Condensed Statements of Consolidated Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Condensed Statements of Consolidated Income [Abstract]
Net sales	$ 1,188,883	$ 1,047,312
Cost of products sold	747,373	629,424
Cost of products sold - restructuring	9,666	9,453
Cost of products sold - merger and integration	760	0
Gross Profit	431,084	408,435
Selling, distribution, and administrative expenses	216,552	203,261
Amortization	20,235	18,497
Other restructuring costs	9,897	18,104
Other merger and integration costs	4,685	2,656
Other operating (income) expense - net	(988)	750
Operating Income	180,703	165,167
Interest income	302	433
Interest expense	(15,422)	(16,539)
Other income - net	1,243	693
Income Before Income Taxes	166,826	149,754
Income taxes	55,303	46,873
Net Income	$ 111,523	$ 102,881
Earnings per common share:
Net Income, in USD per share	$ 0.98	$ 0.86
Net Income - Assuming Dilution, in USD per share	$ 0.98	$ 0.86
Dividends declared per common share	$ 0.48	$ 0.40