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Stock-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-based Compensation
The following table summarizes the Company’s stock-based compensation expense for the three and six months ended June 30, 2015 and 2014.
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2015
 
2014
 
2015
 
2014
RSUs and PSUs
$
35

 
$
35

 
$
73

 
$
69

Stock options and equivalents
8

 
9

 
16

 
15

Stock-based compensation expense, before income taxes
43

 
44

 
89

 
84

Related tax benefit
(16
)
 
(17
)
 
(34
)
 
(33
)
Stock-based compensation expense, net of tax benefit
$
27

 
$
27

 
$
55

 
$
51