Condensed Consolidated Statements Of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Condensed Consolidated Statements Of Earnings [Abstract]
Net sales	$ 619,371	$ 647,237	$ 1,804,354	$ 1,836,415
Cost of sales	397,870	419,008	1,185,583	1,192,435
Gross margin	221,501	228,229	618,771	643,980
Operating expenses	122,914	129,792	375,455	380,448
Operating income	98,587	98,437	243,316	263,532
Other income	(3,608)	(4,340)	(11,962)	(13,750)
Interest expense	2,719	2,787	8,275	8,856
Earnings before income taxes	99,476	99,990	247,003	268,426
Income taxes	29,634	29,044	72,235	75,106
Net earnings	$ 69,842	$ 70,946	$ 174,768	$ 193,320
Weighted average shares - basic	148,136,620	150,536,631	148,404,503	150,385,389
Weighted average shares - diluted	150,234,445	153,207,471	150,591,003	153,067,148
Net earnings per share - basic	$ 0.47	$ 0.47	$ 1.18	$ 1.29
Net earnings per share - diluted	$ 0.46	$ 0.46	$ 1.16	$ 1.26
Dividends paid per share	$ 0.100	$ 0.080	$ 0.280	$ 0.230