Condensed Consolidated Statements Of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Apr. 30, 2012		Apr. 30, 2011		Apr. 30, 2012		Apr. 30, 2011
Condensed Consolidated Statements Of Earnings [Abstract]
Net sales	$ 647,237		$ 594,565		$ 1,836,415		$ 1,668,579
Cost of sales	419,008		385,407		1,192,435		1,081,788
Gross margin	228,229		209,158		643,980		586,791
Operating expenses	129,792		125,826		380,448		361,515
Operating income, net	98,437		83,332		263,532		225,276
Interest expense	2,787		2,897		8,856		9,486
Other income, net	(4,340)		(1,381)		(13,750)		(5,990)
Earnings before income taxes	99,990		81,816		268,426		221,780
Income taxes	29,044		20,005		75,106		62,256
Net earnings	$ 70,946		$ 61,811		$ 193,320		$ 159,524
Weighted average shares - basic	150,536,631	[1]	154,651,222	[1]	150,385,389	[1]	154,716,918	[1]
Weighted average shares - diluted	153,207,471	[1]	157,408,094	[1]	153,067,148	[1]	157,524,628	[1]
Net earnings per share - basic	$ 0.47	[1]	$ 0.40	[1]	$ 1.29	[1]	$ 1.03	[1]
Net earnings per share - diluted	$ 0.46	[1]	$ 0.39	[1]	$ 1.26	[1]	$ 1.01	[1]
Dividends paid per share	$ 0.080		$ 0.065		$ 0.230		$ 0.193

[1] Current and prior year shares and per share amounts reflect the impact of the Company's two-for-one stock split that occurred March 23, 2012.