Identifiable Intangible Assets and Goodwill - Identifiable Intangible Asset Balances (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2013	May 31, 2013
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	$ 186	$ 182
Accumulated Amortization	(86)	(83)
Net Carrying Amount	100	99
Unamortized intangible assets — Trademarks	283	283
Identifiable intangible assets, net	383	382
Patents
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	123	119
Accumulated Amortization	(36)	(35)
Net Carrying Amount	87	84
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	44	43
Accumulated Amortization	(34)	(32)
Net Carrying Amount	10	11
Other
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Amount	19	20
Accumulated Amortization	(16)	(16)
Net Carrying Amount	$ 3	$ 4