CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 573.0	$ 556.5	$ 1,158.4	$ 1,128.9
Cost of sales	460.4	449.5	933.1	930.2
Gross profit	112.6	107.0	225.3	198.7
Selling, general and administrative expenses	55.3	51.6	108.2	98.3
Restructuring charges	2.3	0.0	2.3	0.0
Operating income	55.0	55.4	114.8	100.4
Interest expense	(5.3)	(7.0)	(10.7)	(13.2)
Other income (expense), net	0.8	(3.2)	0.5	(1.7)
Income before income taxes	50.5	45.2	104.6	85.5
Income tax expense	11.7	9.7	24.6	18.5
Net income	$ 38.8	$ 35.5	$ 80.0	$ 67.0
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.80	$ 0.73	$ 1.65	$ 1.39
Diluted (in dollars per share)	$ 0.79	$ 0.73	$ 1.64	$ 1.38
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	48.1	47.7	48.0	47.7
Diluted (in shares)	48.5	48.0	48.4	48.1