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Inventory
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Inventory Disclosure
5.    INVENTORY

Following are the components of Inventory at September 30, 2022 and December 31, 2021 (in millions):

September 30, 2022December 31, 2021
Inventory:
  Raw materials$209.0 $116.9 
  Work in process211.8198.0
  Finished goods 265.1257.3
      Total Inventory$685.9 $572.2