Selected Quarterly Financial Data (Unaudited) - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
Dec. 31, 2013	Dec. 31, 2013	Nov. 04, 2013 Tungsten Materials Business [Member]	Dec. 31, 2013 Iron Castings and Fabricated Components Businesses [Member]	Sep. 30, 2013 Iron Castings and Fabricated Components Businesses [Member]	Dec. 31, 2013 Iron Castings and Fabricated Components Businesses [Member]	Dec. 31, 2012 Iron Castings Business [Member]	Dec. 31, 2012 Iron Castings Business [Member] Fourth Quarter [Member]
Unusual Or Infrequent Item [Line Items]
Gain on disposed operation net of tax			$ 261.4
Restructuring costs, net of tax	$ 41.2	$ 41.2		$ 6.1	$ 5.8	$ 11.9	$ 8.8	$ 8.8

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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