CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 572.4	$ 479.8
Cost of sales	480.7	394.1
Gross profit	91.7	85.7
Selling, general and administrative expenses	46.7	43.5
Operating income	45.0	42.2
Interest expense	(6.3)	(7.2)
Other income, net	1.6	0.2
Income before income taxes	40.3	35.2
Income tax expense	8.8	11.8
Net income	$ 31.5	$ 23.4
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.66	$ 0.49
Diluted (in dollars per share)	$ 0.65	$ 0.49
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	47.6	47.1
Diluted (in shares)	48.2	47.3
Cash dividends per common share (in dollars per share)	$ 0.20	$ 0.18