Identifiable Intangible Assets and Goodwill - Identifiable Intangible Asset Balances (Detail) (USD $) In Millions, unless otherwise specified	Feb. 28, 2014	May 31, 2013
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	$ 197	$ 182
Accumulated Amortization	(94)	(83)
Net Carrying Amount	103	99
Unamortized intangible assets — Trademarks	283	283
Identifiable intangible assets, net	386	382
Patents
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	132	119
Accumulated Amortization	(40)	(35)
Net Carrying Amount	92	84
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	46	43
Accumulated Amortization	(37)	(32)
Net Carrying Amount	9	11
Other
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	19	20
Accumulated Amortization	(17)	(16)
Net Carrying Amount	$ 2	$ 4