Associate Benefit Plans (Summary Of Stock Options By Range Of Exercise Price) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Aug. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding at August 31, 2013	1,224
Weighted average remaining contractual life of options outstanding	4 years 6 months
Weighted average exercise price of options outstanding	$ 58.30
Intrinsic value of options outstanding	$ 21,658
Number of options exercisable at August 31, 2013	385
Weighted average remaining contractual life of options exercisable	3 years 1 month 6 days
Weighted average exercise price of options exercisable	$ 48.78
Intrinsic value of options exercisable	10,478
$23.41 - $38.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 23.41
Range of exercise prices, upper limit	$ 38.07
Number of options outstanding at August 31, 2013	87
Weighted average remaining contractual life of options outstanding	2 years
Weighted average exercise price of options outstanding	$ 37.08
Intrinsic value of options outstanding	3,373
Number of options exercisable at August 31, 2013	87
Weighted average remaining contractual life of options exercisable	2 years
Weighted average exercise price of options exercisable	$ 37.08
Intrinsic value of options exercisable	3,373
38.08 - 44.17 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 38.08
Range of exercise prices, upper limit	$ 44.17
Number of options outstanding at August 31, 2013	222
Weighted average remaining contractual life of options outstanding	3 years
Weighted average exercise price of options outstanding	$ 43.80
Intrinsic value of options outstanding	7,163
Number of options exercisable at August 31, 2013	110
Weighted average remaining contractual life of options exercisable	2 years 9 months 18 days
Weighted average exercise price of options exercisable	$ 43.43
Intrinsic value of options exercisable	3,587
44.18 - 65.76 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 44.18
Range of exercise prices, upper limit	$ 65.76
Number of options outstanding at August 31, 2013	281
Weighted average remaining contractual life of options outstanding	3 years 8 months 12 days
Weighted average exercise price of options outstanding	$ 53.82
Intrinsic value of options outstanding	6,226
Number of options exercisable at August 31, 2013	127
Weighted average remaining contractual life of options exercisable	3 years 2 months 12 days
Weighted average exercise price of options exercisable	$ 52.76
Intrinsic value of options exercisable	2,947
65.77 - 73.71 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, lower limit	$ 65.77
Range of exercise prices, upper limit	$ 73.71
Number of options outstanding at August 31, 2013	634
Weighted average remaining contractual life of options outstanding	5 years 8 months 12 days
Weighted average exercise price of options outstanding	$ 68.28
Intrinsic value of options outstanding	4,896
Number of options exercisable at August 31, 2013	61
Weighted average remaining contractual life of options exercisable	5 years 1 month 6 days
Weighted average exercise price of options exercisable	$ 66.69
Intrinsic value of options exercisable	$ 571

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

-Subparagraph d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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