XML 96 R83.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' Equity - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Millions
 9 Months Ended
Oct. 31, 2021
Jan. 31, 2021
Outstanding Stock Options    
Beginning Balance (in shares) 1,260,000  
Stock options exercised (in shares) (671,000)  
Stock options canceled (in shares) (13,000)  
Ending Balance (in shares) 576,000  
Vested and expected to vest (in shares) 575,000  
Exercisable (in shares) 545,000  
Weighted-Average Exercise Price    
Beginning Balance (in dollars per share) $ 13.55  
Stock options exercised (in dollars per share) 9.01  
Stock options canceled (in dollars per share) 35.55  
Ending Balance (in dollars per share) 18.34  
Vested and expected to vest, Weighted-Average Exercise Price (in dollars per share) 18.33  
Exercisable, Weighted-Average Exercise Price (in dollars per share) $ 17.23  
Aggregate Intrinsic Value $ 156 $ 270
Vested and expected to vest as of October 31, 2021 156  
Exercisable as of October 31, 2021 $ 149