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Forward delivery contracts and financial instruments
12 Months Ended
Dec. 31, 2014
Forward Delivery Contracts and Financial Instruments [Abstract]  
Forward delivery contracts and financial instruments
Forward delivery contracts and financial instruments
As a producer of primary aluminum, we are exposed to fluctuating raw material and primary aluminum prices.  From time to time we enter into fixed and market priced contracts for the sale of primary aluminum and the purchase of raw materials in future periods.
Forward Physical Delivery Agreements
Primary Aluminum Sales Contracts
Contract
Customer
Volume
Term
Pricing
Glencore Grundartangi Metal Agreement (1)
Glencore
All primary aluminum produced at Grundartangi, net of tolling and other sales commitments
January 1, 2014 through December 31, 2017
Variable, based on LME and European Duty Paid premium and product premiums, as applicable
(1)
The Glencore Grundartangi Metal Agreement is for all metal produced at Grundartangi from 2014 through 2017 less commitments under existing tolling and other sales contracts.  Grundartangi currently estimates that it will sell Glencore approximately 205,000 tonnes of aluminum under this agreement in 2015.     
See Note 22 Subsequent events for additional information about a new aluminum supply agreement with Glencore.
Tolling Contracts
Contract
Customer
Volume
Term
Pricing
Glencore Toll Agreement
Glencore
90,000 tonnes per year ("tpy")
Through July 2016
Variable, based on LME and European Duty Paid premium
Apart from the Glencore Grundartangi Metal Agreement, the Southwire Metal Agreement (which expired at the end of 2014) and the Glencore Sweep Agreement (a contract for all metal produced in the U.S. in 2013, less existing sales agreements and valued-added metal sales, which expired at the end of 2013), we had the following forward delivery contractual commitments:
Other forward delivery contracts
 
December 31, 2014
December 31, 2013
 
(in tonnes)
Other forward delivery contracts – total
6,108

118,373

Other forward delivery contracts – Glencore
4,058

20,008


We had no outstanding primary aluminum forward financial sales contracts at December 31, 2014. We had no fixed price forward financial contracts to purchase aluminum at December 31, 2014.