Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 1,179	$ 962
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	(81)	2
Change in net gains (losses) on cash flow hedges	(329)	135
Change in net gains (losses) on other	(3)	2
Total other comprehensive income (loss), net of tax	(413)	139
TOTAL COMPREHENSIVE INCOME	$ 766	$ 1,101