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Earnings Per Share (Details 2) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Anti-dilutive shares excluded from the EPS calculations	4.1	4.8	4.3	5.0
Unvested Stock
Share-based Compensation Arrangement by Share-based Payment Award
Anti-dilutive shares excluded from the EPS calculations				0.2

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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