STOCKHOLDER'S EQUITY (Tables)

6 Months Ended

Nov. 30, 2013

Stockholders' Equity [Abstract]

Stock-Based Compensation Expense

	Three Months Ended November 30,				Six Months Ended  November 30,
(in millions)	2013		2012		2013		2012
Sales and marketing	$	39	$	43	$	81	$	81
Software license updates and product support		5		5		11		10
Hardware systems products		1		1		3		1
Hardware systems support		1		1		3		2
Services		7		8		13		17
Research and development		87		89		184		172
General and administrative		42		41		83		82
Acquisition related and other		1		4		4		21
Total stock-based compensation	$	183	$	192	$	382	$	386

Valuation of Stock Options

	Three Months Ended November 30,				Six Months Ended November 30,
	2013		2012		2013		2012
Expected life (in years)		4.7		4.7		5.1		5.1
Risk-free interest rate		1.3%		0.6%		1.4%		0.7%
Volatility		24%		30%		27%		31%
Dividend yield		1.5%		0.8%		1.6%		0.8%
Weighted-average fair value per share	$	6.28	$	11.66	$	6.62	$	7.99