CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
NET SALES	$ 570.6	$ 566.3	$ 1,668.8	$ 1,568.4
Cost of sales	494.8	471.8	1,438.9	1,275.2
Gross profit	75.8	94.5	229.9	293.2
Selling, general and administrative expenses	45.7	45.0	132.7	140.4
Restructuring charges	25.3	0	25.3	0
Operating income	4.8	49.5	71.9	152.8
Interest expense, net	(7.1)	(2.7)	(20.9)	(10.8)
Other (expense) income, net	0	(0.6)	4.8	0.1
(Loss) income before income taxes	(2.3)	46.2	55.8	142.1
Income tax (benefit) expense	(0.9)	15.6	19.6	47.4
Net (loss) income	$ (1.4)	$ 30.6	$ 36.2	$ 94.7
(LOSS) EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ (0.03)	$ 0.57	$ 0.68	$ 1.77
Diluted (in dollars per share)	$ (0.03)	$ 0.57	$ 0.68	$ 1.76
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	52.6	53.3	53.2	53.2
Diluted (in shares)	52.6	53.7	53.3	53.6
Cash dividends per common share (in dollars per share)	$ 0.18	$ 0.18	$ 0.54	$ 0.54