Identified Intangible Assets and Goodwill - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Aug. 31, 2012	Aug. 31, 2011
Goodwill and Intangible Assets Disclosure [Line Items]
Increase in unamortized intangible assets due to the effect of foreign exchange fluctuations	$ 1
Increase in goodwill due to the effect of foreign exchange fluctuations	1
Amortization expense, which is included in selling and administrative expense	5	5
Estimated amortization expense for intangible assets subject to amortization, remainder of 2013	16
Estimated amortization expense for intangible assets subject to amortization, 2014	19
Estimated amortization expense for intangible assets subject to amortization, 2015	16
Estimated amortization expense for intangible assets subject to amortization, 2016	15
Estimated amortization expense for intangible assets subject to amortization, 2017	$ 14

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ 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)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

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- Definition

Amount of amortization expense expected to be recognized in the remainder of the fiscal year following the latest fiscal year ended for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

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- Definition

Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

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-Name Accounting Standards Codification

-Topic 350

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.

+ References

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Reflects increase (decrease) to the recorded value of indefinite-lived intangible assets for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of indefinite-lived intangible assets to fair value.

+ References

No definition available.

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