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Stock-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2016
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 months ended March 31, 2016 and 2015.
 
Three Months Ended
 
March 31,
 
2016
 
2015
RSUs
$
36

 
$
38

Stock options
7

 
8

Stock-based compensation expense, before income taxes
43

 
46

Related tax benefit
(17
)
 
(18
)
Stock-based compensation expense, net of tax benefit
$
26

 
$
28