CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,251	$ 2,137
Other comprehensive income, net of tax:
Net foreign currency translation gains (losses)	325	(8)
Net unrealized gains on defined benefit plans	46	4
Net unrealized gains on marketable securities	3	85
Net unrealized gains (losses) on cash flow hedges	5	(24)
Total other comprehensive income, net	379	57
Comprehensive income	$ 2,630	$ 2,194