Segment Information, Geographic And Product Data (Net Sales By Product Segment) (Details) (USD $) In Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2009	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009
Net sales	$ 483.6	$ 464.2	$ 375.6	$ 351.7	$ 364.2	$ 336.9	$ 263.8	$ 233.7	$ 1,675.1	[1]	$ 1,198.6	[1]	$ 1,362.3	[1]
Special Alloys [Member]
Net sales									841.8		637.8		694.6
Stainless Steels [Member]
Net sales									610.5		398.3		460.1
Titanium Products [Member]
Net sales									140.7		112.4		141.4
Other Materials [Member]
Net sales									$ 82.1		$ 50.1		$ 66.2

[1] Net sales were attributed to countries based on the location of the customer.