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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories by Type
Inventories consisted of the following:
As of December 31,
20212020
(in millions)
Raw materials$42.4 $46.2 
Work-in-process224.0 161.3 
Finished goods
86.7 73.3 
Total
$353.1 $280.8