Accounting for Stock-Based Compensation (Summary Of Stock Option Activity) (Details) |
6 Months Ended |
|---|---|
|
Jan. 31, 2016
$ / shares
shares
| |
| Options Outstanding | |
| Options Outstanding, Beginning Balance (in shares) | shares | 7,191,442 |
| Options Outstanding, Granted (in shares) | shares | 941,350 |
| Options Outstanding, Exercised (in shares) | shares | (361,571) |
| Options Outstanding, Canceled (in shares) | shares | (153,525) |
| Options Outstanding, Ending Balance (in shares) | shares | 7,617,696 |
| Weighted Average Exercise Price | |
| Weighted Average Exercise Price, Beginning Balance (in usd per share) | $ / shares | $ 29.38 |
| Weighted Average Exercise Price, Granted (in usd per share) | $ / shares | 28.07 |
| Weighted Average Exercise Price, Exercised (in usd per share) | $ / shares | 17.35 |
| Weighted Average Exercise Price, Canceled (in usd per share) | $ / shares | 37.82 |
| Weighted Average Exercise Price, Ending Balance (in usd per share) | $ / shares | $ 29.62 |