labor costs35.1 55.0 49.8 50.2 
Repair costs24.8 47.0 31.5 34.1 
Outside services26.8 72.1 31.1 35.8 
Commodities expense19.1 13.4 38.7 19.5 
Sales related costs54.6 54.0 75.3 10.0 
Other expenses (1)
20.5 (34.6)12.9 (13.8)
Adjusted EBITDA84.2 13.2 36.3 32.9 (22.6)144.0 
Additions to property, plant, equipment and mine development8.5 53.2 3.9 4.6 0.2 70.4 
Loss from equity affiliates— — — — 6.7 6.7 
Segment results for the three months ended March 31, 2024 were as follows:
Seaborne ThermalSeaborne MetallurgicalPowder River BasinOther U.S. ThermalCorporate
and Other
Consolidated
 (Dollars in millions)
Revenue$283.9 $247.0 $254.1 $191.6 $7.0 $983.6 
Less Significant Segment Expenses:
Labor costs37.7 49.3 51.8 52.9 
Repair costs37.9 32.7 34.9 32.4 
Outside services31.0 54.6 31.9 36.6 
Commodities expense23.9 15.7 41.1 19.3 
Sales related costs52.1 52.0 69.8 13.6 
Other expenses (1)
7.5 (5.6)8.2 (9.7)
Adjusted EBITDA93.8 48.3 16.4 46.5 (44.5)160.5 
Additions to property, plant, equipment and mine development14.539.45.02.30.261.4
Loss from equity affiliates— — — — 3.73.7 
(1)    Other expenses for the mining operations primarily include lease expense; non-sales related taxes; insurance expense; joint facility charges; and credits related to the capitalization of costs to the balance sheet.
Reconciliation of Consolidated (Loss) Income from Continuing Operations, Net of Income Taxes to Adjusted EBITDA
A reconciliation of consolidated income from continuing operations before income taxes to Adjusted EBITDA follows:
Three Months Ended March 31,
20252024
 (Dollars in millions)
Income from continuing operations before incomes taxes$43.2 $65.8 
Depreciation, depletion and amortization92.1 79.8 
Asset retirement obligation expenses13.6 12.9 
Restructuring charges1.7 0.1 
Transaction costs related to business combinations2.4 — 
Provision for NARM loss— 1.8 
Changes in amortization of basis difference related to equity affiliates(0.6)(0.4)
Interest expense, net of capitalized interest11.5 14.7 
Interest income(15.4)(19.2)
Unrealized (gains) losses on foreign currency option contracts(4.3)5.7 
Take-or-pay contract-based intangible recognition(0.2)(0.7)
Total Adjusted EBITDA$144.0 $160.5