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Stock-Based Compensation (Tables)
 3 Months Ended
May 02, 2021
Share-based Payment Arrangement [Abstract]  
Stock-based compensation expense, net of amounts capitalized as inventory
Our Condensed Consolidated Statements of Income include stock-based compensation expense, net of amounts allocated to inventory, as follows:
 Three Months Ended
 May 2,
2021		April 26,
2020
(In millions)
Cost of revenue$25 $21 
Research and development276 134 
Sales, general and administrative128 69 
Total$429 $224 
Summary of equity award transactions
The following is a summary of equity award transactions under our equity incentive plans:
RSUs, PSUs, and Market-based PSUs Outstanding
 Number of SharesWeighted Average Grant-Date Fair Value Per Share
(In millions, except per share data)
Balances, January 31, 202115 $264.69 
Granted1 $535.82 
Vested restricted stock(4)$252.22 
Balances, May 2, 202112 $279.79