Identifiable Intangible Asset Balances (Detail) (USD $) In Millions, unless otherwise specified	Nov. 30, 2012	May 31, 2012
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	$ 169	$ 158
Accumulated Amortization	(78)	(71)
Net Carrying Amount	91	87
Unamortized intangible assets - Trademarks	283	283
IDENTIFIABLE INTANGIBLE ASSETS, NET	374	370
Patents
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	107	99
Accumulated Amortization	(32)	(29)
Net Carrying Amount	75	70
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	42	40
Accumulated Amortization	(29)	(26)
Net Carrying Amount	13	14
Other
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	20	19
Accumulated Amortization	(17)	(16)
Net Carrying Amount	$ 3	$ 3