Concentration Of Risk And Segment Data (Narrative) (Details) (USD $) In Billions, unless otherwise specified	12 Months Ended
Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2009
Percentage of revenue accounted by customers	90.00%
Number of customers accounted for 90% of its net revenue	52
Sales concentration floor percentage	10.00%	10.00%
Number of operating countries	25
Total foreign revenue	$ 14.2	$ 11.4	$ 9.8
Total long-lived assets in foreign countries	$ 1.5	$ 1.3	$ 1.3
Group Of 5 Customers [Member]
Percentage of revenue accounted by major customers	47.00%
Number of largest customers accounted for 47% of its net revenue	5

Number Of Customers Accounted For Ninety Percentage Of Revenue.

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Number of largest customers accounted for portion of revenue.

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Percentage Of Revenue Accounted By Customers.

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Percentage Of Revenue Accounted By Major Customers.

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Sales Concentration Floor Percentage

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Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in foreign countries in total in which the entity holds assets.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph b(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (b)

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Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a(2)

-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 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

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The number of countries in which the entity operates as of balance sheet date.

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