SCHEDULE II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Allowance for Sales Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 379	$ 308	$ 241
Charged to Costs and Expenses	788	726	619
Charged to Other Accounts	(15)	(35)	(3)
Write-Offs, Net	(708)	(620)	(549)
Balance at End of Period	444	379	308
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	78	78	104
Charged to Costs and Expenses	52	35	13
Charged to Other Accounts	(2)	(15)	(2)
Write-Offs, Net	(85)	(20)	(37)
Balance at End of Period	$ 43	$ 78	$ 78