Condensed Consolidated Statements Of Earnings - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Income Statement [Abstract]
Net sales	$ 517,200	$ 588,500	$ 1,055,200	$ 1,185,000
Cost of sales	346,400	385,400	706,300	772,800
Gross profit	170,800	203,100	348,900	412,200
Operating expenses	117,100	137,300	239,700	269,400
Operating income	53,700	65,800	109,200	142,800
Interest expense	5,500	3,700	10,500	7,200
Other income, net	(1,200)	(3,300)	(4,100)	(7,100)
Earnings before income taxes	49,400	65,400	102,800	142,700
Income taxes	11,400	17,400	26,300	38,800
Net earnings	$ 38,000	$ 48,000	$ 76,500	$ 103,900
Weighted average shares - basic (in shares)	133.7	138.0	133.8	138.8
Weighted average shares - diluted (in shares)	134.4	139.7	134.7	140.6
Net earnings per share - basic (in usd per share)	$ 0.28	$ 0.35	$ 0.57	$ 0.75
Net earnings per share - diluted (in usd per share)	0.28	0.34	0.57	0.74
Dividends paid per share (in usd per share)	$ 0.170	$ 0.165	$ 0.340	$ 0.330