Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Income Statement [Abstract]
Sales	$ 978	$ 987
Excise taxes	212	221
Net sales	766	766
Cost of sales	268	243
Gross profit	498	523
Advertising expenses	92	98
Selling, general, and administrative expenses	164	168
Other expense (income), net	(6)	(7)
Operating income	248	264
Non-operating postretirement expense	1	2
Interest income	(2)	(2)
Interest expense	21	22
Income before income taxes	228	242
Income taxes	42	42
Net income	$ 186	$ 200
Earnings per share:
Basic (dollars per share)	$ 0.39	$ 0.42
Diluted (dollars per share)	$ 0.39	$ 0.41