Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment (and related depreciable lives) consisted of the following ($ in millions):

	December 31,
	2019		2018
Land and improvements	$	14.8	$	15.0
Buildings and improvements (20 to 40 years or remaining life of relevant lease)	142.3		142.0
Machinery and equipment (5 to 20 years)	622.6		620.9
Construction in progress	24.0		14.6
Gross property, plant and equipment	803.7		792.5
Less: Accumulated depreciation	473.4		452.2
Property, plant and equipment, net	$	330.3	$	340.3