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Stock-Based Compensation
3 Months Ended
Jul. 31, 2020
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
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 31, 2020 and July 26, 2019:
 Three months ended
(in millions)July 31, 2020July 26, 2019
Stock options$8 $9 
Restricted stock50 42 
Employee stock purchase plan12 10 
Total stock-based compensation expense$70 $61 
Cost of products sold$7 $6 
Research and development expense8 7 
Selling, general, and administrative expense55 48 
Total stock-based compensation expense70 61 
Income tax benefits(11)(10)
Total stock-based compensation expense, net of tax$59 $51