CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 489.0	$ 351.9	$ 1,272.6	$ 1,054.0
Cost of sales	449.5	336.5	1,194.8	1,029.1
Cost of sales - inventory write-downs from restructuring	0.0	2.6	0.0	2.6
Gross profit	39.5	12.8	77.8	22.3
Selling, general and administrative expenses	38.4	47.8	127.3	132.3
Restructuring and asset impairment charges	0.0	5.0	0.0	15.0
Goodwill impairment	0.0	0.0	0.0	52.8
Operating income (loss)	1.1	(40.0)	(49.5)	(177.8)
Interest expense, net	11.2	8.9	31.5	23.5
Debt extinguishment losses, net	0.0	0.0	0.0	8.2
Other (income) expense, net	(1.8)	8.3	(12.5)	9.4
Loss before income taxes	(8.3)	(57.2)	(68.5)	(218.9)
Income tax benefit	(0.8)	(16.7)	(16.8)	(46.4)
Net loss	$ (7.5)	$ (40.5)	$ (51.7)	$ (172.5)
LOSS PER COMMON SHARE:
Basic (in dollars per share)	$ (0.16)	$ (0.84)	$ (1.07)	$ (3.58)
Diluted (in dollars per share)	$ (0.16)	$ (0.84)	$ (1.07)	$ (3.58)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	48.6	48.3	48.5	48.3
Diluted (in shares)	48.6	48.3	48.5	48.3