Segment Information, Geographic And Product Data (Results Of Operation By Reportable Segments) (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
Consolidated 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]
Consolidated operating income	35.0	35.2	12.1	14.1	10.2	12.8	2.0	(13.3)	96.4		11.7		64.0
Advanced Metals Operations [Member]
Consolidated net sales									1,141.1		853.0		957.4
Consolidated operating income									62.3		11.8		34.1
Premium Alloys Operations [Member]
Consolidated net sales									533.0		348.3		413.2
Consolidated operating income									110.2		71.2		76.9
Emerging Ventures [Member]
Consolidated net sales									35.3
Consolidated operating income									3.9
Intersegment [Member]
Consolidated net sales									(34.3)		(2.7)		(8.3)
Consolidated operating income									(2.8)		0.1
Corporate Costs [Member]
Consolidated operating income									(42.0)		(33.5)		(37.5)
Pension Earnings, Interest & Deferrals [Member]
Consolidated operating income									(35.2)		(37.9)		(0.1)
Restructuring Costs [Member]
Consolidated operating income													$ (9.4)

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