Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Income Statement [Abstract]
Net sales	$ 1,079	$ 1,014	$ 1,975	$ 1,892
Excise taxes	246	237	455	449
Cost of sales	257	252	467	454
Gross profit	576	525	1,053	989
Advertising expenses	111	107	214	199
Selling, general, and administrative expenses	162	159	318	308
Other (income) expense, net	(8)	(3)	(7)	(2)
Operating income	311	262	528	484
Interest income	1	1	1	1
Interest expense	7	5	13	11
Income before income taxes	305	258	516	474
Income taxes	99	85	167	154
Net income	$ 206	$ 173	$ 349	$ 320
Earnings per share:
Basic	$ 0.97	$ 0.81	$ 1.63	$ 1.50
Diluted	$ 0.96	$ 0.80	$ 1.62	$ 1.49
Cash dividends per common share:
Declared	$ 0.000	$ 0.000	$ 0.510	$ 0.467
Paid	$ 0.255	$ 0.233	$ 0.510	$ 0.467