Property, Plant and Equipment (Tables)

12 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment

Property, plant and equipment consisted of the following components at June 30, 2019 and 2018:

	June 30,
($ in millions)	2019		2018
Land	$	35.6	$	34.8
Buildings and building equipment	512.9		500.0
Machinery and equipment	2,183.6		2,129.0
Construction in progress	150.7		83.6
Total at cost	2,882.8		2,747.4
Less: accumulated depreciation and amortization	1,516.6		1,434.0
Total property, plant, and equipment	$	1,366.2	$	1,313.4

Schedule of estimated useful lives of depreciable assets

The estimated useful lives of depreciable assets are as follows:

Asset Category	Useful Life (in Years)
Buildings and building equipment	10 – 45
Machinery and equipment	3 – 30