Operating Segments and Related Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 31, 2013	May 31, 2012	May 31, 2011
Sales Revenue, Net
Regional Reporting Disclosure [Line Items]
Number of customers exceeding risk threshold	0	0	0
Net Revenues [Member]
Regional Reporting Disclosure [Line Items]
Concentration Risk, Percentage	10.00%
U.S. operations
Regional Reporting Disclosure [Line Items]
Revenues	$ 11,385	$ 9,793	$ 8,467
Long-lived assets attributable to operations (Domestic)	1,424	1,204	1,056
Japan
Regional Reporting Disclosure [Line Items]
Long-lived assets attributable to operations (Foreign)	270	360	361
BELGIUM
Regional Reporting Disclosure [Line Items]
Long-lived assets attributable to operations (Foreign)	157	164	182
China
Regional Reporting Disclosure [Line Items]
Long-lived assets attributable to operations (Foreign)	$ 212	$ 188	$ 175

Number of Customers Accounted for Percent of Company's Net Revenues

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

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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 the entity's country of domicile.

+ References

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

-Publisher FASB

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Revenues from external customers attributed to the entity's country of domicile.

+ References

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