Annual report pursuant to Section 13 and 15(d)

Summary of Stock Option Activity (Detail)

v3.5.0.2
Summary of Stock Option Activity (Detail)
$ / shares in Units, $ in Millions
 12 Months Ended
Aug. 31, 2016
USD ($)
$ / shares
shares
Number of Stock Option Outstanding  
Beginning Balance | shares 3,852,663
Granted | shares 445,093
Exercised | shares (175,950)
Forfeited | shares (643,744)
Ending Balance | shares 3,478,062
Options exercisable at end of Period | shares 2,471,907
Weighted Average Exercise Price  
Beginning Balance | $ / shares $ 24.47
Granted | $ / shares 22.22
Exercised | $ / shares 20.27
Forfeited | $ / shares 26.85
Ending Balance | $ / shares 23.96
Options exercisable at end of Period | $ / shares $ 24.29
Option Outstanding weighted average remaining term 4 years 9 months
Option exercisable weighted average remaining term 3 years 2 months
Stock option, aggregate intrinsic Value | $ $ 6.3
Stock option, aggregate intrinsic Value | $ $ 4.6