Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Sales	$ 987	$ 929
Excise taxes	221	206
Net sales	766	723
Cost of sales	243	230
Gross profit	523	493
Advertising expenses	98	87
Selling, general, and administrative expenses	168	161
Other expense (income), net	(7)	(1)
Operating income	264	246
Non-operating postretirement expense	2	2
Interest income	(2)	(1)
Interest expense	22	16
Income before income taxes	242	229
Income taxes	42	51
Net income	$ 200	$ 178
Earnings per share:
Basic (dollars per share)	$ 0.42	$ 0.37
Diluted (dollars per share)	0.41	0.37
Cash dividends per common share:
Declared (dollars per share)	0.316	0.292
Paid (dollars per share)	$ 0.158	$ 0.146