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Segment Information (Tables)
3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Reportable Segment Results
Reportable segment results were as follows:
Three Months Ended March 31,
 20212020
 (Dollars in millions)
Revenues:
Seaborne Thermal Mining$176.4 $201.1 
Seaborne Metallurgical Mining87.5 193.2 
Powder River Basin Mining228.4 266.6 
Other U.S. Thermal Mining149.3 192.3 
Corporate and Other9.7 (7.0)
Total$651.3 $846.2 
Adjusted EBITDA:
Seaborne Thermal Mining$28.5 $55.1 
Seaborne Metallurgical Mining(22.4)(32.7)
Powder River Basin Mining30.1 25.4 
Other U.S. Thermal Mining36.2 38.5 
Corporate and Other(11.3)(49.5)
Total$61.1 $36.8 
Reconciliation of Consolidated (Loss) Income from Continuing Operations, Net of Income Taxes to Adjusted EBITDA
A reconciliation of consolidated loss from continuing operations, net of income taxes to Adjusted EBITDA follows:
Three Months Ended March 31,
20212020
 (Dollars in millions)
Loss from continuing operations, net of income taxes$(77.7)$(129.3)
Depreciation, depletion and amortization68.3 106.0 
Asset retirement obligation expenses15.9 17.6 
Restructuring charges2.1 6.5 
Transaction costs related to joint ventures— 4.2 
Changes in deferred tax asset valuation allowance and reserves and amortization of basis difference related to equity affiliates(1.5)(0.7)
Interest expense52.4 33.1 
Gain on early debt extinguishment(3.5)— 
Interest income(1.5)(3.1)
Unrealized losses on economic hedges1.9 2.2 
Unrealized losses (gains) on non-coal trading derivative contracts7.6 (0.1)
Take-or-pay contract-based intangible recognition(1.1)(2.6)
Income tax (benefit) provision(1.8)3.0 
Adjusted EBITDA$61.1 $36.8