Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting, Revenue Reconciling Item [Line Items]
Spin-Off costs included in selling, general, and administrative expense and not allocated to segments	$ 0.2	$ 0.7	$ 1.5	$ 7.4
Corporate [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Project costs on incremental strategic investment	$ 4.3	$ 5.1	$ 14.1	$ 8.5