Earnings per Share

12 Months Ended

Dec. 31, 2015

Basic earnings per share for all periods presented equals net income divided by the weighted average number of our shares outstanding during the period including participating securities. Diluted earnings per share is computed by dividing net income by the weighted average number of our shares outstanding during the period including participating securities, adjusted for the dilutive effect of our stock options, restricted shares and performance units.

The following discloses basic and diluted weighted average shares outstanding:



	Year Ended December 31,
(Shares in millions)	2015	2014	2013
Basic and Diluted weighted average shares outstanding	779	777	772

Our basic and diluted weighted average shares outstanding for the years ended December 31, 2015, 2014 and 2013, are equivalent due to the net loss attributable to shareholders. Diluted weighted average shares outstanding for the years ended December 31, 2015, 2014 and 2013, exclude potential shares for stock options, restricted shares and performance units outstanding as we have net losses for those periods and their inclusion would be anti-dilutive. The following table discloses the number of anti-dilutive shares excluded:



	Year Ended December 31,
(Shares in millions)	2015	2014	2013
Anti-dilutive potential shares	3	5	5