Business Segments (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012
Segment Data
Net sales	$ 533.5	$ 431.1	$ 1,078.5	$ 845.2
Pension earnings, interest & deferrals	(8.0)	(3.6)	(16.0)	(7.2)
Operating income	52.7	43.9	114.3	87.9
Depreciation and amortization	25.5	18.6	51.1	37.2
Capital Expenditures	80.5	33.0	136.9	60.3
Assets	2,582.2		2,582.2		2,627.8
Specialty Alloys Operations
Segment Data
Net sales	368.3	360.5	730.0	696.3
Operating income	49.6	50.9	104.1	97.2
Depreciation and amortization	13.8	13.0	27.5	26.1
Capital Expenditures	68.2	22.0	106.8	39.6
Assets	1,332.6		1,332.6		1,293.3
Latrobe
Segment Data
Net sales	113.9	9.5	235.8	19.6
Operating income	13.2	0.7	28.9	1.2
Depreciation and amortization	5.7	0.1	11.4	0.2
Capital Expenditures	7.1		15.3
Assets	796.1		796.1		807.5
Performance Engineered Products
Segment Data
Net sales	92.9	82.3	191.6	166.5
Operating income	8.9	10.4	20.4	22.2
Depreciation and amortization	4.7	4.3	9.4	8.5
Capital Expenditures	4.1	10.2	12.6	18.8
Assets	398.6		398.6		394.7
Intersegment
Segment Data
Net sales	(41.6)	(21.2)	(78.9)	(37.2)
Operating income	(0.4)	(1.9)	(2.2)	(2.7)
Depreciation and amortization	(0.1)	(0.1)	(0.2)	(0.2)
Capital Expenditures	(0.4)	(0.7)	(0.9)	(1.4)
Assets	(57.8)		(57.8)		(18.7)
Corporate
Segment Data
Operating income	(10.6)	(12.6)	(20.9)	(22.8)
Depreciation and amortization	1.4	1.3	3.0	2.6
Capital Expenditures	1.5	1.5	3.1	3.3
Assets	$ 112.7		$ 112.7		$ 151.0