Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Income Statement [Abstract]
Net sales	$ 1,096	$ 1,135	$ 1,995	$ 2,056
Excise taxes	242	258	444	474
Cost of sales	268	268	475	478
Gross profit	586	609	1,076	1,104
Advertising expenses	115	123	209	223
Selling, general, and administrative expenses	171	178	340	348
Other expense (income), net	(2)	5	(2)	10
Operating income	302	303	529	523
Interest income	0	0	1	1
Interest expense	12	7	22	14
Income before income taxes	290	296	508	510
Income taxes	90	88	152	152
Net income	$ 200	$ 208	$ 356	$ 358
Earnings per share:
Basic (dollars per share)	$ 0.98	$ 0.98	$ 1.73	$ 1.68
Diluted (dollars per share)	0.97	0.97	1.72	1.67
Cash dividends per common share:
Declared (dollars per share)	0.000	0.000	0.630	0.580
Paid (dollars per share)	$ 0.315	$ 0.290	$ 0.630	$ 0.580