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Inventories (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Inventory, Net [Abstract]    
Inventories stated on the LIFO basis $ 7.2 $ 25.3
Inventories stated value below replacement costs 13.2 15.6
Weighted Average Cost Inventory Amount 45.3 62.9
FIFO Inventory Amount $ 29.6 $ 39.5