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Summary of Significant Accounting Policies, Textuals, Equity Method Investee (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Noncontrolling Interest
Equity in income from Anglesey	$ 0	$ 0	$ 0
Anglesey Aluminium Limited
Noncontrolling Interest
Ownership percentage of Anglesey	49.00%
Equity in income from Anglesey	0	0	0
Carrying amount of equity method investments	$ 0

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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