Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 1,092	$ 950
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	(128)	22
Change in net gains (losses) on cash flow hedges	193	(395)
Change in net gains (losses) on other	(3)	0
Total other comprehensive income (loss), net of tax	62	(373)
TOTAL COMPREHENSIVE INCOME	$ 1,154	$ 577