CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,137	$ 2,265
Other comprehensive income (loss), net of tax:
Net foreign currency translation losses	(8)	(61)
Net unrealized gains on defined benefit plans	4	6
Net unrealized gains on marketable securities	85	4
Net unrealized losses on cash flow hedges	(24)	(26)
Total other comprehensive income (loss), net	57	(77)
Comprehensive income	$ 2,194	$ 2,188