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