Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Income Statement [Abstract]
Net sales	$ 1,083	$ 1,093	$ 3,078	$ 3,149
Excise taxes	274	280	718	754
Cost of sales	254	260	729	738
Gross profit	555	553	1,631	1,657
Advertising expenses	107	112	317	334
Selling, general, and administrative expenses	167	163	507	512
Other expense (income), net	3	6	0	16
Operating income	278	272	807	795
Interest income	0	0	1	1
Interest expense	12	6	34	21
Income before income taxes	266	266	774	775
Income taxes	76	80	229	232
Net income	$ 190	$ 186	$ 545	$ 543
Earnings per share:
Basic (dollars per share)	$ 0.94	$ 0.88	$ 2.67	$ 2.56
Diluted (dollars per share)	0.94	0.87	2.65	2.54
Cash dividends per common share:
Declared (dollars per share)	0.680	0.630	1.310	1.210
Paid (dollars per share)	$ 0.340	$ 0.315	$ 0.970	$ 0.895