Unaudited 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 Comprehensive Income [Abstract]
Net income	$ 1,251	$ 1,115	$ 2,769	$ 2,482
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	78	28	396	(61)
Change in net gains (losses) on cash flow hedges	(103)	(155)	(761)	(119)
Change in net gains (losses) on other	(3)	(1)	(8)	1
Total other comprehensive income (loss), net of tax	(28)	(128)	(373)	(179)
TOTAL COMPREHENSIVE INCOME	$ 1,223	$ 987	$ 2,396	$ 2,303