SCHEDULE II - Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2014		May 31, 2013		May 31, 2012
Allowance for Sales Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 241		$ 173		$ 151
Charged to Costs and Expenses	619		538		401
Charged to Other Accounts	(3)		1		(3)
Write-Offs, Net	(549)		(471)		(376)
Balance at End of Period	308		241		173
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	104	[1]	91	[1]	120	[1]
Charged to Costs and Expenses	13		31		21
Charged to Other Accounts	(2)		1		(9)
Write-Offs, Net	(37)		(19)		(41)
Balance at End of Period	$ 78	[1]	$ 104	[1]	$ 91	[1]

[1] Includes both current and non-current portions of the allowance for doubtful accounts. The non-current portion is classified in Deferred income taxes and other assets on the Consolidated Balance Sheets.