XML 50 R39.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock-based Payment Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Apr. 30, 2017
Jul. 31, 2016
Shares    
Grants of options (in shares) 894,000  
Exercises (in shares) (20,598,000)  
Forfeitures or expirations (in shares) (319,000)  
Exercisable as of April 30, 2017 11,428,000  
Outstanding as of 18,879,000 38,902,000
Weighted Average Exercise Price    
Outstanding as of July 31, 2016 $ 12.15  
Grants of options (in dollars per share) 27.66  
Exercises (in dollars per share) 8.19  
Forfeitures or expirations (in dollars per share) 17.99  
Outstanding as of April 30, 2017 17.11 $ 12.15
Exercisable as of April 30, 2017 $ 15.78  
Weighted Average Remaining Contractual Term (In years)    
Outstanding as of July 31, 2016   4 years 11 months 16 days
Outstanding as of April 30, 2017 6 years 8 months 23 days  
Exercisable as of April 30, 2017 6 years 1 month 17 days  
Aggregate Intrinsic Value    
Outstanding as of July 31, 2016 $ 508,401  
Outstanding as of April 30, 2017 260,392 $ 508,401
Exercisable as of April 30, 2017 $ 172,766