CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 684.9	$ 690.1	$ 1,961.1	$ 1,792.1
Cost of sales	537.9	596.6	1,567.4	1,573.9
Gross profit	147.0	93.5	393.7	218.2
Selling, general and administrative expenses	57.0	54.2	164.8	148.0
Goodwill impairment	14.1	0.0	14.1	0.0
Operating income	75.9	39.3	214.8	70.2
Interest expense, net	12.9	14.5	38.6	40.1
Other expense, net	52.9	0.8	58.5	6.2
Income before income taxes	10.1	24.0	117.7	23.9
Income tax expense	3.8	5.4	24.8	5.9
Net income	$ 6.3	$ 18.6	$ 92.9	$ 18.0
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.12	$ 0.38	$ 1.87	$ 0.36
Diluted (in dollars per share)	$ 0.12	$ 0.38	$ 1.85	$ 0.36
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	49.7	48.8	49.5	48.7
Diluted (in shares)	50.3	49.2	50.1	49.0