Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Income Statement [Abstract]
Sales	$ 1,055	$ 1,096	$ 1,911	$ 1,995
Excise taxes	225	242	420	444
Net Sales	830	854	1,491	1,551
Cost of sales	278	268	486	475
Gross profit	552	586	1,005	1,076
Advertising expenses	107	115	190	209
Selling, general, and administrative expenses	163	171	326	340
Other expense (income), net	(9)	(2)	(15)	(2)
Operating income	291	302	504	529
Interest income	1	0	1	1
Interest expense	16	12	28	22
Income before income taxes	276	290	477	508
Income taxes	79	90	135	152
Net income	$ 197	$ 200	$ 342	$ 356
Earnings per share:
Basic (dollars per share)	$ 0.51	$ 0.49	$ 0.87	$ 0.87
Diluted (dollars per share)	0.50	0.49	0.87	0.86
Cash dividends per common share:
Declared (dollars per share)	0	0	0.34	0.315
Paid (dollars per share)	$ 0.17	$ 0.1575	$ 0.34	$ 0.315