Unaudited Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Income Statement [Abstract]
Revenues	$ 8,554	$ 8,180	$ 17,624	$ 17,241
Cost of sales	4,876	4,564	9,984	9,502
Gross profit	3,678	3,616	7,640	7,739
Demand creation expense	877	762	1,732	1,803
Operating overhead expense	1,891	1,743	3,892	3,599
Total selling and administrative expense	2,768	2,505	5,624	5,402
Interest expense (income), net	13	15	29	22
Other expense (income), net	18	(18)	36	(80)
Income before income taxes	879	1,114	1,951	2,395
Income tax expense	112	272	234	304
NET INCOME	$ 767	$ 842	$ 1,717	$ 2,091
Earnings per common share:
Basic (in dollars per share)	$ 0.47	$ 0.51	$ 1.05	$ 1.26
Diluted (in dollars per share)	0.46	0.50	1.03	1.23
Dividends declared per common share (in dollars per share)	$ 0.20	$ 0.18	$ 0.38	$ 0.34