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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)
 12 Months Ended
May 31, 2018
Cash Cash Equivalents And Short Term Investments [Abstract]  
Cash, Cash Equivalents and Marketable Securities

 

 

 

May 31,

 

(in millions)

 

2018

 

 

2017

 

Corporate debt securities and other

 

$

44,302

 

 

$

41,618

 

Commercial paper debt securities

 

 

1,647

 

 

 

5,053

 

Money market funds

 

 

6,500

 

 

 

3,302

 

Total investments

 

$

52,449

 

 

$

49,973

 

Investments classified as cash equivalents

 

$

6,808

 

 

$

5,679

 

Investments classified as marketable securities

 

$

45,641

 

 

$

44,294