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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+ Details

Earnings Per Share (Details 2) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Weighted-average anti-dilutive shares have been excluded from the EPS calculations	6.1	5.4	6.0
Non Vested Stock
Share-based Compensation Arrangement by Share-based Payment Award
Weighted-average anti-dilutive shares have been excluded from the EPS calculations	0.6