CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 579.1	$ 396.0	$ 1,102.0	$ 783.6
Cost of sales	509.1	382.9	977.2	745.3
Gross profit	70.0	13.1	124.8	38.3
Selling, general and administrative expenses	47.4	44.6	93.9	88.9
Operating income (loss)	22.6	(31.5)	30.9	(50.6)
Interest expense, net	13.0	10.1	25.6	20.3
Other expense (income), net	1.9	(6.6)	5.4	(10.7)
Income (loss) before income taxes	7.7	(35.0)	(0.1)	(60.2)
Income tax expense (benefit)	1.5	(5.6)	0.5	(16.1)
Net income (loss)	$ 6.2	$ (29.4)	$ (0.6)	$ (44.1)
EARNINGS (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ 0.13	$ (0.61)	$ (0.02)	$ (0.91)
Diluted (in dollars per share)	$ 0.13	$ (0.61)	$ (0.02)	$ (0.91)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	48.8	48.6	48.7	48.5
Diluted (in shares)	49.0	48.6	48.7	48.5