FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Feb. 29, 2020

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	February 29, 2020						May 31, 2019
	Fair Value Measurements Using Input Types						Fair Value Measurements Using Input Types
(in millions)	Level 1		Level 2		Total		Level 1		Level 2		Total
Assets:
Corporate debt securities and other	$	—	$	2,514	$	2,514	$	4,899	$	17,343	$	22,242
Commercial paper debt securities		—		11,840		11,840		—		—		—
Money market funds		—		—		—		5,700		—		5,700
Derivative financial instruments		—		22		22		—		5		5
Total assets	$	—	$	14,376	$	14,376	$	10,599	$	17,348	$	27,947
Liabilities:
Derivative financial instruments	$	—	$	274	$	274	$	—	$	230	$	230