Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $) In Millions, unless otherwise specified	May 31, 2013	May 31, 2012
Deferred tax assets:
Allowance for doubtful accounts	$ 20	$ 17
Inventories	40	37
Sales return reserves	101	84
Deferred compensation	197	186
Stock-based compensation	140	126
Reserves and accrued liabilities	66	66
Foreign loss carry-forwards	19	35
Foreign tax credit carry-forwards	106	216
Undistributed earnings of foreign subsidiaries	162	82
Other	47	62
Total deferred tax assets	898	911
Valuation allowance	(5)	(27)
Total deferred tax assets after valuation allowance	893	884
Deferred tax liabilities:
Property, plant and equipment	(241)	(191)
Intangibles	(96)	(98)
Other	(20)	(22)
Total deferred tax liability	(357)	(311)
NET DEFERRED TAX ASSET	$ 536	$ 573