May 31,

(in millions)

2019

2018

Corporate debt securities and other

$

22,242

$

44,302

Commercial paper debt securities

—

1,647

Money market funds

5,700

6,500

Total investments

$

27,942

$

52,449

Investments classified as cash equivalents

$

10,629

$

6,808

Investments classified as marketable securities

$

17,313

$

45,641