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Inventories - Additional information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Inventories      
Net expense recorder for materials and supplies $ 12.5 $ 4.1 $ 3.6
Metal inventory adjustments      
Inventories      
Inventories $ 1.5 $ 7.7