Acquisition (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended			1 Months Ended	12 Months Ended	0 Months Ended
	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Feb. 29, 2012 Latrobe Acquisition	Jun. 30, 2012 Latrobe Acquisition	Dec. 15, 2011 Arwin
Acquisition and strategic partnership disclosures
Shares issued through business acquisition				8.1
Cash paid, net of cash acquired	$ 12.9			$ 11.5
Cash acquired				2.5
Summary of preliminary purchase price allocation
Accounts receivable				67.0
Inventory				242.6
Property, plant and equipment				172.4		0.7
Intangible assets				87.1
Other				9.8
Accounts Payable and accrued liabilities				(64.1)
Long-term debt				(153.7)
Pension and other postretirement liabilities				(100.8)
Deferred income taxes				(45.0)
Total identifiable net assets				215.3
Goodwill	260.5	257.7	257.7	211.7		0.7
Total purchase price, net of cash acquired				427.0		1.4
Additional disclosure
Goodwill recognized deductible for income tax purposes				0
Acquisition-related costs	11.7				11.7
Transaction costs					5.2
Net sales					163.2
Operating income since acquisition					10.5
Fair value cost inventory adjustments					11.6
Proforma results
Revenue					2,339.6
Earnings					$ 160.1
Earnings per Common Share, Basic (in dollars per share)					$ 3.04
Earnings per Common Share, Diluted (in dollars per share)					$ 3.01