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Inventories, Net (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Inventories, Net

December 31, 

March 31, 

    

2022

    

2023

(In millions)

Raw materials:

 

  

 

  

Chemicals

$

145.3

$

158.9

Component products

 

6.2

 

6.0

Total raw materials

 

151.5

 

164.9

Work in process:

 

  

 

  

Chemicals

 

32.0

 

36.7

Component products

 

20.0

 

19.4

Total in-process products

 

52.0

 

56.1

Finished products:

 

  

 

  

Chemicals

 

350.7

 

334.5

Component products

 

5.1

 

4.9

Total finished products

 

355.8

 

339.4

Supplies (chemicals)

 

81.5

 

83.4

Total

$

640.8

$

643.8