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Inventories
6 Months Ended
Jun. 30, 2025
Inventory Disclosure [Abstract]  
Inventories Inventories
“Inventories, net” as of June 30, 2025 and December 31, 2024 consisted of the following:
June 30, 2025December 31, 2024
 (Dollars in millions)
Materials and supplies, net$167.2 $157.5 
Raw coal100.4 109.6 
Saleable coal149.9 126.3 
Inventories, net$417.5 $393.4 
Materials and supplies inventories, net presented above have been shown net of reserves of $2.4 million and $3.5 million as of June 30, 2025 and December 31, 2024, respectively.