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Income Per Share (Tables)
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Schedule Of Basic And Diluted Weighted Average Common Shares Outstanding
A reconciliation of the number of shares used for the basic and diluted income (loss) per share calculations is as follows:
 
Years ended December 31,
Shares in millions
2015
 
2014
 
2013
Basic weighted average common shares outstanding
144

 
146

 
148

Stock options and restricted shares

 

 
1

Diluted weighted average common shares outstanding
144

 
146

 
149