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Discount rate from fair value on purchase date that participants pay for shares.

+ 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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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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 (f)(2)(iii)

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

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Paragraph 2

-Subparagraph (f)(2)(i)

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

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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 (f)(2)(ii)

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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 (f)(2)(iv)

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)

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- Definition

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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Note 15 - Stock-Based Compensation (Details) - Summary of Stock Option Weighted Average Assumptions Of Employee Stock Options (USD $)	0 Months Ended			12 Months Ended
	Jan. 15, 2014	Jan. 15, 2013	Jan. 13, 2012	Aug. 31, 2014 Employee Stock Option [Member] Minimum [Member]	Aug. 31, 2013 Employee Stock Option [Member] Minimum [Member]	Aug. 31, 2012 Employee Stock Option [Member] Minimum [Member]	Aug. 31, 2014 Employee Stock Option [Member] Maximum [Member]	Aug. 31, 2013 Employee Stock Option [Member] Maximum [Member]	Aug. 31, 2012 Employee Stock Option [Member] Maximum [Member]	Aug. 31, 2014 Employee Stock Option [Member]	Aug. 31, 2013 Employee Stock Option [Member]	Aug. 31, 2012 Employee Stock Option [Member]
Note 15 - Stock-Based Compensation (Details) - Summary of Stock Option Weighted Average Assumptions Of Employee Stock Options [Line Items]
Term structure of risk-free interest rate				0.01%	0.16%	0.13%	2.60%	1.91%	2.41%
Expected life (years)				7 years 219 days	7 years 219 days	7 years 219 days	7 years 292 days	7 years 292 days	9 years 36 days
Term structure of volatility				23.00%	24.00%	29.00%	33.00%	33.00%	36.00%
Dividend yield										1.35%	1.30%	1.16%
Weighted average estimated fair value (in Dollars per share)	$ 27.04	$ 24.23	$ 24.79							$ 29.64	$ 26.87	$ 32.34
Weighted average exercise price (in Dollars per share)										$ 106.69	$ 92.22	$ 93.86
Fair value as a percentage of exercise price										27.80%	29.10%	34.50%