Restructuring Charges and Asset Impairment Charges - Narrative (Details)	12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) facility	Jun. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and asset impairment charges	$ 16,600,000	$ 68,500,000	$ 0
Impairment of intangible assets		7,300,000
Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Lease right of use assets	1,300,000
Other non-cash charges	400,000
Business Exit, Oil And Gas | Amega West
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges	2,000,000.0
Facility Closing
Restructuring Cost and Reserve [Line Items]
Impairment of intangible assets		7,300,000
Restructuring charges		$ 20,700,000
Number of power production facilities closed | facility		2
Fixed Cost Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 8,400,000
Number of positions eliminated, period percent		20.00%
Stock-based compensation income, forfeitures, noncash		$ 900,000
Payments for restructuring	3,500,000
Enterprise Resource System
Restructuring Cost and Reserve [Line Items]
Restructuring charges		8,300,000
Performance Engineered Products | Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges	14,200,000	26,800,000
Impairment of intangible assets	4,300,000	5,600,000
Business exit costs and personnel costs	400,000	4,300,000
Restructuring charges		31,100,000
Property, Plant and Equipment | Facility Closing
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges	8,200,000	31,400,000
Property, Plant and Equipment | Performance Engineered Products | Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges	$ 8,200,000	$ 21,200,000