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Derivative Financial Instruments and Hedging (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Notional Disclosures [Abstract] |  |
Percentage of estimated annual nickel requirements | 10.00% |
Percentage of forecasted natural gas usage hedged for 2014 | 70.00% |
Percentage Of Forecasted Natural Gas Usage Hedged for 2015 | 35.00% |
Percentage Of Forecasted Natural Gas Usage Hedged for 2016 | 5.00% |
Percentage of on-peak and off-peak electricity hedged | 10.00% |
Percentage of forecasted international sales hedged | 10.00% |
Reclassification of Cash Flow Hedge Gain (Loss) [Abstract] |  |
Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months | $ (0.5) |
Other Comprehensive Income | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net | 5.7 | 8.0
Cost Of Sales | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net | (1.3) | (0.4)
Selling And Administrative Expenses | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net | 0 | 0
Nickel and other raw material contracts | Other Comprehensive Income | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net | 3.0 | (1.4)
Nickel and other raw material contracts | Cost Of Sales | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net | (1.7) | 0.1
Nickel and other raw material contracts | Selling And Administrative Expenses | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net | 0 | 0
Natural gas contracts | Other Comprehensive Income | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net | 2.3 | 1.6
Natural gas contracts | Cost Of Sales | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net | 1.4 | (1.0)
Natural gas contracts | Selling And Administrative Expenses | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net | 0 | 0
Electricity contracts | Other Comprehensive Income | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net | 0.9 | 0.1
Electricity contracts | Cost Of Sales | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net | 0.4 | (0.2)
Electricity contracts | Selling And Administrative Expenses | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net | 0 | 0
Foreign exchange contracts | Other Comprehensive Income | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net | (0.5) | 7.7
Foreign exchange contracts | Cost Of Sales | Not Designated as Hedging Instrument [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Net | 0.2 | 0.8
Foreign exchange contracts | Cost Of Sales | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion Net | (1.4) | 0.7
Foreign exchange contracts | Selling And Administrative Expenses | Cash Flow Hedging |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net | $ 0 | $ 0

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- Definition Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in percentage of annual forecasted requirements for on-peak electricity usage + References No definition available. + Details
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- Definition Aggregate notional amount of foreign currency derivatives for instruments with notional amounts expressed in percentage of annual forecasted international sales + References No definition available. + Details
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- Definition Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in percentage of estimated annual domestic (U.S.) usage + References No definition available. + Details
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- Definition Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in percentage of estimated annual domestic (U.S.) usage + References No definition available. + Details
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- Definition Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in percentage of estimated annual domestic (U.S.) usage + References No definition available. + Details
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- Definition Aggregate notional amount of price risk derivatives for instruments with notional amounts expressed in percentage of annual estimated usage in production + References No definition available. + Details
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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994 + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624177-113959 + Details
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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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