CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
NET SALES	$ 1,813.4	$ 2,226.7	$ 2,173.0
Cost of sales	1,535.0	1,908.4	1,774.1
Cost of sales - excess inventory write-down	22.5	0.0	0.0
Gross profit	255.9	318.3	398.9
Selling, general and administrative expenses	173.8	177.7	186.9
Restructuring and asset impairment charges	18.0	29.1	0.0
Goodwill impairment	12.5	0.0	0.0
Operating income	51.6	111.5	212.0
Interest expense	(28.0)	(27.7)	(17.0)
Other (expense) income, net	(2.1)	5.3	1.4
Income before income taxes	21.5	89.1	196.4
Income tax expense	10.2	30.4	63.6
Net income	$ 11.3	$ 58.7	$ 132.8
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 0.23	$ 1.11	$ 2.48
Diluted (in dollars per share)	$ 0.23	$ 1.11	$ 2.47
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	48.1	52.6	53.3
Diluted (in shares)	48.2	52.7	53.6