Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Income Statement [Abstract]
Net sales	$ 3,784	$ 3,614	$ 3,404
Excise taxes	935	891	818
Cost of sales	894	928	862
Gross profit	1,955	1,795	1,724
Advertising expenses	408	395	366
Selling, general, and administrative expenses	650	610	574
Amortization expense	0	3	5
Other (income) expense, net	(1)	(1)	(76)
Operating income	898	788	855
Interest income	3	3	3
Interest expense	36	31	29
Income before income taxes	865	760	829
Income taxes	274	247	257
Net income	$ 591	$ 513	$ 572
Earnings per share:
Basic (dollars per share)	$ 2.77	$ 2.39	$ 2.61
Diluted (dollars per share)	$ 2.75	$ 2.37	$ 2.60