Other Income, Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Other Income, Net
Unrealized gains on company owned life insurance contracts and investments held in rabbi trusts	$ 0.6	$ 0.7	$ 2.9	$ 0.1
Equity in earnings of unconsolidated subsidiaries	0.1	0.4	1.4	0.2
Interest income		0.2	0.2	0.8
Continued Dumping and Subsidy Offset Act receipt			0.1	0.1
Other income	0.5	0.4	0.6	0.2
Total other income, net	$ 1.2	$ 1.7	$ 5.2	$ 1.4