Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Income Statement [Abstract]
Sales	$ 3,857	$ 4,011	$ 4,096
Excise taxes	863	922	962
Net sales	2,994	3,089	3,134
Cost of sales	973	945	951
Gross profit	2,021	2,144	2,183
Advertising expenses	383	417	437
Selling, general, and administrative expenses	667	688	697
Gain on sale of business	0	(485)	0
Other expense (income), net	(18)	(9)	22
Operating income	989	1,533	1,027
Interest income	3	2	2
Interest expense	59	46	27
Income before income taxes	933	1,489	1,002
Income taxes	264	422	318
Net income	$ 669	$ 1,067	$ 684
Earnings per share:
Basic (dollars per share)	$ 1.72	$ 2.63	$ 1.62
Diluted (dollars per share)	$ 1.71	$ 2.61	$ 1.60