Employee Benefit Plans (Summary Assumptions Related To And Valuation Of Employee Share-Based Awards (Time-Based Restricted Stock Units)) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 25, 2015	Apr. 26, 2014	Apr. 25, 2015	Apr. 26, 2014
RESTRICTED STOCK UNITS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in millions)	33	6	44	53
Grant date fair value per share	$ 25.31	$ 19.95	$ 24.83	$ 20.50
Expected dividend	2.80%	3.10%	2.90%	3.10%
Range of Risk Free Interest Rate, Minimum	0.00%	0.00%	0.00%	0.00%
Range of Risk Free Interest Rate, Maximum	1.40%	1.70%	1.80%	1.70%
PERFORMANCE RESTRICTED STOCK UNITS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in millions)	1	2	8	6
Grant date fair value per share	$ 25.87	$ 19.85	$ 23.97	$ 21.73
Expected dividend	3.00%	3.50%	3.00%	2.70%
Range of Risk Free Interest Rate, Minimum	0.00%	0.10%	0.00%	0.00%
Range of Risk Free Interest Rate, Maximum	1.40%	1.70%	1.80%	1.70%
Range of Expected Volatility Rate, Minimum			14.40%	17.40%
Range of Expected Volatility Rate, Maximum			70.00%	70.50%