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

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

 

 

 

March 31,

 

 

December 31,

 

 

 

2023

 

 

2022

 

Raw materials

 

$

358.8

 

 

$

341.2

 

Work in process

 

 

15.8

 

 

 

16.0

 

Finished goods

 

 

201.1

 

 

 

198.4

 

Supplies and materials

 

 

427.7

 

 

 

421.7

 

Inventories

 

$

1,003.4

 

 

$

977.3