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Inventories
12 Months Ended
Dec. 31, 2023
Inventory Disclosure [Abstract]  
Inventories Inventories
At the end of each period, inventories were comprised of the following:
As of December 31,
(in millions)20232022
Raw materials$118.2 $79.1 
Work in process60.6 84.2 
Finished goods223.8 183.5 
    Total inventories$402.6 $346.8 
Amounts charged to the consolidated statements of operations for excess and obsolete inventory for the years ended December 31, 2023, 2022, and 2021 were $3.7 million, $8.4 million, and $2.8 million, respectively.