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Stock Compensation Plan (Schedule Of Share Based Compensation Option And SARs Award Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Awards, outstanding beginning balance (in shares)	2,290	2,381	2,385
Awards, granted (in shares)	86	143	198
Awards, exercised (in shares)	(1,049)	(215)	(180)
Awards, forfeited or expired (in shares)	(3)	(19)	(22)
Awards, outstanding ending balance (in shares)	1,324	2,290	2,381
Awards, exercisable ending balance (in shares)	1,092
Weighted-average exercise price, outstanding beginning balance (in dollars per share)	$ 59.12	$ 52.98	$ 47.96
Weighted-average exercise price, granted (in dollars per share)	237.86	174.42	113.67
Weighted-average exercise price, exercised (in dollars per share)	33.25	60.05	49.79
Weighted-average exercise price, forfeited or expired (in dollars per share)	172.03	108.06	80.42
Weighted-average exercise price, outstanding ending balance (in dollars per share)	91.01	$ 59.12	$ 52.98
Weighted-average exercise price, exercisable ending balance (in dollars per share)	$ 71.54
Weighted-average remaining contractual term, outstanding ending balance (in years)	5 years 4 months
Weighted-average remaining contractual term, exercisable ending balance (in years)	4 years 8 months
Aggregate intrinsic value, outstanding ending balance	$ 246,198
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	1,309
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 90.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 4 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 244,711
Aggregate intrinsic value, exercisable ending balance	$ 224,231

X

- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options and stock appreciation rights outstanding and currently exercisable under the option plan as of the balance sheet date.

+ References

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The number of shares into which fully or partially vested stock options and stock appreciation rights outstanding as of the balance sheet date can be currently converted under the plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options and stock appreciation rights outstanding and currently exercisable under the plan.

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- Definition

The weighted average period between the balance sheet date and expiration for all vested portions of options and stock appreciation rights outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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- Definition

The weighted average price at which option and stock appreciation right holders acquired shares when converting their stock options or stock appreciation rights into shares under the plan during the reporting period.

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- Definition

For presentations that combine terminations, the number of shares under options and stock appreciation rights that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the plan or that expired.

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The combined weighted average exercise price associated with stock options and stock appreciation rights during the period that have either lapsed or been forfeited.

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- Definition

The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options and stock appreciation rights awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options and stock appreciation rights outstanding under the plan as of the balance sheet date.

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The number of shares reserved for issuance under stock option agreements and stock appreciation rights awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options and stock appreciation rights.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the plan for options and stock appreciation rights.

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The weighted average period between the balance sheet date and expiration for all awards of options and stock appreciation rights outstanding under the plan, which may be expressed in a decimal value for number of years.

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The number of grants made during the period on stock appreciation rights.

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Number of share options and stock appreciation rights exercised during the current period.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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