Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Income Statement [Abstract]
Sales	$ 1,059	$ 1,083	$ 2,969	$ 3,078
Excise taxes	251	274	670	718
Net Sales	808	809	2,299	2,360
Cost of sales	272	254	758	729
Gross profit	536	555	1,541	1,631
Advertising expenses	102	107	291	317
Selling, general, and administrative expenses	162	167	488	507
Other expense (income), net	(1)	3	(16)	0
Operating income	273	278	778	807
Interest income	1	0	2	1
Interest expense	16	12	44	34
Income before income taxes	258	266	736	774
Income taxes	76	76	212	229
Net income	$ 182	$ 190	$ 524	$ 545
Earnings per share:
Basic (dollars per share)	$ 0.47	$ 0.47	$ 1.35	$ 1.33
Diluted (dollars per share)	0.47	0.47	1.34	1.33
Cash dividends per common share:
Declared (dollars per share)	0.365	0.34	0.705	0.655
Paid (dollars per share)	$ 0.1825	$ 0.17	$ 0.5225	$ 0.485