Revenue - Summary of Revenue by Geography (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
United States
Disaggregation of Revenue [Line Items]
Net sales	926.6	1,393.4	1,606.7
Europe
Disaggregation of Revenue [Line Items]
Net sales	242.7	387.4	387.2
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	194.4	237.5	196.3
Mexico
Disaggregation of Revenue [Line Items]
Net sales	48.8	67.0	81.6
Canada
Disaggregation of Revenue [Line Items]
Net sales	32.9	54.2	67.8
Other
Disaggregation of Revenue [Line Items]
Net sales	$ 30.2	$ 41.6	$ 40.6