Property, Plant and Equipment (Tables)

12 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment

Property, plant and equipment consisted of the following components at June 30, 2018 and 2017:

	June 30,
($ in millions)	2018		2017
Land	$	34.8	$	34.1
Buildings and building equipment	500.0		495.7
Machinery and equipment	2,129.0		2,082.4
Construction in progress	83.6		56.3
Total at cost	2,747.4		2,668.5
Less: accumulated depreciation and amortization	1,434.0		1,351.7
Total property, plant, and equipment	$	1,313.4	$	1,316.8

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