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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)
 12 Months Ended
May 31, 2012
Cash, Cash Equivalents and Marketable Securities [Abstract]  
Cash, Cash Equivalents and Marketable Securities

 

                                 May 31,

(in millions)

 

 

2012

 

 

2011

Money market funds

 

$

25

 

$

        3,362

U.S. Treasury, U.S. government and U.S. government agency debt securities

 

 

100

 

 

        1,150

Commercial paper, corporate debt securities and other

 

 

16,166

 

 

      13,875

Total investments

 

$

16,291

 

$

      18,387

Investments classified as cash equivalents

 

$

570

 

$

        5,702

Investments classified as marketable securities

 

$

15,721

 

$

      12,685