Employee Benefit Plans (Summary Assumptions Related To And Valuation Of Employee Share-Based Awards (Employee Stock Purchase Rights)) (Details) (EMPLOYEE STOCK PURCHASE RIGHTS, USD $)	12 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012
EMPLOYEE STOCK PURCHASE RIGHTS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	25.10%	28.70%	27.20%
Risk-free interest rate	0.10%	0.40%	0.20%
Expected dividend	2.80%	1.50%	1.50%
Expected life (in years)	9 months 18 days	1 year 9 months	9 months
Weighted-average estimated grant date fair value per share	$ 5.54	$ 4.68	$ 3.81