Accounting For Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	6 Months Ended
Jan. 31, 2015
Accounting For Stock-Based Compensation [Abstract]
Options Outstanding, Beginning Balance	7,197,882
Options Outstanding, Granted	998,336
Options Outstanding, Exercised	(591,394)
Options Outstanding, Canceled	(31,509)
Options Outstanding, Ending Balance	7,573,315
Weighted Average Exercise Price, Beginning Balance	$ 26.84
Weighted Average Exercise Price, Granted	$ 38.63
Weighted Average Exercise Price, Exercised	$ 17.45
Weighted Average Exercise Price, Canceled	$ 38.95
Weighted Average Exercise Price, Ending Balance	$ 29.08

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

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- Definition

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

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

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

+ References

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- Definition

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

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- Definition

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

+ References

No definition available.

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

+ References

No definition available.

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

+ References

No definition available.

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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

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