Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Statement [Abstract]
Sales	$ 4,526	$ 4,306	$ 4,276
Excise taxes	1,065	943	952
Net sales	3,461	3,363	3,324
Cost of sales	1,367	1,236	1,158
Gross profit	2,094	2,127	2,166
Advertising expenses	399	383	396
Selling, general, and administrative expenses	671	642	641
Gain on sale of business	(127)	0	0
Other expense (income), net	(15)	11	(15)
Operating income	1,166	1,091	1,144
Non-operating postretirement expense	6	5	22
Interest income	(2)	(5)	(8)
Interest expense	81	82	88
Income before income taxes	1,081	1,009	1,042
Income taxes	178	182	207
Net income	$ 903	$ 827	$ 835
Earnings per share:
Basic (dollars per share)	$ 1.89	$ 1.73	$ 1.74
Diluted (dollars per share)	$ 1.88	$ 1.72	$ 1.73