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Stock-Based Compensation (Tables)
3 Months Ended
Jul. 28, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Components and Classification of Stock-based Compensation Expense
The following table presents the components and classification of stock-based compensation expense for stock options, restricted stock, and employee stock purchase plan shares recognized for the three months ended July 28, 2017 and July 29, 2016:
 
Three months ended
(in millions)
July 28, 2017
 
July 29, 2016
Stock options
$
35

 
$
38

Restricted stock
48

 
34

Employee stock purchase plan
9

 
7

Total stock-based compensation expense
$
92

 
$
79

 
 
 
 
Cost of products sold
$
10

 
$
11

Research and development expense
9

 
9

Selling, general, and administrative expense
55

 
51

Restructuring charges

 
1

Acquisition-related items
2

 
7

Divestiture-related items
16

 

Total stock-based compensation expense
92

 
79

Income tax benefits
(25
)
 
(21
)
Total stock-based compensation expense, net of tax
$
67

 
$
58