Business Segments (Results Of Operation By Reportable Segments) (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Consolidated net sales	$ 414.1	$ 351.7
Consolidated operating income	44.0	14.1
Advanced Metals Operations [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	275.0	246.6
Consolidated operating income	25.5	8.6
Premium Alloys Operations [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	125.6	107.7
Consolidated operating income	30.6	24.3
Emerging Ventures [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	26.3
Consolidated operating income	2.6
Intersegment [Member]
Segment Reporting Information [Line Items]
Consolidated net sales	(12.8)	(2.6)
Consolidated operating income	(0.9)	(0.1)
Corporate Costs [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	(10.2)	(9.9)
Pension Earnings, Interest & Deferrals [Member]
Segment Reporting Information [Line Items]
Consolidated operating income	$ (3.6)	$ (8.8)