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Stock-based Compensation (Schedule Of Deferred Performance Share Units) (Details) - Deferred Performance Units [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Number of Shares	30,876
Granted, Number of Shares	26,906
Performance factor adjustment, Number of Shares	(25,882)
Converted to common shares, Number of Shares	(192)		0
Forfeited, Number of Shares	(940)
Outstanding, Number of Shares	30,768	30,876
Vested, Number of Shares	4,802
Outstanding, Weighted-Average Grant Date Fair Value Per Share	$ 107.66
Granted, Weighted-Average Grant Date Fair Value Per Share	110.65	$ 110.19	$ 94.54
Performance factor adjustment, Weighted-Average Grant Date Fair Value Per Share	110.19
Converted to common shares, Weighted-Average Grant Date Fair Value Per Share	94.54
Forfeited, Weighted-Average Grant Date Fair Value Per Share	110.65
Outstanding, Weighted-Average Grant Date Fair Value Per Share	108.14	$ 107.66
Vested, Weighted-Average Grant Date Fair Value Per Share	$ 94.54
Outstanding, Aggregate Intrinsic Value	$ 5,460
Vested, Aggregate Intrinsic Value	$ 852
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of original target number of vested shares	0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of original target number of vested shares	100.00%

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-SubTopic 10
-Section 50
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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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