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Inventories, net (Tables)
9 Months Ended
Sep. 30, 2024
Inventories, net  
Schedule of Inventories, Net

December 31, 

September 30, 

    

2023

    

2024

(In millions)

Raw materials

$

188.3

$

127.4

Work in process

 

30.8

 

41.0

Finished products

 

249.6

 

255.0

Supplies

 

95.9

 

125.2

Total

$

564.6

$

548.6