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Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
We recognized the following employee share-based compensation expense during the three months ended March 31, 2015 and 2014:
 
Three Months Ended March 31,
(Dollars in millions)
2015
 
2014
Share-based compensation
$
15

 
$
15

Related tax benefit
3

 
3