CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,836.3	$ 1,475.6	$ 2,181.1
Cost of sales	1,686.5	1,470.4	1,822.4
Cost of sales - inventory write-downs from restructuring	0.0	4.2	29.3
Gross profit	149.8	1.0	329.4
Selling, general and administrative expenses	174.7	180.2	201.0
Restructuring and asset impairment charges	0.0	16.6	68.5
Goodwill impairment	0.0	52.8	34.6
Operating (loss) income	(24.9)	(248.6)	25.3
Interest expense, net	44.9	32.7	19.8
Debt extinguishment losses, net	6.0	8.2	0.0
Other (income) expense, net	(12.7)	8.4	(0.6)
(Loss) income before income taxes	(63.1)	(297.9)	6.1
Income tax (benefit) expense	(14.0)	(68.3)	4.6
Net (loss) income	$ (49.1)	$ (229.6)	$ 1.5
(LOSS) EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ (1.01)	$ (4.76)	$ 0.02
Diluted (in dollars per share)	$ (1.01)	$ (4.76)	$ 0.02
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	48.5	48.3	48.1
Diluted (in shares)	48.5	48.3	48.2