Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 1,141	$ 950	$ 3,232	$ 2,914
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	12	(111)	1	(221)
Change in net gains (losses) on cash flow hedges	(175)	(350)	(92)	(389)
Change in net gains (losses) on other	(7)	(1)	2	9
Total other comprehensive income (loss), net of tax	(170)	(462)	(89)	(601)
TOTAL COMPREHENSIVE INCOME	$ 971	$ 488	$ 3,143	$ 2,313