Revenue - Summary of Revenue by End-use Markets (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 1,475.6	$ 2,181.1	$ 2,380.2
Aerospace and Defense
Disaggregation of Revenue [Line Items]
Net sales	710.9	1,313.7	1,327.9
Medical
Disaggregation of Revenue [Line Items]
Net sales	143.5	197.0	205.0
Transportation
Disaggregation of Revenue [Line Items]
Net sales	144.5	132.1	157.7
Energy
Disaggregation of Revenue [Line Items]
Net sales	87.8	135.4	181.7
Industrial and Consumer
Disaggregation of Revenue [Line Items]
Net sales	292.1	296.0	371.5
Distribution
Disaggregation of Revenue [Line Items]
Net sales	$ 96.8	$ 106.9	$ 136.4