CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,442	$ 2,311	$ 4,693	$ 4,448
Other comprehensive income (loss), net of tax:
Net foreign currency translation gains (losses)	47	(84)	372	(92)
Net unrealized gains on defined benefit plans	10	7	56	11
Net unrealized gains on marketable securities	0	3	3	88
Net unrealized (losses) gains on cash flow hedges	(6)	8	(1)	(16)
Total other comprehensive income (loss), net	51	(66)	430	(9)
Comprehensive income	$ 2,493	$ 2,245	$ 5,123	$ 4,439