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Inventories (Tables)
9 Months Ended
Sep. 30, 2024
Inventory Disclosure [Abstract]  
Components of Inventories

The components of inventories were as follows (dollars in millions):

 

 

 

September 30,

 

 

December 31,

 

 

 

2024

 

 

2023

 

Raw materials

 

$

320.5

 

 

$

326.2

 

Work in process

 

 

15.6

 

 

 

14.9

 

Finished goods

 

 

219.3

 

 

 

200.5

 

Supplies and materials

 

 

506.5

 

 

 

471.5

 

Inventories

 

$

1,061.9

 

 

$

1,013.1