CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 676.9	$ 624.2	$ 1,394.5	$ 1,276.1
Cost of sales	499.4	501.6	1,040.7	1,029.4
Gross profit	177.5	122.6	353.8	246.7
Selling, general and administrative expenses	58.6	52.8	117.7	107.9
Restructuring and asset impairment charges	0.0	0.0	3.6	0.0
Operating income	118.9	69.8	232.5	138.8
Interest expense, net	12.2	13.0	24.6	25.7
Other expense, net	1.6	1.6	1.6	5.5
Income before income taxes	105.1	55.2	206.3	107.6
Income tax expense	21.0	12.5	37.4	21.0
Net income	$ 84.1	$ 42.7	$ 168.9	$ 86.6
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 1.68	$ 0.86	$ 3.37	$ 1.75
Diluted (in dollars per share)	$ 1.66	$ 0.85	$ 3.33	$ 1.73
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	50.2	49.7	50.2	49.4
Diluted (in shares)	50.7	50.2	50.7	50.0