Acquisition and Strategic Partnership (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended		1 Months Ended				1 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2010 Amega West item	Dec. 31, 2010 Amega West Customer relationships	Dec. 31, 2010 Amega West Non-compete agreements	Dec. 31, 2010 Amega West Trademarks and trade names	Jun. 30, 2011 Oilfield Alloys	Sep. 30, 2011 Oilfield Alloys	Jun. 27, 2011 Oilfield Alloys
Acquisition and strategic partnership disclosures
Net working capital, including $4.9 million of accounts payable to Carpenter effectively settled at closing			$ 6.5					$ 1.2
Property, plant and equipment			25.9					1.7
Intangible assets				5.2	5.4	1.9
Intangible assets								1.5
Goodwill			9.7					0.4
Deferred tax liabilities			(0.6)
Long-term debt			(12.4)
Total purchase price			41.6						4.8
Accounts payable included in working capital			4.9
Amount of goodwill expected to be tax deductible			8.3
Cash purchase price held back to pay earn-out participants			2.8
Multiple of holdback which can be achieved			2
Duration of earn-out			4 years 6 months
Earn-out payments, guaranteed amount included in total purchase price			2.2
Cash paid, net of cash acquired	12.9	45.4					4.1
Cash acquired							0.3
Remaining purchase price									$ 0.7