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Stock Compensation Plan (Schedule of Share Based Compensation SARs Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,061	1,171	1,324	2,290
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	215	168
Awards, granted (in shares)	146
Awards, vested (in shares)	(91)
Awards, forfeited (in shares)	(8)
Weighted-average grant-date fair value, outstanding beginning balance (in dollars per share)	$ 80.75
Weighted-average grant-date fair value, granted (in dollars per share)	58.25
Weighted-average grant-date fair value, vested (in dollars per share)	71.57
Weighted-average grant-date fair value, forfeited (in dollars per share)	79.23
Weighted-average grant-date fair value, outstanding ending balance (in dollars per share)	$ 69.45

X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

The number of stock appreciation rights, that were forfeited during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value as of the grant date of stock appreciation rights that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

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No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value at grant date for nonvested stock appreciation rights issued during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of nonvested stock appreciation rights for which the employer is contingently obligated to issue equity instruments to an employee who has not yet satisfied service criteria necessary to gain title to the underlying shares or units.

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No definition available.

+ Details

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X

- Definition

The number of stock appreciation rights, that vested during the reporting period.

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No definition available.

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X

- Definition

The weighted average fair value as of grant date pertaining to stock appreciation rights for which the grantee gained the right during the reporting period, by satisfying service requirements, to retain shares or units, in accordance with the terms of the arrangement.

+ References

No definition available.

+ Details

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X

- Details

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