Stock-Based Compensation (Summary Of Stock Option Activity) (Details) - $ / shares	12 Months Ended
Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Beginning Balance (in shares)	6,685,551	6,822,390	7,191,442
Granted (in shares)	881,050	888,500	969,450
Exercised (in shares)	(738,635)	(978,193)	(916,789)
Canceled (in shares)	(42,154)	(47,146)	(421,713)
Options Outstanding, Ending Balance (in shares)	6,785,812	6,685,551	6,822,390
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Beginning Balance (in dollars per share)	$ 32.60	$ 30.09	$ 29.38
Granted (in dollars per share)	45.70	42.65	28.19
Exercised (in dollars per share)	26.47	24.04	19.39
Canceled (in dollars per share)	39.52	36.51	36.95
Weighted Average Exercise Price, Ending Balance (in dollars per share)	$ 34.93	$ 32.60	$ 30.09

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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