Business Segments (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Segment Data
Net sales	$ 581.4	$ 539.9	$ 1,659.9	$ 1,385.1
Pension earnings, interest & deferrals	(8.0)	(3.8)	(23.9)	(11.1)
Operating income	53.0	55.7	167.3	143.6
Depreciation and amortization	26.1	21.3	77.1	58.5
Capital Expenditures	86.6	47.0	223.5	107.3
Assets	2,916.3		2,916.3		2,627.8
Specialty Alloys Operations
Segment Data
Net sales	392.8	426.0	1,122.8	1,122.2
Operating income	48.8	66.7	152.9	163.9
Depreciation and amortization	14.2	13.4	41.6	39.5
Capital Expenditures	76.2	34.9	183.0	74.5
Assets	1,461.5		1,461.5		1,293.3
Latrobe
Segment Data
Net sales	129.5	51.5	365.3	71.1
Operating income	12.3	2.1	41.2	3.4
Depreciation and amortization	5.7	2.0	17.1	2.2
Capital Expenditures	4.6	1.9	19.9	1.9
Assets	794.3		794.3		807.5
Performance Engineered Products
Segment Data
Net sales	90.4	90.8	282.0	257.4
Operating income	10.0	10.6	30.4	32.8
Depreciation and amortization	5.0	4.5	14.3	13.0
Capital Expenditures	5.4	7.9	18.0	26.7
Assets	401.6		401.6		394.7
Intersegment
Segment Data
Net sales	(31.3)	(28.4)	(110.2)	(65.6)
Operating income	0.2	(1.4)	(2.0)	(4.1)
Depreciation and amortization	(0.2)		(0.4)	(0.2)
Capital Expenditures	(0.5)	(0.4)	(1.4)	(1.8)
Assets	(27.5)		(27.5)		(18.7)
Corporate
Segment Data
Operating income	(10.3)	(18.5)	(31.3)	(41.3)
Depreciation and amortization	1.4	1.4	4.5	4.0
Capital Expenditures	0.9	2.7	4.0	6.0
Assets	$ 286.4		$ 286.4		$ 151.0