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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2015
Share-based Compensation [Abstract]  
Stock-Based Compensation
STOCK-BASED COMPENSATION
The following table summarizes the stock-based compensation expenses included in our Condensed Consolidated Statements of Income (in millions):
 
 
Three Months Ended
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2015
 
2014
 
2015
 
2014
Cost of goods sold
 
$
3

 
$
3

 
$
9

 
$
8

Research and development expenses
 
44

 
40

 
128

 
111

Selling, general and administrative expenses
 
50

 
57

 
148

 
146

Stock-based compensation expenses included in total costs and expenses
 
97

 
100

 
285

 
265

Income tax effect
 
(53
)
 
(18
)
 
(101
)
 
(48
)
Stock-based compensation expenses, net of tax
 
$
44

 
$
82

 
$
184

 
$
217