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Stock Compensation Plans (Tables)
 6 Months Ended
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock based Compensation Plans
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2014
2013
 
2014
2013
Stock-based compensation plans expense
$
34

$
18

 
$
53

$
32

Income tax benefit
(12
)
(6
)
 
(19
)
(11
)
Total stock-based compensation plans expense, after-tax
$
22

$
12

 
$
34

$
21