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Derivative Financial Instruments and Related Hedging Programs, Notional Quantity Table (Details) | Sep. 30, 2015 EUR (€) MMBTU mmlbs MWH
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Remainder of 2015 |
Derivative [Line Items] |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced | 76.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced | 54.00%
2016 |
Derivative [Line Items] |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced | 75.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced | 54.00%
2017 |
Derivative [Line Items] |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced | 57.00%
Percentage of Electricity Purchases For Which Company Exposure To Fluctuations In Electricity Prices Have Been Reduced | 54.00%
2018 |
Derivative [Line Items] |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices had been substantially reduced | 11.00%
Not Designated as Hedging Instrument | Electricity Member | Fixed priced contracts | Purchase |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | MWH | 44,180
Not Designated as Hedging Instrument | Aluminum | Fixed priced contracts | Purchase |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 148.9
Not Designated as Hedging Instrument | Aluminum | Fixed priced contracts | Sales |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 2.4
Not Designated as Hedging Instrument | Aluminum | Midwest premium swap contracts | Purchase |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 87.8
Not Designated as Hedging Instrument | Natural Gas | Fixed priced contracts | Purchase |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | MMBTU | 6,820,000
Designated as Hedging Instrument [Member] | Foreign Currency Member | Fixed priced contracts | Purchase |
Derivative [Line Items] |
Notional amount of contracts | € | € 7,315,000

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