CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 28, 2018	Apr. 29, 2017	Apr. 28, 2018	Apr. 29, 2017
Income Statement [Abstract]
Net sales	$ 2,648,879	$ 2,369,556	$ 7,634,435	$ 6,933,438
Cost of sales	2,240,792	2,003,195	6,487,610	5,873,116
Gross profit	408,087	366,361	1,146,825	1,060,322
Operating expenses	325,779	297,469	957,964	891,820
Restructuring and asset impairment expenses	151	3,946	11,393	3,946
Total operating expenses	325,930	301,415	969,357	895,766
Operating income	82,157	64,946	177,468	164,556
Other expense (income):
Interest expense	4,468	4,225	12,368	13,188
Interest income	(121)	(82)	(308)	(278)
Other expense (income), net	(24)	478	(1,305)	760
Total other expense, net	4,323	4,621	10,755	13,670
Income before income taxes	77,834	60,325	166,713	150,886
Provision for income taxes	25,943	23,738	33,831	59,600
Net income	$ 51,891	$ 36,587	$ 132,882	$ 91,286
Basic per share data:
Net income (usd per share)	$ 1.03	$ 0.72	$ 2.63	$ 1.81
Weighted average basic shares of common stock outstanding	50,424	50,601	50,563	50,554
Diluted per share data:
Net income (usd per share)	$ 1.02	$ 0.72	$ 2.61	$ 1.80
Weighted average diluted shares of common stock outstanding	50,751	50,801	50,816	50,718