Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Income Statement [Abstract]
Sales	$ 1,178	$ 1,181	$ 3,404	$ 3,329
Excise taxes	279	277	750	749
Net sales	899	904	2,654	2,580
Cost of sales	342	333	980	896
Gross profit	557	571	1,674	1,684
Advertising expenses	104	103	308	303
Selling, general, and administrative expenses	153	149	475	478
Other expense (income), net	(4)	(1)	(13)	(13)
Operating income	304	320	904	916
Non-operating postretirement expense	1	15	3	19
Interest income	(1)	(2)	(4)	(6)
Interest expense	20	23	62	67
Income before income taxes	284	284	843	836
Income taxes	53	57	144	160
Net income	$ 231	$ 227	$ 699	$ 676
Earnings per share:
Basic (dollars per share)	$ 0.48	$ 0.47	$ 1.46	$ 1.41
Diluted (dollars per share)	$ 0.48	$ 0.47	$ 1.45	$ 1.40