Property, Plant and Equipment (Tables)

12 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment

Property, plant and equipment consisted of the following components at June 30, 2017 and 2016:

	June 30,
($ in millions)	2017		2016
Land	$	34.1	$	33.0
Buildings and building equipment	495.7		484.1
Machinery and equipment	2,082.4		2,038.3
Construction in progress	56.3		52.3
Total at cost	2,668.5		2,607.7
Less: accumulated depreciation and amortization	1,351.7		1,256.3
Total property, plant, and equipment	$	1,316.8	$	1,351.4

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