STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Nov. 30, 2012

Stockholders' Equity [Abstract]

Stock-Based Compensation Expense

	Three Months Ended November 30,				Six Months Ended November 30,
(in millions)	2012		2011		2012		2011
Sales and marketing	$	43	$	29	$	81	$	55
Software license updates and product support		5		5		10		8
Hardware systems products		1		—		1		1
Hardware systems support		1		2		2		3
Services		8		6		17		10
Research and development		89		68		172		139
General and administrative		41		40		82		79
Acquisition related and other		4		2		21		3
Total stock-based compensation	$	192	$	152	$	386	$	298

Valuation of Stock Options

	Three Months Ended November 30,				Six Months Ended November 30,
	2012		2011		2012		2011
Expected life (in years)		4.7		4.7		5.1		5.1
Risk-free interest rate		0.6%		0.8%		0.7%		1.7%
Volatility		30%		34%		31%		30%
Dividend yield		0.8%		0.8%		0.8%		0.7%
Weighted-average fair value per share	$	11.66	$	9.60	$	7.99	$	8.80