Restructuring and Other Charges (Additional Information) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 29, 2016 USD ($) Employee	Jul. 30, 2016 USD ($)	Jul. 25, 2015 USD ($)	Jul. 26, 2014 USD ($)	Aug. 27, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 268	$ 484	$ 418
Fiscal 2015 plan
Restructuring Cost and Reserve [Line Items]
Cumulative pre-tax restructuring charges		756
Fiscal 2015 plan | Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2	5
Fiscal 2014 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			$ 417
Restructuring Reserve, Accrual Adjustment		$ 1
Subsequent Event [Member] | Fiscal 2017 plan
Restructuring Cost and Reserve [Line Items]
Restructuring, Expected Number of Employees Impacted (Employees) | Employee	5,500
Approximate workforce reduction (percentage)	7.00%
Restructuring and Related Cost, Expected Cost					$ 700
Subsequent Event [Member] | Fiscal 2017 plan | Expected Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 325
Subsequent Event [Member] | Fiscal 2017 plan | Expected Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 400