Restructuring Charges and Asset Impairment Charges - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) facility
Restructuring Cost and Reserve [Line Items]
Restructuring and asset impairment charges	$ 0.0	$ 16.6	$ 68.5
Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Lease right of use assets		1.3
Other non-cash charges		0.4
Business Exit, Oil And Gas | Amega West
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges		2.0
Facility Closing
Restructuring Cost and Reserve [Line Items]
Impairment of intangible assets			7.3
Restructuring charges			$ 20.7
Number of power production facilities closed | facility			2
Fixed Cost Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 8.4
Number of positions eliminated, period percent			20.00%
Stock-based compensation income, forfeitures, noncash			$ 0.9
Payments for restructuring		3.5
Enterprise Resource System
Restructuring Cost and Reserve [Line Items]
Restructuring charges			8.3
Performance Engineered Products | Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges		14.2	26.8
Impairment of intangible assets		4.3	5.6
Business exit costs and personnel costs		0.4	4.3
Restructuring charges			31.1
Property, Plant and Equipment | Facility Closing
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges		8.2	31.4
Property, Plant and Equipment | Performance Engineered Products | Business Exit, Oil And Gas
Restructuring Cost and Reserve [Line Items]
Tangible asset impairment charges		$ 8.2	$ 21.2