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Inventories
 3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Inventories Inventories
“Inventories, net” as of March 31, 2022 and December 31, 2021 consisted of the following:
March 31, 2022December 31, 2021
 (Dollars in millions)
Materials and supplies, net$112.8 $102.1 
Raw coal46.9 54.6 
Saleable coal109.4 70.0 
Inventories, net$269.1 $226.7 
Materials and supplies inventories, net presented above have been shown net of reserves of $9.0 million as of both March 31, 2022 and December 31, 2021.