Segment Information, Geographic and Product Data (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Product Data
Net sales	$ 604.6	$ 566.3	$ 503.5	$ 498.6	$ 611.8	$ 581.4	$ 533.5	$ 544.9	$ 2,173.0	$ 2,271.7	$ 2,028.7
Special alloys
Product Data
Net sales									917.0	989.9	931.4
Stainless steel
Product Data
Net sales									643.6	638.8	637.3
Alloy and tool steel
Product Data
Net sales									240.4	255.7	108.6
Titanium products
Product Data
Net sales									157.7	155.0	156.6
Powder metals
Product Data
Net sales									48.6	60.4	64.3
Distribution and other
Product Data
Net sales									$ 165.7	$ 171.9	$ 130.5