Identifiable Intangible Asset Balances (Detail) (USD $) In Millions, unless otherwise specified	Feb. 29, 2012	May 31, 2011
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	$ 235	$ 171
Accumulated Amortization	(87)	(71)
Net Carrying Amount	148	100
Unamortized intangible assets- Trademarks	386	387
Identifiable intangible assets, net	534	487
Patents
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	93	80
Accumulated Amortization	(29)	(24)
Net Carrying Amount	64	56
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	47	44
Accumulated Amortization	(30)	(25)
Net Carrying Amount	17	19
Other
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	95	47
Accumulated Amortization	(28)	(22)
Net Carrying Amount	$ 67	$ 25