Property, Plant and Equipment (Tables)

12 Months Ended

Jun. 30, 2020

Property, Plant and Equipment [Abstract]

Summary of property, plant and equipment

Property, plant and equipment consisted of the following components at June 30, 2020 and 2019:

	June 30,
($ in millions)	2020		2019
Land	$	35.1	$	35.6
Buildings and building equipment	538.5		512.9
Machinery and equipment	2,226.4		2,183.6
Construction in progress	124.7		150.7
Total at cost	2,924.7		2,882.8
Less: accumulated depreciation	1,573.6		1,516.6
Total property, plant, and equipment	$	1,351.1	$	1,366.2

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