Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 2,539	$ 4,029	$ 1,933
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	(148)	(173)	(6)
Change in net gains (losses) on cash flow hedges	(130)	503	76
Change in net gains (losses) on other	(9)	(7)	34
Total other comprehensive income (loss), net of tax	(287)	323	104
TOTAL COMPREHENSIVE INCOME	$ 2,252	$ 4,352	$ 2,037