Restructuring Charges and Asset Impairment Charges - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and asset impairment charges	$ 0	$ 0	$ 18,000,000
Restructuring charges and asset impairment charges			10,400,000
Non-cash impairment charges			7,600,000
Impairment of property plant and equipment			6,500,000
Impairment of intangible assets			1,100,000
Special Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairment charges			9,400,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and asset impairment charges			$ 700,000
Other restructuring charges to be paid in future periods		$ 300,000