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Forward Delivery Contracts and Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2011
Forward Delivery Contracts and Financial Instruments [Abstract] |
Schedule of Forward Physical Delivery Agreements | Forward Physical Delivery Agreements Primary Aluminum Sales Contracts
Contract | Customer | Volume | Term | Pricing
Glencore Metal Agreement (1) | Glencore | 20,400 mtpy | Through December 31, 2013 | Variable, based on U.S. Midwest market
Glencore Sweep Agreement (2) | Glencore | Surplus primary aluminum produced in the United States | Through December 31, 2012 | Variable, based on U.S. Midwest market
Glencore Nordural Metal Agreement | Glencore | Approximately 16,000 metric tons | Through December 31, 2012 | Variable, based on LME
Southwire Metal Agreement (3) | Southwire | 240 million pounds per year (high conductivity molten aluminum) | Through December 31, 2013 | Variable, based on U.S. Midwest market
(1) | We account for the Glencore Metal Agreement as a derivative instrument under ASC 815. Under the Glencore Metal Agreement, pricing is based on then-current Midwest market prices, adjusted by a negotiated U.S. Midwest premium with a cap and a floor as applied to the current U.S. Midwest premium.
(2) | The Glencore Sweep Agreement is for all metal produced in the U.S. in 2012, less existing sales agreements and high-purity metal sales. The term of the contract may be extended for one year upon mutual agreement.
(3) | The Southwire Metal Agreement contract contains termination rights in the event of a partial or full curtailment of the Hawesville facility.
Long-term Tolling Contracts
Contract | Customer | Volume | Term | Pricing
Billiton Tolling Agreement (1) | BHP Billiton | 130,000 mtpy | Through December 31, 2013 | LME-based
Glencore Toll Agreement (1) | Glencore | 90,000 mtpy | Through July 31, 2016 | LME-based
Glencore Toll Agreement (1) | Glencore | 40,000 mtpy | Through December 31, 2014 | LME-based
(1) | Grundartangi's tolling revenues include a premium based on the EU import duty for primary aluminum.

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- Definition Tabular disclosure of arrangements in which the entity has committed resources to supply goods or services to a customer. May include identification of the goods or services to be furnished, identity of the purchasing party, pricing, effects on pricing for failing to deliver the [minimum] quantities required to be furnished, cancellation rights, and termination provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph 25 -SubTopic 10 -Topic 210 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 25 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 19 + Details
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