Consolidated Statements Of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Consolidated Statements Of Earnings [Abstract]
Net sales	$ 2,436,948	$ 2,493,248	$ 2,294,029
Cost of sales	1,589,821	1,619,485	1,480,233
Gross profit	847,127	873,763	813,796
Selling, general, and administrative	441,168	451,158	443,227
Research and development	62,630	59,589	55,286
Operating income	343,329	363,016	315,283
Other income, net	(15,762)	(19,253)	(9,505)
Interest expense	10,910	11,489	12,525
Earnings before income taxes	348,181	370,780	312,263
Income taxes	100,804	106,479	86,972
Net earnings	$ 247,377	$ 264,301	$ 225,291
Weighted average shares - basic	148,273,904	150,286,403	154,392,740
Weighted average shares - diluted	150,455,193	152,940,605	157,196,918
Net earnings per share - basic	$ 1.67	$ 1.76	$ 1.46
Net earnings per share - diluted	$ 1.64	$ 1.73	$ 1.43