SCHEDULE II - Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2013		May 31, 2012		May 31, 2011
Allowance for Sales Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 173		$ 151		$ 141
Charged to Costs and Expenses	538		401		354
Charged to Other Accounts	1		(3)		1
Write-Offs Net of Recoveries	(471)		(376)		(345)
Balance at End of Period	241		173		151
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	91	[1]	120	[1]	109
Charged to Costs and Expenses	31		21		28
Charged to Other Accounts	1		(9)		14
Write-Offs Net of Recoveries	(19)		(41)		(31)
Balance at End of Period	$ 104	[1]	$ 91	[1]	$ 120	[1]

[1] The non-current portion is classified in deferred income taxes and other assets on the consolidated balance sheets.