FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

May 31, 2019

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

	May 31, 2019						May 31, 2018
	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	$	4,899	$	17,343	$	22,242	$	223	$	44,079	$	44,302
Commercial paper debt securities		—		—		—		—		1,647		1,647
Money market funds		5,700		—		5,700		6,500		—		6,500
Derivative financial instruments		—		5		5		—		29		29
Total assets	$	10,599	$	17,348	$	27,947	$	6,723	$	45,755	$	52,478
Liabilities:
Derivative financial instruments	$	—	$	230	$	230	$	—	$	158	$	158