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Inventories
3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventories Inventories
“Inventories, net” as of March 31, 2025 and December 31, 2024 consisted of the following:
March 31, 2025December 31, 2024
 (Dollars in millions)
Materials and supplies, net$160.1 $157.5 
Raw coal107.5 109.6 
Saleable coal150.4 126.3 
Inventories, net$418.0 $393.4 
Materials and supplies inventories, net presented above have been shown net of reserves of $3.5 million as of March 31, 2025 and December 31, 2024, respectively.