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Inventory (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Components of inventory
The components of inventory are summarized as follows:
 As of December 31,
(In millions)20212020
Raw materials$349.6 $314.9 
Work in process814.0 544.5 
Finished goods187.9 209.2 
Total inventory$1,351.5 $1,068.6