Restructuring and Other Charges (Additional Information) (Details) (USD $)	12 Months Ended					12 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Jul. 28, 2012	Jul. 26, 2014 Fiscal 2014 Plan Employee	Jul. 26, 2014 Fiscal 2011 Plans	Jul. 25, 2015 Subsequent Event Fiscal 2015 Plan Employee	Oct. 25, 2014 Subsequent Event Fiscal 2015 Plan Pre-tax Expected Minimum	Jul. 25, 2015 Subsequent Event Fiscal 2015 Plan Pre-tax Expected Maximum	Oct. 25, 2014 Subsequent Event Fiscal 2015 Plan Pre-tax Expected Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated				4,000		6,000
Restructuring and Related Cost, Number of Positions Eliminated, Percent				5.00%
Restructuring Charges	$ 418,000,000	$ 105,000,000	$ 353,000,000	$ 418,000,000
Pre-tax restructuring charges					1,100,000,000
Percentage of workforce reduction out of global workforce						8.00%
Restructuring and Related Cost, Expected Cost							$ 250,000,000	$ 700,000,000	$ 350,000,000