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Inventories, Net (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Inventories, Net

December 31, 

    

2021

    

2022

(In millions)

Raw materials:

 

  

 

  

Chemicals

$

76.3

$

145.3

Component products

 

5.0

 

6.2

Total raw materials

 

81.3

 

151.5

Work in process:

 

  

 

  

Chemicals

 

30.4

 

32.0

Component products

 

16.8

 

20.0

Total in-process products

 

47.2

 

52.0

Finished products:

 

  

 

  

Chemicals

 

246.4

 

350.7

Component products

 

3.8

 

5.1

Total finished products

 

250.2

 

355.8

Supplies (chemicals)

 

80.0

 

81.5

Total

$

458.7

$

640.8