Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

For financial reporting purposes, provisions for depreciation are calculated on a straight-line basis over the following estimated useful lives of the underlying assets:

Property, Plant and Equipment Classification	Estimated Useful Lives
Buildings and improvements	30-40 years
Machinery and equipment	5-15 years
Office equipment	3-10 years

The “Property, plant and equipment, net” line item in the consolidated statements of financial position consisted of the following:

	As of December 31,
(Dollars in millions)	2023		2022
Land and improvements	$	16.8	$	23.9
Buildings and improvements	177.2		169.5
Machinery and equipment	343.0		334.1
Office equipment	70.7		61.5
Property plant and equipment, gross	607.7		589.0
Accumulated depreciation	(385.7)		(381.6)
Property, plant and equipment, net	222.0		207.4
Construction in process	144.3		151.0
Total property, plant and equipment, net	$	366.3	$	358.4