Goodwill and Other Intangible Assets (Details 3) (USD $) In Millions	12 Months Ended
May 31, 2011	May 31, 2010	May 31, 2009
Finite Lived Intangible Assets Abstract
Intangible assets amortization expense	$ 32	$ 51	$ 73
Estimated 2012 amortization expense	immaterial
Finite Lived Intangible Assets Line Items
Net Book Value	$ 38	$ 69

The aggregate estimated amortization expense for each of the five succeeding fiscal years for intangible assets subject to amortization.

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- Details

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- Definition

Aggregate amount of amortization expense recognized for intangible asset during the period. A recognized intangible asset shall be amortized over its estimated useful life to the reporting entity unless that life is determined to be indefinite. If an intangible asset has a finite useful life, but the precise length of that life is not known, that intangible asset shall be amortized over the best estimate of its useful life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(2)

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph a(1)

+ Details

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