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Derivative Financial Instruments and Related Hedging Programs, Notional Quantity Table (Details) (EUR €) | Jun. 30, 2012 mmlbs
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Aluminum | Fixed priced purchase contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 80.2 |
Aluminum | Fixed priced sales contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 0.9 |
Aluminum | Midwest premium swap contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 75.5 | [1]
Natural Gas | Call option purchase contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 2,490,000 | [2]
Natural Gas | Put option sales contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 2,490,000 | [2]
Natural Gas | Fixed priced purchase contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 3,390,000 | [2]
Electricity | Fixed priced purchase contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 285,625 |
Euro | Fixed priced purchase contracts |  |
Summary of material derivative positions |  |
Notional Amount of Contracts (monetary) | 173,600 |
Hedges Relating to the Convertible Notes | Bifurcated Conversion Feature |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 3,623,830 | [3]
Hedges Relating to the Convertible Notes | Call Options |  |
Summary of material derivative positions |  |
Notional Amount of Contracts | 3,623,830 | [3]
Remainder of 2012 |  |
Summary of material derivative positions |  |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices have been reduced | 83.00% |
2013 |  |
Summary of material derivative positions |  |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices have been reduced | 68.00% |
2014 |  |
Summary of material derivative positions |  |
Percentage of natural gas purchases for which the Company's exposure to fluctuations in gas prices have been reduced | 36.00% |
[1] | Regional premiums represent the premium over the London Metal Exchange price for primary aluminum which is incurred on the Company’s purchases of primary aluminum.
[2] | As of June 30, 2012, the Company’s exposure to fluctuations in natural gas prices had been substantially reduced for approximately 83%, 68% and 36% of the expected natural gas purchases for the remainder of 2012, 2013 and 2014, respectively.
[3] | The Bifurcated Conversion Feature represents the cash conversion feature of the Convertible Notes. To hedge against the potential cash outflows associated with the Bifurcated Conversion Feature, the Company purchased cash-settled Call Options. The Call Options have an exercise price equal to the conversion price of the Convertible Notes, subject to anti-dilution adjustments substantially similar to the anti-dilution adjustments for the Convertible Notes. The Call Options will expire upon the maturity of the Convertible Notes. Although the fair value of the Call Options is derived from a notional number of shares of the Company’s common stock, the Call Options may only be settled in cash.

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