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Inventories (Tables)
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Components of Inventories

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

 

 

 

March 31,

 

 

December 31,

 

 

 

2024

 

 

2023

 

Raw materials

 

$

322.4

 

 

$

326.2

 

Work in process

 

 

15.7

 

 

 

14.9

 

Finished goods

 

 

189.9

 

 

 

200.5

 

Supplies and materials

 

 

475.6

 

 

 

471.5

 

Inventories

 

$

1,003.6

 

 

$

1,013.1