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Earnings (Losses) Per Share (Details 2) (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May 16, 2011 0.94% Senior Exchangeable Notes Due May 2011
Debt
Average number of options and warrants excluded from diluted earnings (losses) per share (in shares)	11,642,417	14,200,915	9,241,543
Purchase amount of 0.94% senior exchangeable notes due 2011				$ 1.2

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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