Income Taxes (Difference Between Income Taxes at Federal Statutory Rate and Provision for Income Taxes) (Details)	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax benefit	1.10%	0.50%	0.80%
Foreign income at other than U.S. rates	(13.40%)	(14.50%)	(15.20%)
Tax credits	(1.20%)	(1.70%)	(1.20%)
Domestic manufacturing deduction	(0.40%)	(0.60%)	(0.70%)
Nondeductible compensation	1.40%	1.40%	2.00%
Tax audit settlement	(0.00%)	(2.80%)	(0.00%)
Other, net	(0.70%)	(0.40%)	(0.90%)
Total	21.80%	16.90%	19.80%