CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,571	$ 2,745	$ 7,019	$ 7,343
Other comprehensive (loss) income, net of tax:
Net foreign currency translation (losses) gains	(86)	10	(178)	(148)
Net unrealized gains on defined benefit plans	34	6	45	19
Net unrealized gains on marketable securities	3	233	91	120
Net unrealized gains (losses) on cash flow hedges	7	(18)	(9)	(36)
Total other comprehensive (loss) income, net	(42)	231	(51)	(45)
Comprehensive income	$ 2,529	$ 2,976	$ 6,968	$ 7,298