Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 878.1	$ 840.3
Excise taxes	212.3	202.5
Cost of sales	201.7	217.5
Gross profit	464.1	420.3
Advertising expenses	92.1	90.8
Selling, general, and administrative expenses	148.5	139.0
Amortization expense		1.3
Other (income) expense, net	1.8	3.3
Operating income	221.7	185.9
Interest income	0.6	0.8
Interest expense	5.2	7.9
Income before income taxes	217.1	178.8
Income taxes	69.6	60.7
Net income	$ 147.5	$ 118.1
Earnings per share:
Basic	$ 0.69	$ 0.54
Diluted	$ 0.69	$ 0.54
Cash dividends per common share:
Declared	$ 0.467	$ 0.427
Paid	$ 0.233	$ 0.213