Condensed Consolidated Statements Of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Condensed Consolidated Statements Of Earnings [Abstract]
Net sales	$ 596,944	$ 581,622	$ 1,193,454	$ 1,181,006
Cost of sales	391,469	379,974	778,927	764,964
Gross profit	205,475	201,648	414,527	416,042
Operating expenses	137,249	129,540	269,329	252,187
Operating income	68,226	72,108	145,198	163,855
Other income, net	(3,313)	(4,773)	(7,138)	(6,427)
Interest expense	3,728	1,999	7,242	4,613
Earnings before income taxes	67,811	74,882	145,094	165,669
Income taxes	18,281	16,542	39,617	45,737
Net earnings	$ 49,530	$ 58,340	$ 105,477	$ 119,932
Weighted average shares - basic	137,954,594	146,957,131	138,768,007	147,140,135
Weighted average shares - diluted	139,661,287	149,021,755	140,587,668	149,204,090
Net earnings per share - basic	$ 0.36	$ 0.40	$ 0.76	$ 0.82
Net earnings per share - diluted	$ 0.35	$ 0.39	$ 0.75	$ 0.80
Dividends paid per share	$ 0.165	$ 0.140	$ 0.330	$ 0.270