Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	May. 31, 2015	May. 31, 2014
Deferred tax assets:
Allowance for doubtful accounts	$ 11	$ 11
Inventories	59	49
Sales return reserves	143	113
Deferred compensation	258	211
Stock-based compensation	179	162
Reserves and accrued liabilities	92	95
Net operating loss carry-forwards	10	16
Undistributed earnings of foreign subsidiaries	149	194
Other	76	51
Total deferred tax assets	977	902
Valuation allowance	(9)	(9)
Total deferred tax assets after valuation allowance	968	893
Deferred tax liabilities:
Property, plant and equipment	(220)	(237)
Intangibles	(93)	(94)
Other	(38)	(2)
Total deferred tax liability	(351)	(333)
NET DEFERRED TAX ASSET	$ 617	$ 560